Jerky movement of steppers with UCCNC but not with Mach3

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Re: Jerky movement of steppers with UCCNC but not with Mach3

Postby Mrgreenjeans » Wed Sep 05, 2018 5:42 am

ger21 wrote:Then try a little higher.
The difference between UCCNC and Mach3 is that UCCNC will follow the path exactly, unless you specify how far away it can deviate.
Mach3 just tries to maintain velocity, regardless of how far it may stray from the path.

Because of this, If your machine can accelerate fast enough, you can run at much higher speeds than Mach3, while actually having a higher level of precision.

What CAM are you using for this? If it was coded with G2/G3 moves it would be perfectly smooth.



To be honest I don't remember for sure what I used to create the gcode. I just was making a polishing wheel from mdf while in the garage and whipped it up and when I ran it was when I noticed how bad it was running. It may have been from inkscape or artcam probably artcam.
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Re: Jerky movement of steppers with UCCNC but not with Mach3

Postby ger21 » Wed Sep 05, 2018 11:33 am

Try this code.

G90G80G20G49
M6 T2
(Tool Number:2) (0.246 inches dia. slot drill)
G43 H2 G0Z0.7500
M3 S15000
G0 Z0.75
G0 X-0.0292 Y0
G1 Z0.5 F100
G2 X-.0292 Y0 I.0292 J0 Z0.375 F25
G2 X-.0292 Y0 I.0292 J0 Z0.25
G2 X-.0292 Y0 I.0292 J0 Z0.125
G2 X-.0292 Y0 I.0292 J0 Z0.0
G2 X-.0292 Y0 I.0292 J0 Z0.0
G0 Z0.75
G0 X-2.373 Y0
G1 Z0.5 F100
G2 X-2.373 Y0 I2.373 J0 Z0.375
G2 X-2.373 Y0 I2.373 J0 Z0.25
G2 X-2.373 Y0 I2.373 J0 Z0.125
G2 X-2.373 Y0 I2.373 J0 Z0.0
G2 X-2.373 Y0 I2.373 J0 Z0.0
G0 Z0.75
G0 X0 Y0
M5
M30
Gerry
UCCNC 2022 Screenset - http://www.thecncwoodworker.com/2022.html
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