Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: jordie1944 on April 20, 2008, 03:00:14 AM

Title: Ref all Home
Post by: jordie1944 on April 20, 2008, 03:00:14 AM

When I ref all home, the x and y axis move to the home switch a back off a small distance which is noticeable.
The Z axis moves to the home switch but there is no visible back off.

Is this normal?

Thanks Mike

Title: Re: Ref all Home
Post by: Hood on April 20, 2008, 03:24:50 AM

What is your  Z axis Steps per unit set to? Is your Z Axis on ful step or half step by any chance?
Hood

Title: Re: Ref all Home
Post by: jimpinder on April 20, 2008, 04:24:35 AM

Also have a look at the Z DRO - does it move. It could be you have backlash in your Z axis, and the movement is taken up by this. Cut down the speed of the homing, and this will make it clear what moves where - it might be better to cut of the auto-zero as well while you check it out.