Quick-step

[Bjorn_B]

No, I'm not refering to the shuffling of feet to and from at the dance hall, but rather the milling attachment designed by John Payne. This has in the past been avaliable from hemmingway in bouh a kit form and as a complete machine as I understand it. At quite a cost to be fair..

However, I have dug out the issues of mew where it was serialised as a construction article and I am now thinking of building one. Currendly I am at the stage of proofing the drawings in cad (allways a worthwile process) and I have allso sourced a piece of aluminium rectangular box tubing allbeit in metric dimensions for the gearbox housing (could not find 2 1/4 x 3 3/4 x 3/16 anywhere.

Any input on this is most welcome

[steamer]

I've always been interested in that piece.    I'll be following along.

Dave

[Bjorn_B]

Thanks Dave!

I will plug along bit by bit, allthough not much will happen for a few weeks

[Jasonb]

My Friend KWIL has made one of those, couple of photos in his album on ME Forum, there is quite probably a thread on teh forum too. He almost lost it when it was given to someone who was meant to be collecting one of my engines as another person mixed up the boxes

http://www.model-engineer.co.uk/albums/member_photo.asp?a=10743&p=224797

[Bjorn_B]

My Friend KWIL has made one of those, couple of photos in his album on ME Forum, there is quite probably a thread on teh forum too

Thanks a lot Jason!

[Bjorn_B]

Aluminium box section for the gearcase arrived from germany today! it's a bit higher at 100x60mm in dimension then the original design, maybe I will cut it down and put a lid on top instead.

The gears will be metrificated as gear cuttters in DP 32 are quite rare and will find little use after this. Will keep the same gear ratios with Mod 1,0 and Mod 0,8 gears instead (20/60 32/32 and 16/48). Centre distance between shafts ends up at the even number of 32 mm instead of 31,75.

Ordered a set of ER 20 collets and gear cutters today.

Hm.. Maybe I should have built that Eureka backing of device..

[Bjorn_B]

Not much have happened so far, getting married got in the way somehow..

Been busy tidying up the drawings from the old MEW Magazines in turbocad, it is allmost done now.

Gearcutters (Mod 0,8 and Mod 1,0) , ER-collets and other bits and pieces are slowly accumulating so I should be get started soon.

[vcutajar]

Congratulations on getting married.

Which issues of MEW are you talking about maybe I have them and can follow and understand what you are doing.

Vince

[Bjorn_B]

Thankyou!

Issues september and october 1998

[Bjorn_B]

Wohoo, something done!

Made the lathe ops on the spindle today, have made a small revision in the bearing setup for this. There will be two bearings at the front with a slight reduction in overhang as a bonus instead of the single bearing and a separate oil seal on the front end. Spindle takes ER20 collets and is made from EN16t, hence the coolant setup..

[Bjorn_B]

Just some milling work left on this (a keyway for the sliding gear and slots for the collet wrench)

[sshire]

For those who have never seen this, here's a link to the complete Hemingway page
http://www.hemingwaykits.com/acatalog/The_Quick_Step_Mill__.html

[Bjorn_B]

Made the spindle body today, most of it anyway.. (Some milling ops to do)

No pictures today as my phone battery died.

Reflection: quite difficult to set up a rectangular piece in the four-yaw at center, twice... Lots of combined efforts with a test indicator, square, soft mallet, twin chuck keys and digital readout. Then it all has to be redone again for the bearings on the other end...

Will post a pic or two tomorrow.

Regards

Björm

[Niels Abildgaard]

Why use gears when VFD/3phase motors exist?

[Bjorn_B]

Why use gears when VFD/3phase motors exist?

not decided on motor options yet, but I do want torque, lots of it!

Might be a smallish brushless setup for the motor (have a 900W/24V dc source in the workshop, more than needed). I still need tourqe from a smallish setup, most suitable d/c motors have a rather high KV