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    Royassas

    @Royassas

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    Website zigerschlitzmakers.ch Location Näfels, GL, Switzerland

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    Best posts made by Royassas

    • RE: Power loss controlling laser via ttl on Duet 3

      Ok - problem solved! A new member of our makerspace brought his scope. Turns out, there's a little glitch in the documentation of possible Gcodes für the M452 command:

      @dc42 I suggested the following correction of the at GCode Wiki:

      M452 C"exp.heater3" F100 ; laser uses heater3 pin, PWM frequency 100Hz
      

      instead of:

      M452 C"exp.heater3" Q100 ; laser uses heater3 pin, PWM frequency 100Hz
      

      That letter must have cost me 5 nights 😉

      With this change I got to play with the PWM-frequency:

      • If i set it too low, for example to 500Hz - the default if no F parameter is set, I got the problem described above.
      • If i set it too high, for example the maximum of about 65kHz, i oversaturated my power supply and the laser kept burning at maximum power.

      In the end i settled for 12500Hz - and lazing is fun again!!
      20200722_230343.jpg

      posted in Laser Cutters
      Royassasundefined
      Royassas

    Latest posts made by Royassas

    • RE: Power loss controlling laser via ttl on Duet 3

      Ok - problem solved! A new member of our makerspace brought his scope. Turns out, there's a little glitch in the documentation of possible Gcodes für the M452 command:

      @dc42 I suggested the following correction of the at GCode Wiki:

      M452 C"exp.heater3" F100 ; laser uses heater3 pin, PWM frequency 100Hz
      

      instead of:

      M452 C"exp.heater3" Q100 ; laser uses heater3 pin, PWM frequency 100Hz
      

      That letter must have cost me 5 nights 😉

      With this change I got to play with the PWM-frequency:

      • If i set it too low, for example to 500Hz - the default if no F parameter is set, I got the problem described above.
      • If i set it too high, for example the maximum of about 65kHz, i oversaturated my power supply and the laser kept burning at maximum power.

      In the end i settled for 12500Hz - and lazing is fun again!!
      20200722_230343.jpg

      posted in Laser Cutters
      Royassasundefined
      Royassas
    • RE: Power loss controlling laser via ttl on Duet 3

      I'm hoping to get a grip on an oscilloscope in the next couple of days to check the PWM output

      posted in Laser Cutters
      Royassasundefined
      Royassas
    • RE: Power loss controlling laser via ttl on Duet 3

      @droftarts Thanks for your reply.
      I'm using R1 because i use LightBurn with the Smoothieboard-settings - i can't change the min/max S parameters in that profile.
      This is the GCode-File i used:

      ; LightBurn 0.9.14
      ; Smoothieware device profile, current position
      ; Bounds: X-0 Y0 to X100 Y100
      G00 G17 G40 G21
      G91
      M3
      ; Cut @ 500 mm/min, 50% power
      M106
      G4S5
      G0X45.43Y53.44
      G1Y-0.81S0.5F500
      G1X-0.01Y-0.66
      G1X-0.01Y-1.04
      G1X-0.02Y-1.43
      G1X-0.03Y-0.99
      G1X-0.02Y-0.79
      G1X-0.02Y-0.67
      G1X-0.01Y-0.59
      G1Y-0.55
      G1X0.03Y-0.52
      G1X0.05Y-0.5
      G1X0.08Y-0.47
      G1X0.12Y-0.46
      G1X0.15Y-0.43
      G1X0.2Y-0.42
      G1X0.24Y-0.38
      G1X0.28Y-0.35
      G1X0.34Y-0.32
      G1X0.38Y-0.27
      G1X0.43Y-0.22
      G1X0.47Y-0.16
      G1X0.51Y-0.1
      G1X0.55Y-0.03
      G1X0.57Y0.04
      G1X0.59Y0.12
      G1X0.61Y0.21
      G1X0.61Y0.28
      G1X0.6Y0.38
      G1X0.58Y0.46
      G1X0.56Y0.54
      G1X0.51Y0.63
      G1X0.46Y0.7
      G1X0.4Y0.78
      G1X0.32Y0.84
      G1X0.23Y0.89
      G1X0.15Y0.95
      G1X0.03Y0.97
      G1X-0.07Y0.99
      G1X-0.19Y1.01
      G1X-0.3Y0.99
      G1X-0.43Y0.97
      G1X-0.55Y0.94
      G1X-0.67Y0.88
      G1X-0.79Y0.81
      G1X-0.89Y0.73
      G1X-1Y0.62
      G1X-1.08Y0.52
      G1X-1.17Y0.39
      G1X-1.22Y0.25
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      G1X-1.31Y-0.2
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      G1X0.83Y-0.1
      G1X0.83Y-0.08
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      G1X0.8Y0.31
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      G1X0.78Y0.35
      G1X0.77Y0.38
      G1X1.51Y0.83
      G1X1.45Y0.91
      G1X1.4Y1
      G1X1.34Y1.08
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      G1X0.95Y1.44
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      G1X-0.6Y0.72
      G1X-1.25Y1.39
      G1X-1.35Y1.32
      G1X-1.44Y1.24
      G1X-1.51Y1.16
      G1X-0.79Y0.55
      G1X-0.8Y0.53
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      G1X-0.93Y0.33
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      G1X-0.95Y0.28
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      G1X-0.98Y0.17
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      G1X-1.01Y-0.18
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      G1X-1.15Y-0.72
      G1X-1.13Y-0.76
      G1X-1.11Y-0.79
      G1X-1.08Y-0.82
      G1X-1.06Y-0.85
      G1X-1.02Y-0.89
      G1X-1.01Y-0.92
      G1X-0.97Y-0.94
      G1X-0.94Y-0.98
      G1X-0.92Y-1
      G1X-0.88Y-1.03
      G1X-0.85Y-1.05
      G1X-0.81Y-1.08
      G1X-0.78Y-1.11
      G1X-0.75Y-1.13
      G1X-0.71Y-1.15
      G1X-0.67Y-1.17
      G1X-0.64Y-1.19
      G1X-0.6Y-1.21
      G1X-0.56Y-1.23
      G1X-0.52Y-1.25
      G1X-0.49Y-1.26
      G1X-0.44Y-1.28
      G1X-0.4Y-1.29
      G1X-0.36Y-1.3
      G1X-0.32Y-1.31
      G1X-0.28Y-1.33
      G1X-0.23Y-1.33
      G1X-0.19Y-1.34
      G1X-0.15Y-1.35
      G1X-0.11Y-1.35
      G1X-0.06Y-1.36
      G1X-0.02Y-1.36
      G1X0.02Y-1.36
      G1X0.07Y-1.36
      G1X0.11Y-1.36
      G1X0.16Y-1.36
      G1X0.2Y-1.35
      G1X0.24Y-1.35
      G1X0.29Y-1.35
      G1X0.33Y-1.33
      G1X0.37Y-1.33
      G1X0.42Y-1.32
      G1X0.46Y-1.3
      G1X0.5Y-1.3
      G1X0.54Y-1.28
      G1X0.58Y-1.26
      G1X0.63Y-1.25
      G1X0.66Y-1.23
      G1X0.71Y-1.22
      G1X0.74Y-1.19
      G1X0.79Y-1.18
      G1X0.82Y-1.15
      G1X0.86Y-1.13
      G1X0.9Y-1.1
      G1X0.93Y-1.08
      G1X0.97Y-1.06
      G1X1Y-1.02
      G1X1.03Y-1
      G1X1.07Y-0.97
      G1X1.1Y-0.94
      G1X1.13Y-0.9
      G1X1.16Y-0.88
      G1X1.19Y-0.84
      G1X1.22Y-0.81
      G1X1.24Y-0.78
      G1X1.27Y-0.73
      G1X1.3Y-0.71
      G1X1.32Y-0.66
      G1X1.34Y-0.63
      G1X1.36Y-0.59
      G1X1.38Y-0.55
      G1X1.4Y-0.51
      G1X1.41Y-0.48
      G1X1.44Y-0.43
      G1X1.44Y-0.39
      G1X1.46Y-0.35
      G1X1.48Y-0.3
      G1X1.48Y-0.27
      G1X1.49Y-0.22
      G1X1.51Y-0.18
      G1X1.5Y-0.13
      G1X1.52Y-0.1
      G1X1.51Y-0.04
      G1X1.52Y-0.01
      G1X1.52Y0.04
      G1X1.53Y0.08
      G1X1.51Y0.13
      G1X1.52Y0.17
      G1X1.51Y0.21
      G1X1.51Y0.26
      G1X1.49Y0.3
      G1X1.49Y0.35
      G1X1.48Y0.38
      G1X1.47Y0.44
      G1X1.45Y0.47
      G1X1.44Y0.51
      G1X1.43Y0.56
      G1X1.4Y0.6
      G1X1.39Y0.64
      G1X1.37Y0.68
      G1X1.35Y0.72
      G1X1.33Y0.76
      G1X1.3Y0.8
      G1X1.28Y0.83
      G1X1.25Y0.88
      G1X1.22Y0.91
      G1X1.2Y0.94
      G1X1.16Y0.98
      G1X1.14Y1.02
      G1X1.1Y1.05
      G1X1.07Y1.08
      G1X1.04Y1.11
      G1X1Y1.14
      G1X0.96Y1.17
      G1X0.93Y1.2
      G1X0.89Y1.23
      G1X0.85Y1.26
      G1X0.81Y1.27
      G1X0.77Y1.31
      G1X0.73Y1.33
      G1X0.69Y1.34
      G1X0.64Y1.37
      G1X0.6Y1.39
      G1X0.56Y1.41
      G1X0.51Y1.42
      G1X0.46Y1.44
      G1X0.22Y0.72
      G1X0.2Y0.73
      G1X0.2Y0.73
      G1X0.18Y0.74
      G1X0.17Y0.74
      G1X0.15Y0.74
      G1X0.15Y0.74
      G1X0.13Y0.74
      G1X0.12Y0.75
      G1X0.11Y0.75
      G1X0.1Y0.75
      G1X0.09Y0.75
      G1X0.07Y0.76
      G1X0.06Y0.75
      G1X0.05Y0.76
      G1X0.04Y0.76
      G1X0.03Y0.76
      G1X0.01Y0.76
      G1Y0.76
      G1X-0.01Y0.76
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      G1X-0.04Y0.76
      G1X-0.05Y0.76
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      G1X-0.09Y0.76
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      G1X-0.11Y0.76
      G1X-0.12Y0.76
      G1X-0.14Y0.75
      G1X-0.14Y0.75
      G1X-0.16Y0.75
      G1X-0.17Y0.75
      G1X-0.18Y0.75
      G1X-0.19Y0.74
      G1X-0.21Y0.74
      G1X-0.22Y0.74
      G1X-0.23Y0.74
      G1X-0.24Y0.73
      G1X-0.25Y0.73
      G1X-0.55Y1.45
      G1X-0.59Y1.43
      G1X-0.63Y1.42
      G1X-0.68Y1.4
      G1X-0.73Y1.38
      G1X-0.77Y1.36
      G1X-0.82Y1.34
      G1X-0.86Y1.32
      G1X-0.9Y1.29
      G1X-0.94Y1.27
      G1X-0.99Y1.24
      G1X-1.03Y1.21
      G1X-1.06Y1.19
      G1X-1.1Y1.15
      G1X-1.15Y1.13
      G1X-1.17Y1.09
      G1X-1.22Y1.05
      G1X-1.25Y1.03
      G1X-1.28Y0.98
      G1X-1.31Y0.96
      G1X-1.35Y0.91
      G1X-1.38Y0.87
      G1X-1.4Y0.84
      G1X-1.43Y0.8
      G1X-1.46Y0.75
      G1X-1.48Y0.72
      G1X-1.51Y0.67
      G1X-1.53Y0.62
      G1X-0.77Y0.3
      G1X-0.78Y0.29
      G1X-0.79Y0.27
      G1X-0.78Y0.27
      G1X-0.79Y0.25
      G1X-0.8Y0.24
      G1X-0.8Y0.23
      G1X-0.81Y0.22
      G1X-0.8Y0.21
      G1X-0.82Y0.2
      G1X-0.81Y0.18
      G1X-0.82Y0.17
      G1X-0.82Y0.16
      G1X-0.83Y0.15
      G1X-0.82Y0.14
      G1X-0.83Y0.13
      G1X-0.84Y0.11
      G1X-0.83Y0.1
      G1X-0.84Y0.09
      G1X-0.84Y0.08
      G1X-0.84Y0.06
      G1X-0.84Y0.06
      G1X-0.84Y0.04
      G1X-0.84Y0.03
      G1X-0.85Y0.02
      G1X-0.84
      G1X-0.84Y-0.01
      G1X-0.85Y-0.02
      M107
      G1S0
      M5
      ; return to starting pos
      G0 X-43.68Y-99.97
      M2
      

      No reason for the 20'000 Hz, i think i read that the duet 3 can output 65khz max. - i can't find any recommandations on the cloudray power supply specs for this. I'm using this one: 100W CO2 Laser Power Supply MYJG-100W LCD. My nooby self expects a smoother average voltage with higher PWM-frequency.

      posted in Laser Cutters
      Royassasundefined
      Royassas
    • Power loss controlling laser via ttl on Duet 3

      I'd love to get some advice from you guys.

      I'm using the new Duet 3 Motherboard 6HC + RPi (DSF Version: 3.1.1, RepRapFirmware for Duet 3 MB6HC 3.1.1 (2020-05-19b2)) and built my own laser using an SPT 100W red dot tube and an Cloudray 100W power supply. It moves, it lazes, but not consistently. I spent many nights troubleshooting and would love to get your input on the following problem:

      When i start a lazing job, initially the power is very high, but looses lots of power over the next 4-5cm - it finishes the job with this very low power (probably only about 20% of the acutal set power) - it sometimes doesn't even activate the laser anymore (which means less than about 5-6mA). During all this i get normal amperage readings (17mA for S0.5 = 50% PWM), which confuses me.

      Today i disconnected the power supply from the Duet 3 and controlled power via a potentiometer - no power loss here (I'm very happy about this - thought i killed the tube!). Below you'll find two test jobs i just lazed.

      20200721_141513.jpg
      Image: Left - 15mA via Potentiometer, Right - 17mA via TTL

      All this tells me I must be doing something wrong controlling the lasers power input via TTL:

      • I connected the 5V rail of the power supply to the "IN" port - which should give full power if activated via TTL.
      • I attach the ground-cable from the duets "out9" (the somewhat dedicated laser output port) to TTL_High "H" on the power supply and ground from the out9-port to ground on the power supply.
      • I'm overriding the waterpump-alarm on the power supply with a simple switch.

      This is my config.g:

      ; General preferences
      G90                              ; send absolute coordinates...
      M550 P"Duet 3"                   ; set printer name
      
      ; Drives
      M569 P0.0 S1                     ; physical drive 0.0 goes forwards
      M569 P0.1 S1                     ; physical drive 0.1 goes forwards
      M569 P0.2 S0                     ; physical drive 0.2 goes backwards
      M569 P0.4 S1                     ; physical drive 0.4 goes forwards
      M584 X0.0 Y0.1:0.4 Z0.2          ; set drive mapping
      M350 X16 Y16 Z16 I1              ; configure microstepping without interpolation
      M92 X53.33 Y53.33 Z3820.00       ; set steps per mm
      M566 X100.00 Y100.00 Z50.00      ; set maximum instantaneous speed changes (mm/min)
      M203 X20000.00 Y20000.00 Z500.00   ; set maximum speeds (mm/min)
      M201 X1000.00 Y1000.00 Z20.00      ; set accelerations (mm/s^2)
      M906 X1650 Y1650 Z1650 I30       ; set motor currents (mA) and motor idle factor in per cent
      M84 S30                          ; Set idle timeout
      
      ; Axis Limits
      M208 X0 Y0 Z0 S1                 ; set axis minima
      M208 X1358 Y878 Z240 S0          ; set axis maxima
      
      ; Use Endstops
      M574 X2 S1 P"!io0.in"                    
      M574 Y1 S1 P"!io1.in+!io4.in"                
      M574 Z2 S1 P"!io2.in"              
      
      ; Laser
      M452 C"out9" R1 S1 Q20000 
      

      I think this should be all the information needed. I'm happy to provide more if I missed something.
      Thanks for your help

      posted in Laser Cutters
      Royassasundefined
      Royassas
    • RE: DWC - dashboard move buttons: using G1-movements for XYZ-moves?

      Might this be because of the sticky S setting in laser mode definition?

      posted in General Discussion
      Royassasundefined
      Royassas
    • RE: Duet 3 Laser and PWM Frequency

      @jay_s_uk With a duet 3? If yes: Which profile do you use?

      posted in Laser Cutters
      Royassasundefined
      Royassas
    • RE: Going to build a laser engraver...

      Disregard my statement above - with further testing - it doesn't seem to play along.... - Let's wait for the firware update

      posted in Laser Cutters
      Royassasundefined
      Royassas
    • RE: Duet 3 Laser and PWM Frequency

      @bearer Couldn't find an acceptable machine profile yet. Engraving and cutting probably needs the speed-adjusted update thats scheduled to come soon to duet3 firmware as @dc42 mentioned in other posts.

      posted in Laser Cutters
      Royassasundefined
      Royassas
    • DWC - dashboard move buttons: using G1-movements for XYZ-moves?

      Im using the Duet 3 with the lastest unstable releases in laser mode.

      Writing my own programms and using homing-macros works as expected: G0 moves don't turn the laser on, G1s do.
      If I move my x,y or z-axis in the Dashboard the movements seem to be G1 movements as the laser fires 😮 - I only noticed this because my z-movement is slow. If i set the speed of movement buttons to 500 - all movements fire.

      Do i need to invert the pin in Laser mode definition - if so, why do the G0 and G1 movements work as expected?

      posted in General Discussion laser duet web control move buttons dashboard
      Royassasundefined
      Royassas
    • RE: Duet 3 Laser and PWM Frequency

      Thanks @dc42 for your help - your work is highly appreciated! That PWM-Frequency really gave me a headache. Lots of information, but i couldn't find anything relevant to my situation. Your explanation makes a lot of sense, though.

      I spent last night trying to figure things out and in the end: My speeds were too slow - as you suggested. I'm now off to my next mission: Finding suitable Laser-CAMs for the Duet 3.

      posted in Laser Cutters
      Royassasundefined
      Royassas