G-Code tutorial - Avoiding Obstacles Using G98 and G99 Codes

[@Ddabig40mac]

The G98 requires the full Z-axis retract (to 15.0mm in this example) BEFORE the rapid traverse to the next hole location? Instead of the Z-axis retract to the R value (1.0mm) and then rapid traverse Z15.0 X50.0, because that could still crash, I want to clarify the machine behavior.

[@LuisLopez-sp2kh]

that was exactly my experience when switching from G99 to G98 in the program, even though I switched before calling the next position (not saying this video is wrong or anything, i had that accident before watching this). what fixed it was cancelling the cycle when i was done with G99, call the next position which was higher and then start a new canning cycle. works great

[@NancyTrogman]

The code is wrong. G98 should be on the line with the first X50, then G99 should be on the line with the second X50. G98 and G99 describe what happens AFTER the hole is drilled. The code should be as follows: G81 G91 G99 Z-12.0 R1.0 F50.0 (Drill first hole at X20.0, Y20.0, then return to R plane -> Z1.0mm) X50.0 G98 (Move +X50.0 at current height, 1.0, drill hole, then return to Initial plane -> Z15.0) X50.0 G99 (Move +X50.0 at current height 15.0, drill hole, then return to Retract plane -> Z1.0) Y40.0 ( Move +40.0 at current height, 1.0, drill hole, then return to retract plane) G80