Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: sigmatero on October 18, 2016, 12:45:01 PM

Title: homing
Post by: sigmatero on October 18, 2016, 12:45:01 PM

I am use to homing the machine by hitting Home and then the axis will go to the home switch, stop, go backwards slowly, then go forwards slowly to hit switch again.  This makes an accurate home limit.  

My question:  is this function controlled by Mach3 or by the machine board?  In other words, does Mach3 give the board commands to do this (move fwd, move backward, move fwd again) or is it automatically done by the board when Mach3 gives it the home command?

Title: Re: homing
Post by: Davek0974 on October 18, 2016, 02:17:58 PM

AFIK, which isn't much ;) it's all done by Mach.

Title: Re: homing
Post by: Hood on October 19, 2016, 02:53:13 AM

By your description of the sequence it is your controller that is doing it.
Hood

Title: Re: homing
Post by: stirling on October 19, 2016, 04:36:37 AM

AFAIK, homing is one of the "real-time" actions like limits or probing etc. so HAS to be done by the controller.

FWIW, your description does not match the way homing is "normally" done.

Actually I suspect your description of the homing sequence is incorrect because if it worked as you say it does then you wouldn't be able to share limit and home switches.