Feature request: G81 in all directions

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09 May 2018 13:14 #110434 by Shu
It seems that LinuxCNC's G81 wants to move into the negative only. Example: A large back-counterbore is to be drilled. With this op the retract plane is further down in Z- than the actual machining point.
Another example: A tool in the spindle has got a 90 deg offset in A or B, for horizontal boring operations. G81 works fine if approached from X+, drilling into the right side of the workpiece, but breaks if approached from X-, left side of the work piece.

(DRILL FROM LEFT)
(TOOL AT B-90 ANGLE WITH ANGLE ADAPTER, NOT WITH ROTARY TABLE, HORIZONTAL OP FROM LEFT SIDE )
(SET G19, WORKPLANE YZ, APPROACH FROM LEFT SIDE)
N100 G19 (CURRENTWORKPLANE 0, -1.5708, 0)
N105 G0 X-5.
N110 G81 X10. Y-20. Z-20. R5. F250
N115 G0 X-15.
N120 G53 Z0.
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09 May 2018 23:58 #110473 by andypugh
You could try adding this to the tracker here:
github.com/LinuxCNC/linuxcnc/issues

And labelling as "enhancement"
The following user(s) said Thank You: Shu
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10 May 2018 00:06 #110475 by Shu
thanks, done! can't label as i'm not a team member in the repo tho
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