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Author Topic: Frustration! Accurate homing? Encoder index pulse?  (Read 10093 times)

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Hood

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Re: Frustration! Accurate homing? Encoder index pulse?
« Reply #10 on: August 13, 2007, 02:20:51 AM »
You got it wrong ;)
 Basically what happens is Mach goes to home, the limit is triggered but Eds board doesnt tell Mach, the Index is hit and now Eds board tells Mach the limit has been triggered, Mach reverses and then Eds board counts the distance you have set by dip switches and then tells Mach the limit is now closed, homing complete.
Hood

Offline poppabear

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Re: Frustration! Accurate homing? Encoder index pulse?
« Reply #11 on: August 13, 2007, 03:31:54 AM »
Yeap, what Hood said, it is all done in Eds board.
Commercial Mach3 & Mach 4, Design/Build/Retrofit CNC and Industrial machines.
http://www.ss-systems-llc.com/
Re: Frustration! Accurate homing? Encoder index pulse?
« Reply #12 on: August 13, 2007, 03:38:50 AM »
Exactly which board is it that reads the index pin of an encoder?
The documentation I've found shows the index pin un-wired.
Searching through the PDF, the word "index" is never mentioned once. 
Re: Frustration! Accurate homing? Encoder index pulse?
« Reply #13 on: August 13, 2007, 03:43:30 AM »
Wait, Sorry I got hung up on the page.  Pretty sure we are "on the same page now." ;)
Re: Frustration! Accurate homing? Encoder index pulse?
« Reply #14 on: August 14, 2007, 04:30:59 AM »
Ok Thanks, I understand the operation of the Home Index board from http://www.cncbuildingblocks.com/homeindex.html

Theoretically, if Mach could "see" an index pulse, would it be possible to get Mach to do the hunt and seek for an index home?

(Where possible, I'm all for doing things in software vs hardware.)

THanks, Ted

Ps. Just tried loading the Mach3 demo. And I'm sorta missing some functionality of Mach2 (standard screen set anyway).
Like, Why can't I use the number pad on my keyboard on select fields???????????
Is it possible to run Mach3 with just a Keybaord? (no mouse or touchscreen).
Is the standard Mach 2 screen set available for Mach3?
The jog button behavior seems different.
Home all 3 axis at once?

Are these screen set differences or Mach2 vs 3 differences?
« Last Edit: August 14, 2007, 04:33:09 AM by Erichtg »

Hood

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Re: Frustration! Accurate homing? Encoder index pulse?
« Reply #15 on: August 14, 2007, 02:15:53 PM »
I would think they are screenset differences. You can set up hotkeys for every button on the screen in screen4 but most will have hotkeys already assigned so probably best to leave them alone and just look to see what they are.

Hood