Whoever wrote the post thought it was a good idea??
Hi!
I am new to CNC, so maybe I have some misunderstanding.
My CNC mill is setup with Z-Axis counting upwards, Z-endstop mounted so home-position is UP and is at 0(mm). Soft-limits are set to 0.1mm (upper) and -130.1mm (lower). So in fact I am working with negative Z heights.
I am using Fusion 360 with its integrated CAM and the UCCNC post from the autodesk website (latest).
All my GCode-files start with:
[CODE]G90
G0 G53 Z0.
[/CODE]
later in the program, it happens that
[CODE]G0 Z15[/CODE]
is set, so hitting the softlimit (and endstop).
I could set Z home postion to 130 and work with positive Z heights.
[B]Yet what makes me wonder is the "G53". From my understanding it forces the machine to zero Z in its MCS, which makes absolutely no sense to me. From my understanding, I jog the machine to the desired zero-position and zero XYZ in the WCS. Then the programm uses the WCS exclusively. Why is there a reference to the MCS? It makes the machine move away from my desired Z height![/B]
Best regards,
Robert
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Whoever wrote the post thought it was a good idea??
Gerry
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(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Is this a statement or a question?
Sometimes I assume that in fact other people do something by intend. In this case, I would assume that the "G53" is perfectly right under the assumption that my setup is somehow not properly set up or at least in some unusual way. Not I am looking for feedback in a way that either a) I can align my setup to the standard or b) somebody tells me its perfectly ok to alter the post as the G53 is unusual there.
Best regards,
Robert
In a number of CNC controls that I am familiar with numerous actions have the G53 Z0 associated to them.
This is simply lifting the Z to its max height, "0" using the MCS. It should not matter if you are using the MCS or any of the WCS offsets. I would expect this is normal on all machines with a z homing switch and unusual on those that do not.
Gary Campbell GCnC Control
Servo Control & ATC Retrofits