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spindle encoder?/
« on: August 02, 2007, 09:53:36 PM »
forgot to ask. what kind of encoder or what do people use to do cnc lathe thread cutting?
Chris

Offline jimpinder

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Re: spindle encoder?/
« Reply #1 on: August 03, 2007, 04:21:34 AM »
If you look at the video tutorials, Artsoft say that a one pulse per rev encoder is sufficiently accurate and recommend something similar to the Omron SD 5B.
Not me driving the engine - I'm better looking.
Re: spindle encoder?/
« Reply #2 on: August 03, 2007, 08:10:33 AM »
hmmm. Im doing a search of the Omron site and am finding no such part number.
any one got a link to one.

Offline jimpinder

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Re: spindle encoder?/
« Reply #3 on: August 04, 2007, 04:57:11 AM »
I looked as well and couldn't find the number quoted - can anybody enlighten us ???
Not me driving the engine - I'm better looking.

Offline DAlgie

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Re: spindle encoder?/
« Reply #4 on: August 04, 2007, 10:49:46 AM »
I used PDMX's spindle sensor, but see now that it's discontinued. You can just use a proximity sensor for this, possibly not use a metal disc with a cutout on the spindle, but a tab. But that might just be the NO/NC part reversed, I don't know. I had big problems with interference with mine for awhile, spindle would read in the millions of RPMs, Bob Campbell suggested I use a small capacitor across the signal lead and to ground. That fixed 90% of the problems, last one was I had the signal wire going into the power supply/ Gecko/ BOB box, and the wire was close to the torodial transformer. Tywrapped it up away from the trans and all was good.
                          DaveA.

Hood

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Re: spindle encoder?/
« Reply #5 on: August 04, 2007, 11:02:32 AM »
« Last Edit: August 04, 2007, 11:04:41 AM by Hood »

Offline jimpinder

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Re: spindle encoder?/
« Reply #6 on: August 04, 2007, 04:06:36 PM »
Could you send me a schematic of your set up, it sounds to be just what I want. I take it when you say you did a little work with the soldering iron, it was some sort of transistor circuit to link into the 25 pin parrallel port ??

From that I assume I can make two, one for my milling spindle and one for my lathe spindle (they both work from the same motor, but the gearing is different.)

jimpinder@tiscali.co.uk or post it on here and we can all download it.

Jim
Not me driving the engine - I'm better looking.
Re: spindle encoder?/
« Reply #7 on: August 05, 2007, 08:27:59 AM »
I always seem to have trouble locating someone to give my money to when I embark on these adventures. anyone know the website of a good vendor for said "fairchild semiconductor, Phototransistor reflective object sensor"
Chris
Re: spindle encoder?/
« Reply #8 on: August 05, 2007, 09:31:54 PM »
welp never mind. actually found it.  :P

Offline jimpinder

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Re: spindle encoder?/
« Reply #9 on: August 06, 2007, 12:40:32 PM »
don't keep us in suspense - who did you find
Not me driving the engine - I'm better looking.