CAM: spindle always on?

[darkg]

In CAM version, Is there a way to prevent spindle to wind down between countours?

[andrew]

Please indicate which post-processor you are using, how the G-Code looks like and how it should look like. It's likely a small adjustment to achieve that. In fact, most post-processors don't stop the spindle between contours.

[darkg]

Thank you!

The postprocessor in this case is "G-Code (G41/G42)".

I believe this is a transition between two contours:

Code: Select all

...
N3290 G2 X11.9744 Y14.2257 I-0.9897 J-0.331
N3300 G2 X12 Y14 I-0.984 J-0.2257
N3310 G1 Z2
N3320 G0 X14 Y12
N3330 G1 Z-0.1 F200
N3340 G2 X14.2257 Y11.9744 I0 J-1.0096 F400
N3350 G2 X14.3272 Y11.9461 I-0.2295 J-1.018
...

And well, it seems to be nothing wrong here :-/

Is it, then, the GRBL controller (Candle) or the machine's board that is behaving this way, do you think?

[CVH]

In fact, most post-processors don't stop the spindle between contours.

Indeed not common practice.

I believe this is a transition between two contours:

Indeed
-> N3300 path
Normal up to 2
G0 travers 14,12
Plunge down F200
N3340 >> new path F400

We would expect a M5 as we can rule out M0,M1,M2 & other stops.
M3, M4 are also candidates, a suplemental M6 can trigger this too.

Is it, then, the GRBL controller (Candle) or the machine's board that is behaving this way, do you think?

Normally if there is no Gcode for it, nor the controller, nor the machine's board will execute anything...

I think it is bets to test it with some simple aircut gcode lines untill you find what the cause might be.

Sidenote:
Plunge down F200
I hope this is not for metal.
Most mills aren't made for plunging. Drills are.

Happy hunting
Regards,

[Kiddmar]

Testing it with aircut gcodes can take pretty long, right?

[darkg]

Sidenote:
Plunge down F200
I hope this is not for metal.

Yes and no, this particular job is a laminate with .2(?) mm aluminium top layer.
It's an engarving style machine.

[CVH]

Testing it with aircut gcodes can take pretty long, right?

Why? Just fool the Z zero so it cuts in air.
CVH

[CVH]

Yes and no, this particular job is a laminate with .2(?) mm aluminium top layer.
It's an engarving style machine.

And you plunge 0.1mm?
In the end this approach will kill your cutter sooner.

Advice: in metal laminate plunge through the metalsheet.
So the engraving cutter cuts the metal sideways.

As an engraver I know that that the cut-in is better done by a ramp then straight down.
In many CAM's you don't have that option.
In high end engravers this is build in.
A gap I can not bridge up to now.

We have to do it with what we got.

Regards,
CVH

[darkg]

I have not (yet) made friends with the lead in feature of QCAD. I appreciate the advice though.