Recent content by Holt

http://www.aliexpress.com/premium/angel-eyes.html?ltype=wholesale&SearchText=angel+eyes&d=y&origin=y&initiative_id=&isViewCP=y&catId=0 Here they are in all sizes. Holt

Just saw this and remembered when I was toying with a BMW K1200 16V motorcycle head on a classic Mini engine, the BMW cams was with flat flanks as well, and it was possible to run the cams in opposite direction without problems. I'm afraid this was the best picture I could find. The engine...

How would you control the stepper speed 100% with that? If it takes lets say 10 minutes to cut a 50 tooth gear, if the stepper is off by half a revolution by the end of that time, you end up with a helical gear in stead of a straight cut, that kind of precision can't be achieved with a potmeter...

It is to synchronise the speed at the mill spindle with the speed of the index spindle for gear hobbing, see the Youtube video in answer #38 It would be a very nice extra feature Holt

You got your math wrong, the 158.75 revolutions is per second, so 158.75 times 60 = 9525 rpm Holt

The link doesn't seem to work. The stepper motor speed at 400 rpm is more than adequate, I wouldn't imagine a spindle speed over 250 rpm with a gear hopper, if you cut a 10 tooth gear, the indexer should rotate at 25 rpm, if the indexer is geared to the stepper at 5/1, the stepper speed would be...

I haven't posted for quite a while, but recently I got a mill, and have been looking for a dividing head for it, then I came across Chuck Fellows Arduino powered head, and fell in love immediately. I really appreciate that someone take the time to make a "how to" for this project, but I wondered...

For some years I have been earning my living by laserwelding broken parts for plastic injection moulds, The factory I work at is placed a few hundred meters from the main mould factory at the LEGO company in Billund Denmark, so I have done a lot of welding at there moulding parts. a few years...

Without Pictures it never happened :D

Well, I went for Yuriy's brilliant TouchDRO and I am using a rotary encoder for the main slide, first reason because I have it, and second reason because it is easy to use with the TouchDRO system, I was afraid it wouldn't be possible to implement into a DRO controller, but with this setup you...

You are most welcome, but I would like to tidy it a bit up before you post it, I will mail you the result in a couple of days. Holt

You mean like this? Holt

I have been playing with EAGLE, does this seem right, I am a bit in doubt about the supply at the LM339 at pin 1 - 2 - 13 and 14, it have been a couple of years since my last play with EAGLE, so I am a bit rusty. Holt

Thank you very much, your help is much appreciated, I will try to draw up something in the near future and post it here. Holt

As swifty said, the knurling tool is a industrial grade tool too expensive for most hobby machinists, the pic was taken at work where I was turning a part on our Shaublin 125, that was before I got my own lathe. I just ordered the TI MSP430 Launchpad that should be here in a few days, and the...