Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: bigal11 on January 22, 2016, 11:38:52 AM

Title: Z limit switch triggered
Post by: bigal11 on January 22, 2016, 11:38:52 AM

Hello all,
I'm having some trouble with the z axis limit switch being triggered when i start a toolpath. I set my home limits. everything is fine. When i start a toolpath the spindle moves up untill it hits the limit switch, stops and then i have to press reset to continue the toolpath. I tried debounce up to 5000 with no luck. This has only been happening for about a month now.
Any help would be appreciated.

Al

Title: Re: Z limit switch triggered
Post by: ger21 on January 22, 2016, 12:21:59 PM

Your g-code is probably sending it into the switch. Probably with a G43.

Title: Re: Z limit switch triggered
Post by: bigal11 on January 22, 2016, 12:40:57 PM

Thanks
I notice 1 of first lines has a G43 H1 Z.25
How do I correct this?

Title: Re: Z limit switch triggered
Post by: ger21 on January 22, 2016, 12:49:18 PM

Are you using tool length offsets? If not, delete the line.

Title: Re: Z limit switch triggered
Post by: bigal11 on January 22, 2016, 01:22:22 PM

I tried deleting that line.
The toolpath doesn't even make it to that line. It trips the limit switch on the preperation move.
I went back over some previous items and they all have a line with G43.
At a loss still.

Al

Title: Re: Z limit switch triggered
Post by: ger21 on January 22, 2016, 01:36:13 PM

What preparation move? Something in your g-code?
Sounds like your g-code is just telling the Z to go too high. Probably a setting in your CAM software.

Title: Re: Z limit switch triggered
Post by: bigal11 on January 22, 2016, 01:59:04 PM

I'll have a look at that route and post any results. tks

Title: Re: Z limit switch triggered
Post by: ostie01 on January 23, 2016, 03:43:54 PM

What is the lenght of the tool in your tool table?

Jeff