Author Topic: Zee Needs Popcorn  (Read 57397 times)

Offline zeeprogrammer

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Re: Zee Needs Popcorn
« Reply #300 on: August 20, 2018, 04:51:47 PM »
Thanks Dave. Very helpful!
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline Craig DeShong

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Re: Zee Needs Popcorn
« Reply #301 on: August 21, 2018, 01:59:27 AM »
Nice job Zee, you'll be "teach'in the class" before long !
Craig
The destination motivates us toward excellence, the journey entertains us, and along the way we meet so many interesting people.

Offline zeeprogrammer

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Re: Zee Needs Popcorn
« Reply #302 on: August 21, 2018, 11:18:26 PM »
Nice job Zee, you'll be "teach'in the class" before long !

Thanks. My 'long' is measured in eons.  ;D Or something a little less.

Did some more work on the crosshead guide. So far...so pretty good.

1st pic shows set up for marking. I don't have a chuck for my spindexer.

So marking went great but then I had to put it in the vise and lost all reference. I used the height gauge and went back and forth from one side to another until I rotate it to 'close enough'.

2nd pic shows the milling out of one side.

3rd pic shows milling the rounded corner. The downside of doing it this way (as I found out) is the metal gets pushed out and over the line I was going for. It was hard to know when to stop. I could have done one of two things. a) Milled from the other side so the cutter goes 'into' the mark. I would have needed a mirror to see that. b) I could have set the mill to just touch and used the DRO. But I'd still have a bunch of metal pushed out that would need filing.

4th pic shows this step done. A little filing and things cleaned up pretty well. I don't know if I reached the target for the rounded corner but it looks pretty close and it won't matter.

You might notice I redid the transition from the smaller outer diameter to the larger outer diameter. It really bugged me but it was pretty easy to correct.

You might also notice a step change, rather than a smooth transition, from the smaller inner diameter to the larger inner diameter. I didn't have an appropriate cutter to do that but more importantly I couldn't see it and didn't want to rely on my measuring. I'm probably going to leave as is but there's a chance I might be able to improve it later.

Whether this goes bad or not...at least I know how to get this far.  ;D

[EDIT] You'll also see the far end's inner diameter looks much smaller. I got there drilling but the boring bar couldn't and didn't need to. All of that gets milled away later.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline Tennessee Whiskey

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Re: Zee Needs Popcorn
« Reply #303 on: August 21, 2018, 11:27:11 PM »
Nice stock removal Zee  :ThumbsUp: :DrinkPint:

Eric

Offline b.lindsey

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Re: Zee Needs Popcorn
« Reply #304 on: August 21, 2018, 11:35:34 PM »
Looking good Zee  :ThumbsUp:

Bill

Offline crueby

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Re: Zee Needs Popcorn
« Reply #305 on: August 22, 2018, 12:00:16 AM »
Nice job!
 :popcorn: :popcorn:    Hmmmm, 'eons'? Better order more popcorn...    :popcorn: :popcorn:

Offline Dave Otto

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Re: Zee Needs Popcorn
« Reply #306 on: August 22, 2018, 12:41:51 AM »
Nicely done Zee!


Dave

Offline Brian Rupnow

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Re: Zee Needs Popcorn
« Reply #307 on: August 22, 2018, 12:55:01 AM »
Looking good so far Zee. there are a lot of steps and set-ups in that cross head guide.---Brian

Offline 10KPete

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Re: Zee Needs Popcorn
« Reply #308 on: August 22, 2018, 04:28:29 AM »
That looks great, Zee!  :whoohoo:

Pete
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Offline propforward

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Re: Zee Needs Popcorn
« Reply #309 on: August 22, 2018, 01:52:44 PM »
This is a fascinating build. Zee - where does one obtain these plans? I'd love to look them over more closely.
Stuart

Forging ahead regardless.

Offline zeeprogrammer

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Re: Zee Needs Popcorn
« Reply #310 on: August 22, 2018, 02:21:22 PM »
Thanks guys!

Zee - where does one obtain these plans? I'd love to look them over more closely.

I'm working off plans from sbwhart. He kindly sent them to me after I PM'd him.
He also wrote an article that's been very helpful.
https://drive.google.com/drive/folders/1Omkz-60W-WmwYr0IBxVTaVOc8tXohgns

Julius also posted a scaled up version in the plans section. (I can't find it off-hand.) It has been useful as well.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline propforward

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Re: Zee Needs Popcorn
« Reply #311 on: August 22, 2018, 02:58:24 PM »
I will search - thank you!
Stuart

Forging ahead regardless.

Offline zeeprogrammer

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Re: Zee Needs Popcorn
« Reply #312 on: August 22, 2018, 07:19:04 PM »
Sweet. Barely a hint of bitter.

Finished the crosshead guide today. That was quite a bit of fun and I'm pretty happy with it.
I'm not sure of one dimension. Assembly will tell me if I have an interference.
Hopefully that hard transition from the smaller inner diameter to the larger inner diameter won't be a bother.

1st pic shows the other side getting milled out in preparation for rounding the corners.
2nd pic shows the other side's slot done. Used a 5/8 and a 3/4 end mill to do the corners.
3rd pic is basically the same process but used a boring bar to the 1.5" diameter corner I needed.

The last 3 pics are different views of the finished part.

Holding the part for various operations was interesting. Sometimes I packet the sides. For some operations I put a 5/8 boring bar inside so I wouldn't crush the part in the vise.
I used aluminum. If I do this kind of part again then I have a bit more confidence to use steel.

I couldn't have done it without Stewart Hart's article in Model Engineer.

I'll be playing with that part all evening.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline b.lindsey

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Re: Zee Needs Popcorn
« Reply #313 on: August 22, 2018, 07:49:21 PM »
Beautiful looking part Zee. And not an easy part to do by any means. Nicely done!!

Bill

Offline crueby

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Re: Zee Needs Popcorn
« Reply #314 on: August 22, 2018, 08:00:55 PM »
Very nice!!  Quite a complex shape, looks great!


 :popcorn:

 

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