Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: robtazi on April 10, 2019, 02:35:01 PM

Title: My Y axis doesn't retract far enough off the limit to continue to my next axis.
Post by: robtazi on April 10, 2019, 02:35:01 PM
My y axis doesn't retract far enough to release my micro switch when homing. Any ideas? Mach 3 running on Windows 10 and and Rain smart cUSB controller.Sorry if it's silly.
Title: Re: My Y axis doesn't retract far enough off the limit to continue to my next axis.
Post by: reuelt on April 10, 2019, 03:29:27 PM
3 things
1. Increase your debounce to 50 or more. Top right hand corner of config |general config
2. Add  soft limits so that tool head will slow down when it is near the switch. Soft limits is 0 to 0.1" before reaching the far end limit switch.
3. Add 2 ferrite sleeves to your USB cable
Title: Re: My Y axis doesn't retract far enough off the limit to continue to my next axis.
Post by: joeaverage on April 10, 2019, 05:06:51 PM
Hi,
can you tell us more about the controller, make and model?

Do you have microswitches or proximity sensors for home switches?. Proximity sensors tend to have not enough
hysteresis for home switches.

Craig
Title: Re: My Y axis doesn't retract far enough off the limit to continue to my next axis.
Post by: reuelt on April 10, 2019, 05:29:58 PM
Hi,
can you tell us more about the controller, make and model?

Do you have microswitches or proximity sensors for home switches?. Proximity sensors tend to have not enough
hysteresis for home switches.

Craig
I guessed it is
https://www.sainsmart.com/products/4-axis-cnc-mach3-usb-motion-controller-card-interface-breakout-board.
He misspelt Sain smart as "Rain Smart".
Title: Re: My Y axis doesn't retract far enough off the limit to continue to my next axis.
Post by: robtazi on April 12, 2019, 09:08:39 AM
I'm using microswitches. And running a Smart Said USB controller board. I fought with a smooth stepper ESS board and could not get it to work. So I ended up with the Smart Said.
Title: Re: My Y axis doesn't retract far enough off the limit to continue to my next axis.
Post by: ger21 on April 12, 2019, 10:06:22 AM
You have switch bounce or noise triggering your switches.
Title: Re: My Y axis doesn't retract far enough off the limit to continue to my next axis.
Post by: joeaverage on April 12, 2019, 01:37:51 PM
Hi,
the ESS (if genuine) is a very much better board. What was it that you had trouble with?

Craig