Gsender Toolchange wizard sends Z-Axis past physical limits

Hello, Im having an issue while using any of the tool change wizards, particularly the fixed tool probe option, but all share the issue. While running or starting a file, It will pause at m6, allow me to probe old and new tool, but after probing, before allowing me to resume cutting, it will send the Z-Axis all the way up until it hits either soft limits, hard limits (limit switch) or until it just cant if those are disabled.

is there a way to tell gsender what z value it should return to during this process? it appears as though its attempting to send the z axis into a positive value, which is up past the machines homing limits.

any help would be greatly appreciated

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As I understand the M6 is a firmware macro, so this should be in there somwhere, how you edit it i really don’t know. i want to change the speed on the probing on mine.

Having the exact same issue with fixed tool probe. Haven’t had any luck on a fix .


Ok I think I’ve found the issue in gsender firmware , $13 needs to be disabled . I believe grbl is converting mm to inches , causing the z to trigger slams or estop if they’re turned off .
See pic

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You can change the speed in gsender . Top right corner click on firmware .

I just got a chance to check this. This did, in fact seem to solve the problem for that issue. Thanks!!

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@WaddabuxX Which of @Gravesj1s 's suggestions solved your issue? I would like to mark the solution for others going forward. Tks.

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@gwilki ,

In gsender , firmware $13 [ report in inches] needs to be turned off . It’s a work around for a bug in the firmware .

@Gravesj1s tks much. I’ll close the topic.