Hi Everyone,
How to step to step with CNC calibration?
I already build MPCNC but I haven’t tried to cutting any material with MPCNC yet, I was test with 12mm circle using pen, but they draw circle is over 12mm, Circle is about 800mm to drawing that is incorrect.
I expect calibration for min and max of X Y Z and cutting correct size.
I was researched internet and they show me different way to calibration and different of CNC machine, which is not same as mine.
Before using the pen, just send a 10mm movement command and make sure it moves only 10mm. Test this in each direction. After that, use the test crown gcode to make sure the machine can draw that. At that point, you can follow the estlcam basics tutorial to properly set up your CAM.
My guess is you have something wrong like units, and you need to isolate where the problem is.
I cant afford for estlcam software, so there are another software to calibration MPCNC?
What type of problem do I have for MPCNC?’
I knew only CNC Shield switches has problem, I add replay for protect from far running.
You really can drive the machine with a serial interface and use some basic gcode. Are you using marlin?
Im using GRBL because Im using CNC Shield V3
CNCjs or universal gcode sender to send gcode. Calibration in what way?
Now Im using UGS but I want to learn how to calibration MPCNC by UGS or another free software.
Estlcam is free, with a nag box.
Use cncjs or UGS and send some 10mm commands in each direction. If an axis doesn’t move 10mm, then you have something wrong. Tell us how far it moved and we can probably guess the issue. The steps/mm should be 100,100,400.
Then run the test crown (with cncjs or UGS), you don’t need estlcam to do that. Then you can use estlcam or whatever cam, but you will at least know any future problems are in the cam setup, not the machine.
Grbl gcode is quite good, just send g91g0x10 if in mm or g91g0x1 to move 1” in x if you are using inch units. G91 is incremental move, G90 is absolute. $$ gives you a listing of the setup parameters and you can adjust the steps to dial in the machine.
My stepper motor x and y is 0.9 degree and micro-stepper is full-step and it has no jumper,
Do I need change CNC Shield micro-stepper to correct for 10mm?
This calculator says 25 steps per mm, assuming youve got 16 tooth pulleys.
I think it should be 12.5
400 steps/turn * 1turn/16teeth * 1tooth/2mm = 12.5steps/mm
You should be able to get some stuff done with that, but I would prefer going to at least 8microsteps/step, if not 16/32.
2mm pitch
6mm width
0.9 degree stepper motor
1/8 driver microstepper
16 pulley teeth
What that result number for?
What I do with it?
When I choose 1/8 microstepper
Result show me 100
When I choose 1/16 microstepper
Result show me 200
Which is correct result for MPCNC?
Those results look correct, I think the 0.9 degree steppers provide slightly less torque, I would try 8 steps first.
you mean try 1/8 microstep?
Yes, try 8 microsteps first, that’s 400 X 8 per revolution.
