How do I avoid the delay on the M3 command (laser cutting)

[MatD]

Hi,

I'm using mach 3 for my laser cutter.
It does everything as great except for one thing:
When mach 3 reads the M3 command (spindle on, for me laser on),
it always had a small delay.
Can anyone tell me how to solve this problem?
It should go over the M3 command in a fraction of a second instead of staying there half a second.
Thanks!

[Superman]

I don't know if this applies to a laser

But on a CNC mil or lathel, the machine will wait on the M3 (spindle start CW) until it is up to correct speed, ( this allows the machine to be at correct speed before entering the cut ).
this can be sped up, especially when the head is in the "home" position, and there is a distace to travel before cutting

Check for an "Ignore up-to speed answer back" or similar M-code ( it is a one shot -meaning it only works on that line of code )

mill programming example

T1 M6
G0 X0. Y0.
S5000 M3 M133
G56 Z1. H1
M3
G1 Z-......

The 1st M3 tells the spindle to start, M133 to not wait for the up-to speed check and go do the next block of code
The 2nd M3 is to do the full check that it is on and at the correct speed and if OK to continue ( which would only be momentary ).

[dertsap]

go to ports and pins then go to spindle setup , you can adjust the delay there

[MatD]

Even when I put the spindle up times to 0sec., or when I put M133 behind the M3 command, It still waits a bit.
Only when I enable the "laser mode freq." in the spindle setup it is fast enough, but now the output stays low on M3 command (I see the spindle go on in the software, but output 1 (linked to the spindle) stays low).
Where can I change this?

[Superman]

I am a noob in lasers
The "M133" was my example of how to use an M-code to ignore a specific check
Your machine may use a different code,
and this method may be totally wrong for a laser, as you don't wont the laser ON when rapiding across space

[ger21]

The easiest way might be to create a custom M code to activate the laser instead of M3. I don't think you can get rid of that built in short delay.

[mactec54]

Hi MatD

I would use the Brain & program what you want the control to do that is what the Brain is for in Mach