Model Engine Maker
Engines => Your Own Design => Topic started by: stevehuckss396 on December 02, 2012, 09:36:08 PM
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In my introduction I showed the beginnings of my 1/3rd scale mini bike project. I'm going to pick it up from here and not go back to where I started as I started before my membership here. The goal is a 1/3rd scale Ruttman like the one post below.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/Ruttman_mini_bikes_003.jpg)
I designed the wrong wheels. I have 2 new drawings. One is for the 4 inch steel wheel and the other is for the 5 inch mag wheel. Should start on the wheels soon.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/untitled-6.jpg)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/untitled2-2.jpg)
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Hi Steve,
Good to see you back on the mini-bike project. Although the spoke wheels look classier I think I would stick with the original style stamped steel wheels. They more remind me of the early mini-bikes.
gbritnell
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Hi Steve,
Good to see you back on the mini-bike project. Although the spoke wheels look classier I think I would stick with the original style stamped steel wheels. They more remind me of the early mini-bikes.
gbritnell
Hello!!!
Both wheels are original to the Ruttman. The toad and the Vulture had the steel wheels and the Wild Goose had the mags. I believe all 3 bikes were built on this frame.
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good to see you back steve :ThumbsUp:
looking forward to this build...........
chuck
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Hey Steve! Good to see this thread continue!
I'm watching!
Dave
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Great Steve, I want to see it completed also. I am also glad you decided to complete it here.
Don
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I have been missing this one Steve!! Very heppy to see you back on it and posted here on MEM. Where do you stand on the engine?
Bill
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Hey, I had one of those bikes as a kid! I will be following along. Will you have a 1/3 size person to ride it? :ROFL:
Lee
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Where do you stand on the engine?
Bill
I'm still in the CAD stages right now. I basically modeled an existing engine. I have bone nothing concerning the placement of the cam to work with existing gears and choosing fasteners. Basically step one of 4 or 5.
This is all I have right now. Once the frames are in paint, I will hit the engine hard.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/untitled-4.jpg)
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I have turned the blanks for the front wheels. I made a few extras just in case. They have the
outer profile that an RC rim would have. I have the Gcode 85% done. I will do some cutting
this weekend if nothing come up.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN3144.jpg)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN3146.jpg)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN3148.jpg)
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Gee Steve, I must of missed you making the tires. I see you have enough blanks for mishaps. Sure glad you are making progress on this. I would like to finally see it completed.
Don
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You are being watched!
Bought my kid a Ruttman when he was 6 or 7. We was fun.
Glad to see you again.
Mosey :Jester: :pinkelephant:
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Steve, I went back and looked at the build log on the other site and may have missed it but saw nothing on the tires. Did you mold them yourself or find a source...they look great and will look even better with those rims :)
Bill
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Steve, I went back and looked at the build log on the other site and may have missed it but saw nothing on the tires. Did you mold them yourself or find a source...they look great and will look even better with those rims :)
Bill
They are 1.55 inch RC tires. They are so close to scale that if I blew them up to real size they would be about 1/8 inch too big.
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Thanks Steve...so does that mean you have to keep them slightly underinflated in order to fit the mini-bike frame?
Bill
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you have to keep them slightly underinflated in order to fit the mini-bike frame?
No, thats 1/8 at full scale. At one third they are about .045 too big so it wont be noticeable.
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Well I finished half of one wheel before snapping a very expensive and fragile cutter. I am trying to locate another one right now. As soon as I get my paws on one i'll get going on the other half.
I was going to make 2 wheels (4 Halfs) so i made a fixture from a small piece of Corian.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN3150.jpg)
The blank is loaded and because I just made the fixture, all I need to do is set my Z height.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN3153.jpg)
All the cutting is done first.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN3155.jpg)
Then the holes are drilled.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN3158.jpg)
Then i lightly dusted the wheel with the sand blaster to remove the machine marks and get ready
for some white paint.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN3160.jpg)
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hi steve
following along and marveling at what you do with cnc (never run one myself), hell i am in awe with every thing you make. :NotWorthy:
i was wondering about the cutter you broke, what makes it very expensive?
chuck
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i was wondering about the cutter you broke, what makes it very expensive?
It was a 1/16 inch ball nose cutter with a 1 inch reach before the shank goes to 1/8. I think I paid close to 40 bucks for it. That doesn't sound expensive but most of my cutters are under 5 bucks each.
EDIT: Just scored a cutter with a .750 reach and 1/8 depth of cut for 25 bucks
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ever use a roughing cutter to hog out the bulk of the cut?
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ever use a roughing cutter to hog out the bulk of the cut?
I try to minimize the tool changes. Things just come out nicer that way. I try to combine tools also like for instance, The radii in all of the corners are a .032 radius so I bought a 1/8 inch cutter with a .032 radius so I don't have to go back and clean out all the inside radii after cutting with the 1/8. Works out good because the home built mill doesn't like cutters much bigger than that anyway.
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Nice job again. I like the sandblasted finish, I need to check into that. Do you have a cabinet type, or what?
Lee
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Nice job again. I like the sandblasted finish, I need to check into that. Do you have a cabinet type, or what?
Lee
It's a small cabinet about 30 inches wide. It has the vacuum unit with it. It's the second one down the page for $875. I got it used with a spare bag and 2 types of media for $250
http://www.machinetoolsjwk.com/trincoblasting.htm
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Awesome Steve, I just love the wheel. Can you place a penny next to it just for size comparison? Have you found anything to make the handle bar grips yet?
Don
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Awesome Steve, I just love the wheel. Can you place a penny next to it just for size comparison? Have you found anything to make the handle bar grips yet?
Don
I'm not real happy with the wheel. I have a new plan and some new Gcode for the next try. I'll try to remember to spot something next to the wheels in the next shot. If it helps it was 1.625 inch barstock.
Haven't even thought about the grips yet. I'll figure something out.
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Thats looking great Steve! I love what you do man! :NotWorthy:
Following along....
Dave
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Somehow i missed this last update Steve. The wheel looks great to me and I whole heartedly agree that bead blasting gives a very nice finish in lots of cases. Though I haven't used it with painted parts like the wheel, I suspect is will help paint adhesion too. Looking forward to the next update now!!
Bill
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I finally have a frame in rolling form. I made the rims and other axle parts today. I had to make the axle bolts and bolts to hold on the forks. #12 bolts are not easy to find.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN0734s.jpg) (http://s770.photobucket.com/user/stevehuckss396/media/Minibike/DSCN0734s.jpg.html)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN0736s.jpg) (http://s770.photobucket.com/user/stevehuckss396/media/Minibike/DSCN0736s.jpg.html)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN0739s.jpg) (http://s770.photobucket.com/user/stevehuckss396/media/Minibike/DSCN0739s.jpg.html)
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Powdercoat?
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Powdercoat?
I doubt it. It needs to be the original color, or one of them. They came with the Chrysler "HIP" colors on them. Plum Crazy, Sublime, Lemon Twist, you remember. I think I can get most of the colors in Testors model paint and air brush it on there.
http://www.stormcomm.net/dodgegirl/highimpact.htm
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Hey!we back on track again Steve. Love the frame on wheels man, great job. Looking forward to more progress.
Don
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Hey!we back on track again Steve.
I'm hoping to be. I want to get the frame rolling, get the foot pegs on and kick stand so I can return the mini I borrowed to measure this thing up.
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Glad you're back on his Steve. Will be watching and learning as usual. Someday I hope to do your V-8.
Ron
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Got a little something done today. I modified my soldering fixture and made the blocks to hold the foot peg mounts in place so they can be soldered to the frame. I also got a jump on the kick stand. I have a plan that might work to get it mounted.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN0741s.jpg) (http://s770.photobucket.com/user/stevehuckss396/media/Minibike/DSCN0741s.jpg.html)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN0744s.jpg) (http://s770.photobucket.com/user/stevehuckss396/media/Minibike/DSCN0744s.jpg.html)
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Cool Steve, I'm with you bud. Waiting to see more progress.
Don
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Little more done today. I made the foot peg mounts and silver soldered them in place using the modified fixture. I also made the kick stand parts and now have them silver soldered as well. I need to do a little more work and the frames will be ready for paint.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN0748s.jpg) (http://s770.photobucket.com/user/stevehuckss396/media/Minibike/DSCN0748s.jpg.html)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN0746.jpg) (http://s770.photobucket.com/user/stevehuckss396/media/Minibike/DSCN0746.jpg.html)
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Awe man, that is too cool Steve. If you didn't know it was a model you would never know looking at it. You have done a beautiful job making it look like the orginal. :praise2: :praise2:
Don
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Awe man, that is too cool Steve. If you didn't know it was a model you would never know looking at it. You have done a beautiful job making it look like the orginal. :praise2: :praise2:
Don
Thanks Don!
I'm searching for original colors. I guess the original colors are the Chrysler "HIP" colors. The high impact paint colors were plum crazy, go mango, lemon twist, hemi orange, ect. Basically all the late 60's early 70's colors.
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Looks awesome Steve!
:ThumbsUp: :ThumbsUp: :ThumbsUp:
Dave
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Well the paint work is not the greatest but if you have seen my other projects it's about what you have come to expect. I'm not very good with that type of stuff. The color is Plum Crazy. That is one of the original colors for an early 70's ruttman.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN0755s.jpg) (http://s770.photobucket.com/user/stevehuckss396/media/Minibike/DSCN0755s.jpg.html)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN0757s.jpg) (http://s770.photobucket.com/user/stevehuckss396/media/Minibike/DSCN0757s.jpg.html)
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Yikes, it's alive! Great! Keep it coming.
Mosey
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That looks just like mine!....before I burned it up.... :facepalm: :embarassed:
Keep it coming Steve!
Dave
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That looks just like mine!....before I burned it up.... :facepalm: :embarassed:
Keep it coming Steve!
Dave
I built one when my son was born. Too bad it was worn out before he was old enough to ride it.
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Love the color Steve!!!
Bill
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Love it Steve. :ThumbsUp:
Don
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Burned mine to the ground....didn't have much money...replaced the tires with snowblower tires....studs and all! Price was right!
Ran the throttle with my right hand on the carb and steered with the left!
Dave
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Thanks for the thumbs up everybody.
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Found a little time, made a little piece
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSC_0002s.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSC_0003s.jpg~original)
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Very nice Steve. I can sure see the advantages of CNC on parts like this. As I recall, this is 1/3 scale, right?
Bilk
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Very nice Steve. I can sure see the advantages of CNC on parts like this. As I recall, this is 1/3 scale, right?
Bilk
Yes sir that is correct. Tiny!
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Has a lot more fins than my half scale 6S too Steve. Will be looking forward to seeing more on the engine progress!!
Bill
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So Steve does this mean we going to finish the mini? :stickpoke:
:popcorn:
Don
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So Steve does this mean we going to finish the mini? :stickpoke:
:popcorn:
Don
Probably not, i just got bored. Tomorrow I am going to by buds house to hone the other V8 block. I will focus on that most likely.
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Sometimes when something is scaled down some of the detail will be lost to make the piece doable. The original block has 8 fins. This one will only have 7. I had to sacrifice a fin to allow room for a cutter with enough reach to get to the depth required to cut out the fins. Should know if it worked in a few days.
Little bit more.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2099s.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2100s.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2101s.jpg~original)
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This is bringing back some memories Steve, nice start on the block and I am definitely following along.
Bill
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Watching patiencently for the block to come to life and you know some time we do what we have to do.
:popcorn:
Don
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Thanks. I have been working on my procedure for a while as far as how to hold it to do the sixth side. I have a plan but won't know if it will work out until I get there
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Tested some code on a test block. Not bad. I added some lines to see if I can smooth out the shelf under the fins. We shall see.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2104s.jpg~original)
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That is looking fantastic Steve!!!!
Bill
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That's some magnificent metal carving :praise2: :praise2:
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Cool Steve, and I think you got it bud. :pinkelephant:
8)
Don
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Thanks for the thumbs up. I hope to do the opposite side tomorrow.
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Side 2 code for the mill is tested. I had a little crash so the finishing passes were not complete but the problem has been corrected and I'm on to side 3. I guess that's why we test. When the code is complete I am going to try to make 3 cases. There will be about 15 hours each to cut so I think the extra debug time is worth it.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2105s.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2106s.jpg~original)
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Steve, I like.............................. :Love:
Don
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Incredible, the last shot is evocative of some sort of futuristic building. Fantastic, Steve. I remember this thread from a long time ago, great to see it resurrected. Cheers, Hugh.
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Steve,
The engine is looking great, how big was the chunk of aluminum before you started whittling it down?
Art
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Nice work Steve!
Dave
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Thanks everybody
Art
1.550
2.458
3.250
I have 3 blocks started that are within. 002 in every direction. Starting with a standardized block allows me to do all my cad work from center of cylinder or stock surface which ever is easiest. When I'm finished there will be 9 separate gcode files for the crankcase of both 2D and 3D. The test block was. 006 out in one dimension so it drew the short straw. Good thing though, I would have scrapped a few without the test block
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Nice work, Steve. Did you use a CAM program or develop the g-code yourself?
Chuck
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Hello Chuck!
Hope your feeling well. I use CamBam. Works great in 2 and 2.5D work. I like it because it just plain works. I had to go to the forum once for help in the 5 years I have been using it. Turned out that the dxf file was the problem. Turns out the only problem with CamBam is ME. Hahaha!
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Doing well, Steve, thanks. I've been using CAMBAM as well now for close to a year, I guess. I don't get too fancy with it, but, as you say, it just works.
Chuck
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Well I have all 9 programs complete, debugged, optimized, and ready to go. There are some unavoidable things I will have to live with but I think the finished product will be nice with a little hand work to smooth out the spots where the programs overlap. All the little "bad" things you see have been addressed and with a good setup I should be able to minimize the rest of the tool marks. The next one should be a big improvment over what you see here.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2113s.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2114s.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2115s.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2116s.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2117s.jpg~original)
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You've gotta love it when a plan comes together. Or 9 of them.
--Tim
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Steve, that is just amazing and much smaller than I had thought seeing it next to the drink can. I like the fact that you left the one side of the crankcase open to do the internal machining. That sure makes things easier. If I were doing it again (manually) I would go that route as well.
Bill
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Hi Steve, I like it. It will push me to use CNC more often and also to think more intensive about the 4th axis. The space in the housing and the hole for the socket is already prepared.
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Big improvement, hell Steve if if looks any better I wouldn't be able to stand it. Awesome buddy just awesome..................... Did I say.............. I like.................. :Love:
:drinking-41:
Don
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Great progress Steve,
As the other have said; I didn't realize that it was so tiny! It will be fun to watch it take shape. Have you given any thought on how you are going to create the fan shroud?
Dave
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Thanks everyone. Tomorrow I will start on the "real" cases. The open sided case is the original design. I thought they were all like that.
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Steve, looks great. A couple of questions if I might... Did you use Cambam to form the curved edges of fins? Did you mill down from the top? Also, when hogging out the inside of the crankcase, what size end mill did you use, what was your depth increment, and feed speeds? I've always been pretty conservative with these values. When using a 1/4", 2 flute end mill in aluminum, I usually restrict the depth increment to no more than .040" and the feed rate to 6 inches per minute.
Chuck
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Reminds me of the Dino The Dinosaur soap you used to get at the gas station, you rubbed it enough and Dino came out. Bubba, you rub on a piece of ali and an engine comes out. Darn nice :ThumbsUp: :ThumbsUp:.
Eric
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Chuck:
I put together a spreadsheet to calculate feed/speed in the common materials I normally use. It's attached FYI. The lower areas include the raw data from Machinery's Handbook. The first lines include the speeds my mill can run at, and the feed and speed for each material/end mill size. These are the "advertised" speed and feed, i.e. rigid machine with flood coolant. I usually run somewhat under these in feed, either in the code or at the machine using mist coolant. Be forewarned, no warranty is given for the data nor calcs.
For depth of cut I usually run up to half the end mill diameter.
So for your 1/4" end mill, I'd run some 9 or 10 in/min (with my mills max speed of 2720 rpm) and a depth of maybe 0.1". A higher spindle speed would help, but alas my mill is limited.
i'll be interested to hear of others calcs and experience.
Thanks.
Hugh
Also, when hogging out the inside of the crankcase, what size end mill did you use, what was your depth increment, and feed speeds? I've always been pretty conservative with these values. When using a 1/4", 2 flute end mill in aluminum, I usually restrict the depth increment to no more than .040" and the feed rate to 6 inches per minute.
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Thanks for the info Hugh. Unfortunately my mill is not rigid enough to make the kind of cuts a normal mill can make. Mine is home built and not a conversion.
The fins were cut and profiled while the block was on its side. The entire side was done in one setup with 2 CamBam files.
I cut with a 1/8 endmill at .025 steps and 60% stepover 25 IPM. Seems crazy but I take more material that way than the 1/4 inch with much less flex in the head.
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Thanks for the info Hugh. Unfortunately my mill is not rigid enough to make the kind of cuts a normal mill can make. Mine is home built and not a conversion.
The fins were cut and profiled while the block was on its side. The entire side was done in one setup with 2 CamBam files.
I cut with a 1/8 endmill at .025 steps and 60% stepover 25 IPM. Seems crazy but I take more material that way than the 1/4 inch with much less flex in the head.
Steve:
Yep. The advertised feed/speed numbers are for production. I think backing off some helps with tool wear, but I could be wrong. And it does get crazy with larger end mills and hobby equipment. On the other end, I need to build that auxiliary add on high speed spindle for small end mills. What speed are you using with the 1/8" end mill? Two flute?
Are you using the 3D processing in CamBam? I see it's now there but haven't tried to cut anything with it. I'm wondering if it's worth delving into or not.
Also, a great build. Thanks for taking us along on the journey.
Hugh
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25 Ipm and 025 steps 60 percent overlap roughing and 40 percent on a finish pass
The side profile was done in one setup using 2d on the lower half and 3d on the upper fin area.
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Steve, the only way I know of to do 3D pofiling in CamBam is with an .STL file input. Is that what you did on the curved section of the fins?
Chuck
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Steve, the only way I know of to do 3D pofiling in CamBam is with an .STL file input. Is that what you did on the curved section of the fins?
Chuck
Yes Chuck. Yesterday I sent an email to you with the cambam files attached to cut the right side. They will best show you how I setup the side. If you don't have it I might have an old address. If you don't have it PM your most recent address and i'll resend.
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Yes Chuck. Yesterday I sent an email to you with the cambam files attached to cut the right side. They will best show you how I setup the side. If you don't have it I might have an old address. If you don't have it PM your most recent address and i'll resend.
Steve, I did get the email, I just hadn't looked at the attached files. Thanks!
Chuck
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Amazing work on that crankcase, Steve. I have no plans for moving into CNC world, but I can certainly admire what you are doing.---Brian
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OK gentleman, heres the real deal.
Cut the top first
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2101s.jpg~original)
Then the bottom
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2100s.jpg~original)
Left side lower
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/Step3-2.jpg~original)
Left side fins
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/Step4-2.jpg~original)
Right side lower
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2142.jpg~original)
Right side fins
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2145.jpg~original)
Rear of case minus the timing gear house.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2151.jpg~original)
Rear timing case.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2153.jpg~original)
Entire front
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2160.jpg~original)
And there you have it
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2162.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2163.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2165.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2168.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2171.jpg~original)
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What was the total machining time Steve? Sure looks great from where I sit!!
Bill
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What was the total machining time Steve? Sure looks great from where I sit!!
Bill
Right around 7 hours not counting tool change time.
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Hi Steve, very interesting. I will wait for the next steps.
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That's not bad at all, considering what it would have taken manually...measured in days not hours :) For me anyway.
Bill
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Dam Steve, you just had to put it on the frame didn't you. :lolb: that is just to cool bud and .....I like.......... :Love:
Don
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Fantastic giant bookshelf you made to make the bike look like it was scaled down! Amazing work, Steve.
Mosey
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Now that's some major "WOW". OK, so I gotta know, what do you remember the most : the blisters from the rope kicking back or the burn on the inside of your thigh from the muffler :lolb:? Damn nice Bubba :ThumbsUp: :ThumbsUp:
E
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Steve,
Amazing work. I need to figure out Cambam to do more than simple shapes. I am a long ways from what you are doing.
Keep the build log coming, it inspires the rest of us.
Mike Nay
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Excellent work as ever :praise2: :praise2: I'm still following along :wine1:
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Thanks everybody.
Mike if there is anything I can help with pm and I'll give it a try.
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I have made a prototype side cover. There are a few things that I am not happy with but the Gcode has been updated and I should be able to make 2 nice ones tomorrow.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2177s.jpg~original)
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OH man! I want one...........Steve that is just the coolest thing I have ever seen. I can't wait to see this thing running on the frame. Did I say ...............I like............ :Love:?
Don
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Did I say ...............I like............ :Love:?
Don
You may have mentioned it! :lolb:
Thanks Don!
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Steve- Veeerrrrry cool build. When we were kids, these were the envy of everyone without one. Can't wait to see the small bits like the starter cord, clutch and carb being made. Late to this thread but now will follow along closely. Curious if you are planning to sleeve the block or run on aluminum bore....may have been mentioned but apparently missed it. Well done sir! Paul
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I'm going to sleeve. Steel sleeve, aluminum piston, cast iron ring.
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Watch the compression ratio and timing, that rope kick back can be a killer :lolb: BTW, has anybody told you, "I like............. :Love:". Darn good stuff Bubba.
Cletus
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:ThumbsUp: :ThumbsUp:
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Some progress today!
I started with a piece of 1/4 inch plate and machined the back side so that when the part is complete the back would have a nice finish for paint.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2191s.jpg~original)
Into the vise with the good side down the inside is machined out and the mounting holes drilled.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2193s.jpg~original)
I call it a fixture but it's just flat stock with 2 holes drilled and tapped. The part is bolted to it for machining.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2195s.jpg~original)
The outside profile is then cut
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2198s.jpg~original)
On the same piece of material a second fixture is made. 2 holes and a pocket to clear the piece so the rear can be accessed.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2200s.jpg~original)
Then some small cuts are made to fonish the back.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2202s.jpg~original)
Still needs a few details but it's 95% done.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2204s.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2206s.jpg~original)
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Whooa - it looks very nice so far Steve :pinkelephant:
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Looking fantastic Steve. Glad you are back working on this project. It's going to be a real crowd pleaser since so many of us remember these from our younger years :)
Bill
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Oh Boy! :pinkelephant: Steve is back and looking right fine to bud. Another part to a great project and another fantistic photo of the bic.................. :ThumbsUp:
:popcorn:
Don
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Steve:
Nice.
Is that a Corian, or similar, block you're using for tooling?
Thanks.
Hugh
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Steve:
Nice.
Is that a Corian, or similar, block you're using for tooling?
Thanks.
Hugh
Yep. Corian makes a great fixture if you are only using it a few times. Threads will strip out eventually but if you are making 25 or less it works great.
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Hi Steve, a nice part. CNC is a good tool to make parts with this kind of shape. Waiting for your next parts.
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Managed to squeeze this in before rebuilding the bath tub faucet and painting 3 bedrooms. The original engine had a magneto triggered by a magnet on the flywheel. I am going to go with the CDI board. The bracket in the photo will hold the hall sensor and give me a little bit of adjustment.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2208s.jpg~original)
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Steve,
That B&S is looking good.
Art
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Managed to get some time Sunday so I made a muffler.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2217s.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2215s.jpg~original)
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Nice! :ThumbsUp:
Dave
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That's just to cool Steve......... :ThumbsUp:
8)
Don
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Excellent. After it gets all rusty, it'll really look original.
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Hi Steve,
I've been waiting for an update. Thanks buddy. Now I want more!
gbritnell
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I love the muffler Steve. Did you make it out of stainless ? Also glad to see an update on this project.
Bill
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I love the muffler Steve. Did you make it out of stainless ? Also glad to see an update on this project.
Bill
Nope! Just a piece of steel bar. Not sure what it is. It will all be painted white so I just used what would hold up to the heat.
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Thanks Everybody!
Missed you at Zanesville this year George. I was hoping to get my mitts on that flathead. Now i'll have to wait until NAMES?
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Saweeeet!!!
Looking good bud!
Dave
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Started on the flywheel. Almost done cept a little drilling.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2225s.jpg~original)
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2223s.jpg~original)
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That's coming together great Steve and the flywheel look very authentic!! One of the virtues of CNC, I couldn't get the nice airfoil shape on the fins like you did. Nice to see an update on this one as always.
Bill
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Not a big deal but I managed to make and install the cylinder liner. After pressed in, it was machined down to allow the fuel to flow from the valve area into the cylinder and to match the top of the crankcase.
(http://i770.photobucket.com/albums/xx349/stevehuckss396/Minibike/DSCN2227s.jpg~original)
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That is really starting to take shape but when did you make the crank or did I miss something? Awesome Steve just awesome......... :praise2:
Don
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That is really starting to take shape but when did you make the crank or did I miss something? Awesome Steve just awesome......... :praise2:
Don
Hello Don. Thats an allen wrench. Crank is coming soon.