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A question about homing
« on: January 09, 2020, 01:59:10 PM »
When mach 3 homes an axis , it'll move  until it tripps the switch . 
And then it 'll back off until it trips again or untrips and calls that position home .


Is it possible to make mach3 back off a little further off the home switch .
Something like 0.5mm . 

I have installed magnetic switches and they work absolutely perfect .
But they're so sensitive that sometimes with the axis just backed off enough to untrip
the switch , it'll triiger it again after it's homed .
Fi assume the z axis homed , then it'll start homing on the Y axis .
Sometimes the movement of the homing Y axis will trip the Z axis switch again wich then acts as a
limit causing an E-stop . Backing off a little further would solve that

pat





Re: A question about homing
« Reply #1 on: January 09, 2020, 03:04:32 PM »
Hi,

Quote
Is it possible to make mach3 back off a little further off the home switch .
Something like 0.5mm .

Mach does not do that however some motion controllers do offer that feature, I think the UC series and PoKeys boards do it.

Another alternative is the have Mach home normally and then have a script which drives the axis to your desired 'back-off' position.

Craig
My wife left with my best friend...
     and I miss him!
Re: A question about homing
« Reply #2 on: January 10, 2020, 03:14:58 AM »
Yes but that's not possible .
The error ,if you 'de call it that ,occurs during the homing process .
One axis is homed  , the second one starts and then the first goes into limit . 
So the machine goes into e-stop before the sequence finishes .

If the error doesn't occur , wich most of the time it doesnt ,
I can easily jog off the switches and then I'm good .

So it should be something like

Home Z
Homing done ? 
G00 Z-0.5
Home Y
Homing done ?
G00 Y0.5
Home X
Homing done ? 

homing finished .