I hope in this repository finally new branch for cutting machine will be created and gather all enthusiast on same approach for standard Marlin version for cutting machine such as Plasma oxyfule and laser.It would be interesting to hear your thoughts about what new commands and features need to be added. There is no reason the 3D-Printer code can't co-exist with CNC milling and Laser cutting. In fact, it is very possible in the near future machines will have all 3.My initial thinking is we can give you a whole block of GCodes (for example: 700-800) for your stuff if you can think it through and come up with some well thought out plans. @Roxy-3DPrintBoard on my pull request to MarlinKimbra i've added the same GCodes as is Turnkey Tyranny modified marlin, retaining full compatibility with existing frontends for it (laserweb and the inkscape plugin first of all ).The complete gcode list is here:Most notables are:.

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G0 ang G1 aren't the same anymore. G0 move the head without firing laser, G1 with firing laser. Firing laser is also with G2 and G3 arc moves.

G7 to execute a raster line ( base64 encoded line ). M3 start laser at specific intensity/power. M4 Turn on laser. M5 Turn off laser. M649 to set laser options. M650 and 651 for mUVe specific laser kit 'peel'. Is a 'sort of de-facto' standard nowadays thanks to both the fact that repetier-firmware, other (older) marlin based modified firmwares like turnkey tyranny, and also other firmwares implement it in that way, also, looking at you can read:In Repetier-Firmware in laser mode you need S0.255 to set laser intensity.

Normally you use S255 to turn it on full power for moves. Laser will only fire during G1/2/3 moves and in laser mode (M452).Also, all host software specifically done for lasers like uses this 'standard'. The issue can be triggered when the firmware is compiled for a machine that have both 3d print and laser, as you will have to enable LASER define, and then when 3d print using a slicer that uses g0 and g1 without differentiation.But the issue is on the 3d print side, as for lasers the g0/g1 difference is a common thing. Maybe implementing also the M452 like in the repetier-firmware can solve this issue, when in laser mode g0 and g1 are different, where in 3d print mode g1 and g0 are equal, shold be easy to implement. Ok, I have ported it for my own purposes, and I know of several people that also have taken the laser code from and used it in current Marlin.

All credits goes to TT.The code is well working, has three laser modes, synchronous, pulsed and raster and the two last are synchronized with movements so no overexposure when motors stutter or during acceleration. The G7 command for raster engraving offloads the planner and stepper by putting like 50 rasterpoints into one stepper block. Reduces also serial line overhead. My own experience is that G7 can engrave at 3x the speed of G1 steps for every dot. The code is also very well encapsulated with #ifdef LASER. Modifications are in planner.cpp and stepper,cpp, in a few places not spread all over the code. I have taken the code into Marlin4Due and exactly the same code can be used.

Only the hardware PWM generation part is unique between Mega and Due. TT's PWM code work well for Mega, take my code for PWM if interested in Due, last part in HAL.cpp.The only drawback is the lack of g-code generators that use the G7 raster engraving command, only TT's own tool for Inkscape export does that afaik. It is not difficult at all, so things might change if Marlin gets the capability.

One question is how to hook up the laser driver and to control the intensity. There are laser drivers that use TTL as they call it, a 5V PWM up to like 20 kHz frequency is needed. There are laser drivers that use the voltage of the PWM signal to set max intensity, so adjustable voltage PWM is needed. Then there are laser drivers that use a 'firing pin'. The laser driver input can have common ground, thus disqualifying mosfet-controlled outputs, and there are laser-drivers with optically insulated inputs thus allowing the use of mosfet-controlled outputs. The laser pwm pin must be a pwm capable pin thus 2-13 and 44-46 according to docs.

Also the timer needed for the chosen pin must be free and not used by stepper, servo or temperature for example. I am puzzled because I don't understand what you mean by the differences between 8bit and 'TT'. TT's approach does encode every pixel in 255 range greyscale. Then due to the implementation in Marlin it sometimes doesn't come out very well, but there is a (at least one) fix for that as I showed in my code. What I have read is that have changed what the data in the G7 command means, with a larger than 255 range, and that is my worry. I could be wrong. But all I am saying is that I would like to keep the 255 encoding as TT did it, and fix the bad greyscale resolution at low intensity inside Marlin.I will see if I can test the code tonight.

It will have to be on the laserdiod so I'll see what I can do.I know of LaserWeb as well. I would really like so see that photo engravings can be encoded into G7 raster commands. That is not correct. The pixel data in the G7 line is full 256 range. It is when the pixel data enters these linesOldRange = (255 - 0);NewRange = (laser.rasterlaserpower - 7); //7% power on my unit outputs hardly any noticable burn at F3000 on paper, so adjust the raster contrast based off 7 being the lower. 7 still produces burns at slower feed rates, but getting less power than this isn't typically needed at slow feed rates.NewValue = (float)(((((float)laser.rasterdatai - 0). NewRange) / OldRange) + 7);the value gets reduced from 0-255 range to 0-100 range.

I have not seen 's patch, but I show one way to get rid of this limitation in the commit link a few messages above. I am glad I have found this conversation.I have a Tevo Black Widow and I am working on modifying it for 3D Filiment/Laser/CNC.

The function change will be by using custom tool mount plates. What I am hoping to do is to find 2 spare inputs so I can use a simple binary decode to work out what physical head is installed.i.e. 00 - No Head, 01 - 3D Print, 10 - Laser, 11 - CNC.The Mega can then do a check before starting the print and so update the LCD with the correct tool, and also enable/disable various functions or codes.Likewise as most 3D print style software can have some starting G-Codes one can add in a specialised one to check that the correct tool is installed and warn if not.Just some idea's. I too am glad I found this. I currently have a diode laser mounted alongside my extruder.

I've used a selector switch between extruder fan and laser. I use the Inkscape laser plugin to turn the laser/fan output on/off.The only difference is that my laser is always attached and I can begin using it with a simple flick of a switch.

It is riding alongside the extruder permanently.It would be great to have a T0 (extruder) and T1 (laser) #define that allows me to switch over.I would like the T1 to use the offsets already defineable in the Marlin config. The difference is that I would like to avoid having to set all the other related defines usually needed for a dual extruder setup.Switching from T0 to T1 would immediately move the printer to the new offset position to verify position and begin use (I think it already does this, not sure, since I can't get around all the dual extruder settings as of now)Hoping this could be an over-simplified way for the creative juices to begin flowing for dual purpose movement.

(Pens, dremels, scribes, strapped/taped to extruders;)I have my own idea of a metered syringe to make silicone gaskets, where I'd like to snap a plastic nozzle with a flexible feeder hose to it. Hi again, I was active on this topic some years ago. Nice to see progress and that a continuous laser mode is now available.

My CO2 laser has been dismounted but my laser diode printer is still live and working very well with the Marlin I worked on earlier in this issue. Eventually I couldn't keep up with the changes made here so still at a much older version. Perhaps we can improve on the laser functionality a bit, I can spend some time on it.

I think there are two issues really that can be addressed.Continuous laser mode/constant laser intensity have the problem that when the speed changes so does the power transferred to the surface. Longer exposure = more burn/darkness, same effect as higher intensity. That's why engraving with continuous laser intensity always gets darker at the edges where the head needs to slow down to change direction. The buildlog laser implementation had a special mode for that LASERPULSE which fixed that issue. I think an even easier way is to vary the laser intensity with the speed. That is, intensity to the laser is = (specified laser intensity).(real speed)/(set speed Fxx).

This needs to be in the stepper ISR and evaluated and adjusted at every step. This way every piece of the lasered path will get the same amount of laser energy. This way even engraving using contunous laser intensity mode will get a decent result with consistent gray scale over the whole engraved area. However, the speed may not be all that great when engraving this way.The raster mode (G7 mode) is really where it really shines. Good speed, good results.

Now, the buildlog uses a pseudo-axis for that. It isn't a real axis but in the stepper ISR it is treated as an axis and steps are counted just like a real axis. I think, why not treat it as a real axis, like E1 or so. With some luck all configurations/kinematics like delta maybe can be supported. This is pulsed mode where every pixel is fired with a pulse of a certain intensity.

The axle E1 determines the firing point and need to carry along the intensity setting for the pixels. A laserpulse function is need to do the actual firing. Two arguments, intensity and duration.I see there are a lot of changes in the stepper isr and I need guidance to find my way there. /. Spindle & Laser control.

Add the M3, M4, and M5 commands to turn the spindle/laser on and off, and. to set spindle speed, spindle direction, and laser power.

SuperPid is a router/spindle speed controller used in the CNC milling community. Marlin can be used to turn the spindle on and off.

It can also be used to set. the spindle speed from 5,000 to 30,000 RPM. You'll need to select a pin for the ON/OFF function and optionally choose a 0-5V. hardware PWM pin for the speed control and a pin for the rotation direction. See for more config details./ //#define SPINDLELASERENABLEIt enables the proper use of M3/ M4 and M5. If I enable the define SPINDLELASERENABLE, is this compatible with a normal 3D printing use?

Because I don't want to reflash Marlin firmware every time I want to switch from laser to 3dprinting and back.Once you configure the spindle/laser options, you can then use M3/ M4/ M5 to control the spindle or laser. It doesn't conflict with 3D printing.The pins SPINDLELASERPWMPIN, SPINDLELASERENABLEPIN, and SPINDLEDIRPIN are pre-defined in most pins files. For example, in the RAMPS pins file. If I enable the define SPINDLELASERENABLE, is this compatible with anormal 3D printing use? Because I don't want to reflash Marlin firmwareevery time I want to switch from laser to 3dprinting and back.Once you configure the spindle/laser options, you can then use M3/M4/M5to control the spindle or laser. It doesn't conflict with 3D printing.These pins SPINDLELASERPWMPIN, SPINDLELASERENABLEPIN, andSPINDLEDIRPIN are pre-defined in most pins files.

Currently, I am using the electrical signal coming from the gate of themosfet for FAN0 as command for my PWM laser module instead of the onecoming from the D9-labelled signal coming out of the RAMPS.I first tried to use the RAMPS switched 12V signal, by transforming it backto a valid TTL PWM signal, but finally I gave up to using the signal of themosfet gate, which is a nice 0-5V PMW signal (on pin D9 of the ArduinoMEGA).L.OUIS2018-03-19 11:13 GMT+01:00 Scott Lahteine.

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