[Fighter]

When I spot drill a part and then do a tool change to drill it, the spindle does not start after the tool change. I ran other similar programs this morning spot drilling, drilling, then tapping and had no problems with the spindle starting.

What have I got wrong here?

(DRILL)
N1T21M03
N2G81Z-0.0875R.1F10.
N3X1.0334Y-0.8264
N4X4.2735Y-0.3125
N5X4.9033Y-0.3125
N6X5.0891Y-1.7989
N7X4.4690Y-1.8765
N8X0.7949Y-1.8618
N9G80
N10T22M06
N11G73Z-0.3092K.150Q.050R.1F5.
N12X1.0334Y-0.8264
N13X4.2735Y-0.3125
N14X4.9033Y-0.3125
N15X5.0891Y-1.7989
N16X4.4690Y-1.8765
N17X0.7949Y-1.8618
N18G80
N19M30
E

I got tired of trying to figure it out and added an M03 after the tool change to get the job done.

Thanks!

[jagardner4]

An M06 will always output an M05 to the interface, stopping the spindle. An M03/M04 is necessary after any tool change to restart the spindle.

[Fighter]

Thanks!

Could it be that G84 need no M3?

I'm still running G84 with no M3 after an M6.

[jagardner4]

A G84 tap cycle issues an M code (either M03 or M04) to reverse the spindle at the bottom of the hole, after an M05 (as long as the M05 is not shut off by parameter). The spindle is reversed to the original direction at the reference plane (at the end of the cycle), once the tap has presumably left the part.

Notice there isn't an M03 or M04 code issued at the start of the cycle. I would think you would want an M03 (or M04) with an S code (to set the spindle RPMs), after any tool change and before the G84 tapping cycle block.