laser 78
which of the settings you need?

Hi, setup mach3 file xml.

how i find it?sorry

C:/mach3/mill.xml .

I have made to profiles 1 for cut and 1 for engrave ,with different names if it makes any difference.Thanks

Tweakie thanks,
but when i am reducing to 5000mm/min the laser doesnt fire!

Just a thought but it may be worth looking at the electronics train (TTL) to improve the voltage that you get at the laser input. IMO the laser should be triggering OK at 5,000 mm/min (mine triggers down to 3,000 mm/min). If you can get this sorted then I am reasonably confident that the double image problem will be cured and you can return to the 70,000 speed without issue.

Tweakie.

Thanks tweakie i will have a look.I am using pwm from mach board,so its little bit tricky to find the voltage and its frequency.

Thanks tweakie i will have a look.I am using pwm from mach board,so its little bit tricky to find the voltage and its frequency.

I think that is your problem.
I tried using the Mach PWM and dropped it in favour of 0 to 5 volt analog control for my max laser power.

Tweakie.

There is something going on with the combination of speed,kernel speed and the laser.I tried a reduced kernel speed and reduce motor speed and the laser fired at 3000mm/min.The image now is one above the other. It seems more linear the output of laser combined with the speed change.But the problem still exist and the speed I need for production is close to 50000mm/min ,by how it seems when the machine is running!!

I think this is because Mach has a lot to do just to calculate and generate the pulse stream so the PWM speed control comes second.
I really think you should consider the 0 to 5 volt analog or else construct a 'stand alone' PWM generator for the laser maximum current control. (Using a PIC which incorporates the HPWM it is not difficult to do and it will run from 5 volts and need less than 10 or so components to complete).


Tweakie.