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51
Share Your GCode / Re: Laser Crosshair on CNC Complete How To For Under $40
« Last post by momofr83 on February 07, 2026, 10:59:47 AM »Yes, just did it two weeks ago.
Recent Posts
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Mach4 General Discussion / Re: MACH4\pokeys57 : Controlling PWM to laser engrave in greyscales
« Last post by momofr83 on February 07, 2026, 04:53:19 AM »My remapping function of power isn't satisfying yet. I must say that i didn't take the easiest photo. I made a quick user interface (Python).
Lessons Learned :
To avoid white lines caused by a mismatch between the requested travel distances and the minimum step resolution allowed on an axis, I implemented a step-based logic where the commanded distance is computed by multiplying the number of Y-axis steps by the axis counts-per-unit value.
The same resolution was initially used for the X-axis motion; however, the system was unable to keep up with the resulting instruction rate, causing the feed rate to drop to 2400 instead of the requested 3000. As a result, the resolution had to be reduced.
Lessons Learned :
To avoid white lines caused by a mismatch between the requested travel distances and the minimum step resolution allowed on an axis, I implemented a step-based logic where the commanded distance is computed by multiplying the number of Y-axis steps by the axis counts-per-unit value.
The same resolution was initially used for the X-axis motion; however, the system was unable to keep up with the resulting instruction rate, causing the feed rate to drop to 2400 instead of the requested 3000. As a result, the resolution had to be reduced.
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General Mach Discussion / Re: Mach3 velocity setting
« Last post by Andrey67 on February 07, 2026, 03:12:36 AM »Thanks!
But in the video I see 25000Hz. And I use ESS Smoothstepper and the manufacturer recommends not to change the frequency to 25000Hz.
Is it necessary to split the step size?
But in the video I see 25000Hz. And I use ESS Smoothstepper and the manufacturer recommends not to change the frequency to 25000Hz.
Is it necessary to split the step size?
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General Mach Discussion / Re: Mach3 velocity setting
« Last post by Tweakie.CNC on February 07, 2026, 02:47:12 AM »If your machine, computer, motors & their drivers can handle the increased velocity then increase your Kernel Speed (Config / Ports & Pins). This will enable higher Velocity settings to be entered in Motor Tuning. Mach will need a restart to secure the change.
Tweakie.
Tweakie.
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General Mach Discussion / Mach3 velocity setting
« Last post by Andrey67 on February 07, 2026, 02:15:24 AM »Hello,
I can't increase the velocity value above 1114.2 mm's per min at 1500 steps per.
Why is that?
But I found a video ( https://youtu.be/e9_ye1-ISjQ?si=2RM-vy9GemApRJIv&t=368 ) where the user increases the velocity to 3000 and then to 5000 mm's per min at 1000 steps for. Why can't I do this?
I can't increase the velocity value above 1114.2 mm's per min at 1500 steps per.
Why is that?
But I found a video ( https://youtu.be/e9_ye1-ISjQ?si=2RM-vy9GemApRJIv&t=368 ) where the user increases the velocity to 3000 and then to 5000 mm's per min at 1000 steps for. Why can't I do this?
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Mach4 General Discussion / Re: MACH4\pokeys57 : Controlling PWM to laser engrave in greyscales
« Last post by momofr83 on February 06, 2026, 09:18:57 AM »I spent some time figuring why there was no difference in small power percentage, the PWM was too high (20000Hz).
With 5000Hz, gray are less quantized. I'm not sure whose the most guilty pokey's card or the laser. (I'm assuming the latter)
I'll pursue my tests and post a picture when i'm satisfied.
With 5000Hz, gray are less quantized. I'm not sure whose the most guilty pokey's card or the laser. (I'm assuming the latter)
I'll pursue my tests and post a picture when i'm satisfied.
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Mach4 General Discussion / Re: MACH4\pokeys57 : Controlling PWM to laser engrave in greyscales
« Last post by momofr83 on February 06, 2026, 04:39:13 AM »Back to my Gcode converter, configuring the ideal settings is tricky. It seems that my Laser is very sensible. It's a laser tree 80W.
With a range limit of 9.5 to 20%, I got the nuances I want but the burning wood is not a linear process. So I'm trying to change the power map and what's best than a histogram (in attachment) to see my image translation in power ?
With a range limit of 9.5 to 20%, I got the nuances I want but the burning wood is not a linear process. So I'm trying to change the power map and what's best than a histogram (in attachment) to see my image translation in power ?
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Mach4 General Discussion / Re: MACH4\pokeys57 : Controlling PWM to laser engrave in greyscales
« Last post by momofr83 on February 06, 2026, 04:22:58 AM »Note : In a Gcode, to ensure the successfull sending of the notification :
M5 -- Stop the laser in this case
M334 -- our macro to send notification
G4 P2 -- Pause 2s
M30 -- Program end
M5 -- Stop the laser in this case
M334 -- our macro to send notification
G4 P2 -- Pause 2s
M30 -- Program end
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Mach4 General Discussion / Re: MACH4\pokeys57 : Controlling PWM to laser engrave in greyscales
« Last post by momofr83 on February 06, 2026, 03:37:23 AM »I had some troubles with my macros not working anymore. I don't know why but .mcc wouldn't create. It was admin restrictions, just had to allow total control on the folder.
I took the occasion to test a notification system when the job is done on my smartphone, with the application "ntfy". I just need to add M334 at the end of every Gcode.
I took the occasion to test a notification system when the job is done on my smartphone, with the application "ntfy". I just need to add M334 at the end of every Gcode.
Code: [Select]
function m334()
local inst = mc.mcGetInstance()
local topic = "mach4_momo"
local message = "Job's done ! Wake up !"
-- curl command
local cmd = string.format('curl -d "%s" http://ntfy.sh/%s', message, topic)
mc.mcCntlSetLastError(inst, "Execution : " .. cmd)
local success, reason, code = os.execute(cmd)
if success then
mc.mcCntlSetLastError(inst, "NTFY : Success (Code " .. tostring(code) .. ")")
else
mc.mcCntlSetLastError(inst, "NTFY : Error (" .. tostring(reason) .. ")")
end
end
if (mc.mcInEditor() == 1) then
m334()
end
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Mach4 General Discussion / Re: Mach4 on 2 computers working together
« Last post by KatzYaakov on February 05, 2026, 02:17:40 PM »I use many machine 2 computer that use mach4 and one is supervisor
It's CNC with labeling station that stick the lane on prev station before boards cut
If need details send me mail
It's CNC with labeling station that stick the lane on prev station before boards cut
If need details send me mail