Acu-Rite CNC 3500i User Manual

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7 Programming: Canned Cycles, sub-programs
7.
3 Pr
obing Cy
cles
Skew Compensation 
G68, axis rotation, cannot be used with skew compensation find. 
Skew compensation is only supported for along the side edge of a 
part relative to the X,Y plane. Skew compensation is only supported 
for along the side edge of a part relative to the X,Y plane.
Calibrate the work probe at least once before trying to use this cycle. 
A preliminary tool-length offset must be set by eye for the work 
probe. The tool offset, and work coordinate must be active before 
using this cycle in a program. See Section 4, "Tool-Length Offsets" 
on page 73.
The probe must be pre-positioned to the proper spot in relation to 
the part in accordance with the specified S parameter as described 
below or an I, J, and/or K should be included for pre-positioning.
The Skew compensation Finding Cycle can be run from within a 
program or from the Manual Data Input Mode . 
Field
Code
Description
Action
Q
Q0  Finds the skew angle, but does not 
activate skew compensation.
Q1  Finds the skew angle, and activates 
skew compensation.
Q2  Activates skew compensation with the 
current skew value, but does not rerun the 
cycle on the part.
If Q2 is used, all other skew compensation 
parameters are ignored.
Before using skew compensation Q2, you 
must have called skew compensation at 
least once with Q0 or Q1, or the error 
message "Skew Compensation has not 
been found!" is displayed.
Skew compensation is activated around the 
current active work coordinate and only 
works from within the program being run.
Skew compensation cannot be activated 
directly or indirectly using skew 
compensation from the MDI mode.
The operator can run the skew 
compensation from MDI but must place 
skew compensation Q2 inside the program 
for skew compensation to take effect.
A G53 work coordinate call deactivates 
skew compensation, necessitating a 
re-issuance of skew compensation Q2 to 
activate skew compensation.
Using Q1 or Q2 defaults the control to G90 
(Absolute). If you are in G91 (Incremental), 
you need to switch back after the cycle has 
been run. (Optional)