the DSP actually does not block overload the lasertube

[waltfl]

Hi amrco,
I have inserted a 20mA meter in the ground wire of the lasertube to see the actuall current and have a big surprise.
I have set the manufactuerer settings for the max output to 70% and did cutting with 60% and the mA meter shows output up to over 20mA.even if I set the cutting to 50% its the same thing.
also the powwer settings are dependend on the speed , for insance if I set a speed to lests say 200mm/s the power to 20% the mA shows 4 mA but if I set the speed to 100mm/s the mA shows 14mA with the same power setting.
I expected like everybody sayd that the DSP cuts off the power when it goes over the set max output but it seams not to do this.
I dont know if this is just my sh... board or somebody else experience this too.
I used the 20mA meter from the original K40 setup
greetings
walt

[Tech_Marco]

Walt:

So, are you telling me that the deep of engraving (darker or ligher) doesn't change much even though you sloweing the speed as current raised correspondingly that associated to the change of the speed, right?

Hmm.... never seem that problem before. Got to try it

Are you using my PWM power supply? Check the software see if it's set to CO2 tube or RF. Also, do not set over 20,000 on the pulse



Marco

[waltfl]

hi marco
let me explaine it a bit different:
I have set the lasertube to CO2 and power max to 70% , the pulse to 20000 in the manufacturer settings.
now if I set in a cutting workfile the speed to 10mm/s and the power to 60% the start the job the mA shows
more then 20mA after a distance of about 30mm the same thing happen even if I set the power to 50 % or the speed to
4mm/s the meter jumps after a few mm.
by engraving is similar: 200 mm/sspeed , 20 % power the meter shows 4mA but lower the speed to 100mm/s the meter
shows 14mA and I just etsted this if I lower the speed to 50mm/s then the meter shows on 17ma.
sometimes the engraving goes after lowering the speed deeper but sometimes not.
yes I use all the parts from you : laser PS, DSP, 24V powersupply, 2 stepper driver m5042.
I hope that this clears up what I mean
greetings
walt

Walt:

So, are you telling me that the deep of engraving (darker or ligher) doesn't change much even though you sloweing the speed as current raised correspondingly that associated to the change of the speed, right?

Hmm.... never seem that problem before. Got to try it

Are you using my PWM power supply? Check the software see if it's set to CO2 tube or RF. Also, do not set over 20,000 on the pulse



Marco

[waltfl]

this probleme still remains.
I have set the power output in manufacturer settings to 80% and did a cutting by 8 mm/s and 60% power
the mA meter shows that the power goes to over 20mA I had to take the power setting for the job back to 55% and this did give 18mA reading.
this is a dangerous thing especially for guys who dont use a mA meter because for some tuff stuff they tend to use 100% what would give them more then 40mA I measured this with another meter and if this would gon on just for 10 to 15 such jobs the laser tube would be pretty much done.
greetings
walt