bdring / TMC2209_Pen_Laser

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Stepper motors very weak - have no torque and easily stall. #1

Open jberndt opened 3 years ago

jberndt commented 3 years ago

Hello, I'm using the TMC2209 Pen Laser V2.0 board. It's running a coreXY pen plotter with pretty standard Nema 17 motors. The issue is that I'm having is that the motors stall very easily. Simply by me putting a finger on the pen, the motors will stall and lose steps.

However, when I drive the same pen Plotter but with an Arduino Uno and a cheap Chinese CNC shield running grbl 1.1, there is no stalling at all. The torque from the motors is exactly as I'd expect. No losing steps, no stalling.

I've included the boot information and hoping that it is a simple oversite on my end. Please let me know if more information is needed.

Thank you

Screen Shot 2021-04-08 at 1 28 30 PM
bdring commented 3 years ago

Send $Current from a serial or WebUI console to see the values for the motor currents. The default is quite low to prevent overheating. Those drivers can go up to about 1.9A.

Set the current like this $X/Current/Run=0.9 X is the axis and 0.9 is the current in Amps

There are a lot more settings than regular Grbl. See this page.

https://github.com/bdring/Grbl_Esp32/wiki/Settings

Please ask followup questions on the Discord server. https://discord.gg/ZFBZAbNH

On Thu, Apr 8, 2021 at 4:00 PM jberndt @.***> wrote:

Hello, I'm using the TMC2209 Pen Laser V2.0 board. It's running a coreXY pen plotter with pretty standard Nema 17 motors. The issue is that I'm having is that the motors stall very easily. Simply by me putting a finger on the pen, the motors will stall and lose steps.

However, when I drive the same pen Plotter but with an Arduino Uno and a cheap Chinese CNC shield running grbl 1.1, there is no stalling at all. The torque from the motors is exactly as I'd expect. No losing steps, no stalling.

I've included the boot information and hoping that it is a simple oversite on my end. Please let me know if more information is needed.

Thank you

[image: Screen Shot 2021-04-08 at 1 28 30 PM] https://user-images.githubusercontent.com/10204936/114094304-022a8700-9871-11eb-87e5-7a83e782681b.png

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