Peck drilling

Bug Report Done #D9QQE 1 Jul 2026

Peck drilling times seem much longer than my actual cycle times. Here is the test code I used.

(T1 D=5.0 - 5MM DRILL)
G21 G90 G17 G94 G54
T1 M6
S2000 M3
G0 X0 Y0 Z25
G83 X0 Y0 Z-20 R2 Q2 F200
X20 Y0
X40 Y0
X60 Y0
G80
G0 Z25
M5
M30

Comments 4

UltraNC 1 Jul 2026

Thanks for the code. Let us take a look.
UltraNC 1 Jul 2026

Well, that was a genuine bug After a G83 full retract, we were feeding the tool all the way back down instead of rapiding to just above the last cut. On a deep hole that extended G83 plunge time resulting in a longer simulation.
This is now fixed. Let us know how it goes.
Maker-MMD 1 Jul 2026

Thanks, that fixed it.
UltraNC 1 Jul 2026

We added a new page explaining G83 vs G73 cycle times
https://ultranc.com/machining-time/peck-drilling-cycle-time/

Peck drilling

Comments 4

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