[adescoteaux]

Hi ! I would need some help with my motors, They move very roughly and can't figure out why.

I'm using Mach3 with Kelang KL5056D Drivers with a C10 Breakout Board + Ethernet Smooth Stepper.

In jog i have a smooth movement. Only when I launch some G-Codes, my spindle is chattering way to much.

I Tried to change some parameters ( Sherline Mode, Motors Acceleration, Pulse width to 5) etc. but no success....

Please help me !

Thank you very much !

[Dan911]

Your probably in exact stop mode( G61), you want constant velocity mode "CV" (G64). If your g-code is not putting you in exact stop mode than its just a settings in Mach.

[adescoteaux]

Hi Dan911 ! Thank you for your reply.

How can I change that ? I use solidworks with HSMXPRESS.

I Post Process my GCode via the HSMXpress addon.

Help me please

[Dan911]

Open Mach 3 and click on Config tab on top, than General config and look for Motion Mode. Make sure not on "Exact Stop" and choose "Constant Velocity".

[Dan911]

Check your CV control settings and uncheck all. Also check your look ahead settings. What is your acceleration set to in motor tuning?

[adescoteaux]

Look ahead is at 200 and every CV Settings are uncheck.

Still chattering too much ... :/

Thanks !

[Dan911]

Make sure CV feederate is not on. Main screen settings ALT6

[adescoteaux]

The CV FeedRate is not on either

[Dan911]

Hmmm, when jogging smoothly and jerky when running code, what I posted for you to check is normally the cause. Here's a few more things to check.

Does your g-code have a G61(exact stop) in the beginning?

When running code but just cutting air does it still happen?

Do you have the most recent updated plugin for your ESS?

[adescoteaux]

Here is the beginning of my Gcode :
(BLOCK_OFF_RUFF)
(DECOUPE EXTERIEURE)
(T1 D=0.125 CR=0. - ZMIN=-0.3461 - FRAISE 2 TAILLES)
G90 G94 G91.1 G40 G49 G17
G20
G28 G91 Z0.
G90

(POCHE 2D1)
M5
M9
T1 M6
(2 FLUTE FLAT ENDMILL)
S5000 M3
G54
M8
G0 X0.4202 Y1.7784
G43 Z0.6 H1
Z0.2
G1 Z0.1125 F20.
G3 X0.4193 Y1.7786 Z0.1078 R0.0594
X0.4168 Y1.7789 Z0.1038 R0.0594
X0.4129 Y1.7793 Z0.1011 R0.0594
X0.4082 Y1.7794 Z0.1 R0.0594
X0.411 Y1.6606 Z0.0935 R0.0594
X0.4082 Y1.7794 Z0.087 R0.0594
X0.411 Y1.6606 Z0.0805 R0.0594
X0.4082 Y1.7794 Z0.0739 R0.0594
X0.411 Y1.6606 Z0.0674 R0.0594
X0.4082 Y1.7794 Z0.0609 R0.0594
X0.411 Y1.6606 Z0.0544 R0.0594
X0.4082 Y1.7794 Z0.0479 R0.0594
X0.411 Y1.6606 Z0.0414 R0.0594
X0.4082 Y1.7794 Z0.0349 R0.0594
X0.411 Y1.6606 Z0.0283 R0.0594
X0.4082 Y1.7794 Z0.0218 R0.0594
X0.411 Y1.6606 Z0.0153 R0.0594
X0.4082 Y1.7794 Z0.0088 R0.0594
X0.411 Y1.6606 Z0.0023 R0.0594
X0.4082 Y1.7794 Z-0.0042 R0.0594
X0.411 Y1.6606 Z-0.0107 R0.0594
X0.4082 Y1.7794 Z-0.0172 R0.0594
X0.411 Y1.6606 Z-0.0238 R0.0594
X0.4082 Y1.7794 Z-0.0303 R0.0594
X0.411 Y1.6606 Z-0.0368 R0.0594
X0.469 Y1.72 Z-0.04 R0.0594
X0.4037 R0.0326
X0.47 R0.0331 F10.
X0.285 R0.0925
X0.47 R0.0925
X0.4571 Y1.7217 R0.0066
G1 X0.451 Y1.6991

[Dan911]

Clearly there's not a G61 that I would of hoped to see. Providing you checked all settings listed in thread it's safe to assume Mach 3 motion mode/constant velocity is not your problem. I see in your first post that your Step and Dir pulse is set to 5 and your acceleration is set low so this eliminates common motor tuning settings that could cause jerky/ chatter movement.

Below is a link to another thread similar to your problem. This will give you a few more things to check. Sorry I couldn't of been more help, I will continue to reply bumping your thread in hopes someone more experienced jump in and shed new light. Good Luck!

http://www.cnczone.com/forums/showth...p?276288-Jerky movement running code, but jog is OK!

[adescoteaux]

Thanks for your help ! I really appreciate it !

[adescoteaux]

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