[Ahamay17]

In trying to do some tapping with Fusion 360 on some fixtures, and ran into this issue…
On the code below, when Mach3 implements line 18, the spindle which is already running at 1206 rpm bumps up to 6000 rpm for the feed into the hole, stops, then retracts at 1206 rpm, and continues to tap the next 3 holes correctly at 1206 rpm…

I can remove the “S1206” from line 18, or I can remove all of line 12 and the routine works without any issues… (when the spindle bumps up the spindle speed continues to show to be at 1206 rpm) I have tested it with a routine that had 40 holes to be tapped, and all I have to do is remove one or the other and it will tap all 40 holes without issue…The problem is, after all my testing was done, I have created three actual gcode files that include tapping, and I have already forgotten twice to remove one or the other…Luckily, so far I am only tapping ½” aluminum, with through holes, and I have exactly that much extension in my tapping head…so I haven’t broke anything…..yet

But, I would like to find a solution before my luck runs out, and depending on myself to remember to manually remove the code is not the best of choices… Is this another Mach3 bug that needs a work around? If so is there a work around? Is there a setting in Mach3 that can be changed to prevent this? Something that can be changed in the post processer to prevent the redundant command? Or ???

Ray

1.(1001)
2.(T203 D=0.25 CR=0. - ZMIN=-0.735 - RIGHT HAND TAP)
3.G90 G94 G91.1 G40 G49 G17
4.G20
5.G28 G91 Z0.
6.G90
7.
8.(DRILL2)
9.M5
10.M9
11.T203 M6
12.S1206 M3
13.G54
14.M8
15.G0 X-2.9129 Y-1.4129
16.G43 Z0.6 H203
17.Z0.2
18.M29 S1206
19.G98 G84 X-2.9129 Y-1.4129 Z-0.735 R0.2 F60.3
20.Y1.4129
21.X2.9129
22.Y-1.4129
23.G80
24.Z0.6
25.
26.M9
27.G28 G91 Z0.
28.G28 X0. Y0.
29.M30

[kvom]

I would consider modifying the Fusion 360 post to remove the S word after M29