Homing to sides of workpiece with real tool How? Lathe
- verticalperformance
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25 Dec 2018 01:00 #122852
by verticalperformance
Replied by verticalperformance on topic Homing to sides of workpiece with real tool How? Lathe
Two things I can think of. Tool length offsets are coming into play somehow. Do a T0 M6 first to make sure that the tool table is not affecting the touch off is some way. Then repeat your test , ensuring that you do a touch off on Z, not a tool touch off (sorry can't remember exactly wording). See if you get the same result as before (is dial gauge dose not report z=0). If so, perhaps the Z-axis scale is incorrect, or Linux CNC thinks it is moving 5inch, but the hardware is actually moving more/less than 5 inch?
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25 Dec 2018 09:09 #122864
by andypugh
What did the DRO say after the touch-off and the move?
Did you touch-off the tool or the coordinate system?
Is your machine set up for touch-off to workpiece or touch-off to fixture?
Replied by andypugh on topic Homing to sides of workpiece with real tool How? Lathe
I touched off at a point for Z and entered -7.33. It was verified with the dial gauge.
I then went to 0 with g01 z0.
dial gauge read -0,120.
What did the DRO say after the touch-off and the move?
Did you touch-off the tool or the coordinate system?
Is your machine set up for touch-off to workpiece or touch-off to fixture?
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25 Dec 2018 20:21 #122888
by berntd
Replied by berntd on topic Homing to sides of workpiece with real tool How? Lathe
Hello
Thanjs again for the great help.
"Touch off" I have not used tool touch recently off as that also makes no sense.
The screen DRO is set for relative. I am not sure what that means and relative to what. I can't find a description in the manual.
I think after the move, it reads 0.000 for Z. I need to re-test it again as I now already forgot the finer details.
Thanjs again for the great help.
"Touch off" I have not used tool touch recently off as that also makes no sense.
The screen DRO is set for relative. I am not sure what that means and relative to what. I can't find a description in the manual.
I think after the move, it reads 0.000 for Z. I need to re-test it again as I now already forgot the finer details.
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29 Dec 2018 14:41 - 29 Dec 2018 14:42 #123077
by andypugh
Replied by andypugh on topic Homing to sides of workpiece with real tool How? Lathe
"Relative" means G54 etc coordinates. "Machine" or "Absolute" means the actual physical axis position. Or at least it does if you have home sensors and correctly set-up axis limits.
If you can home anywhere then neither necessarily means anything.
If you can home anywhere then neither necessarily means anything.
Last edit: 29 Dec 2018 14:42 by andypugh.
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29 Dec 2018 18:58 #123110
by tecno
Replied by tecno on topic Homing to sides of workpiece with real tool How? Lathe
berndt
Why not take the easy way out and install home switches?
Why not take the easy way out and install home switches?
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