Touch off advice
11 Jun 2020 08:44 #171095
by jools
Touch off advice was created by jools
I'm just setting up tool length touch off on the mill and am pondering ways to do it for multiple tools with a manual tool change.
I use a metal vacuum plate for my jobs and the part's aren't that complex, two sides at most but using a number of tools to finish the part.
Does anyone see a problem with me using the vacuum plate as the Z origin, so Z = 0 on the touch plate? I mainly cut Delrin so having the conductive vacuum plate as zero means it's easy to set tools after each manual change. I could then insert code for this to be done automatically after each manual tool change while still doing each side in one program.
Are there any glaring holes in my logic?
Jools
Addition - My mill is granite based so the frame isn't conductive so the sensor connection is naturally isolated until a tool touch occurs.
I use a metal vacuum plate for my jobs and the part's aren't that complex, two sides at most but using a number of tools to finish the part.
Does anyone see a problem with me using the vacuum plate as the Z origin, so Z = 0 on the touch plate? I mainly cut Delrin so having the conductive vacuum plate as zero means it's easy to set tools after each manual change. I could then insert code for this to be done automatically after each manual tool change while still doing each side in one program.
Are there any glaring holes in my logic?
Jools
Addition - My mill is granite based so the frame isn't conductive so the sensor connection is naturally isolated until a tool touch occurs.
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11 Jun 2020 12:47 - 11 Jun 2020 12:49 #171126
by bbsr_5a
Replied by bbsr_5a on topic Touch off advice
you are on the right way
touching to the bottom is best for you YOU THEN need no Tooltable Length as all are zero
make shure the tools in the G-code are only once to change if possible
you can automate this
by using simple ground and a E-clamp to the bit
then just
G91 ( relative mode for probing)
G38.2 Z-25 F100 ( trip plate on the way down)
or as a Button / Mcode / Key
touching to the bottom is best for you YOU THEN need no Tooltable Length as all are zero
make shure the tools in the G-code are only once to change if possible
you can automate this
by using simple ground and a E-clamp to the bit
then just
G91 ( relative mode for probing)
G38.2 Z-25 F100 ( trip plate on the way down)
or as a Button / Mcode / Key
o<znullen> sub
G91 ( relative mode for probing)
G38.2 Z-25 F100 ( trip switch on the way down)
G90 ( absolute mode)
G92 Z0 (set Z0 )
G1 Z3.5 F150 (move tool free)
o<znullen> endsub
M2
Last edit: 11 Jun 2020 12:49 by bbsr_5a. Reason: length
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