Jump to content
krane

reduce current motor

Recommended Posts

Posted · reduce current motor

Hey,

on my UM2, the temperature of X,Y motors is too hot (i can't let my finger on it 1s), my printer is clean and i put some oil. I intent to reduce en the firmwire the current motor max from 1300 to 1200 mA but i didn't find the line in the files...i just find in configuration_adv.h :

// actual motor currents in Amps, need as many here as DIGIPOT_I2C_NUM_CHANNELS

#define DIGIPOT_I2C_MOTOR_CURRENTS {1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0}

can someboby tell me how i can reduce the current motor max en Marlin (UM2) ?

thank you so much !

Share this post


Link to post
Share on other sites
Posted · reduce current motor

Your motors are probably fine. I think they can be up to 80C which is very hot. It's normal for them to be too hot to touch.

You can reduce the current with a simple gcode but if you do you will need to also lower the acceleration and jerk settings. I don't recomment you mess with it.

Share this post


Link to post
Share on other sites
Posted · reduce current motor

The new start code in the default UM2 profile provided in the latest version 3 of simplify3D sets the extruder motor current to 1400, any thoughts on that ?

Share this post


Link to post
Share on other sites
Posted · reduce current motor

Stepper motors do run hot. I would avoid dropping the current, there is a danger of them missing steps. I was surprised that UM2 allows changes to the currents, you could easily get very unexpected results.

Share this post


Link to post
Share on other sites
Posted · reduce current motor

My motors get really hot especially when printing ABS, because I keep the whole thing toasty by blocking all the big holes. The longest ABS print I have done is around 22 hours I think, no problems to report. So don't worry.

Another thing is the UM2 is really superbly balanced; avoid messing with anything other than what's available via the UI. Even then, take cautious steps. I have reset to factory defaults on more than one occasion when my enthusiasm outpaced my knowledge :-)

Share this post


Link to post
Share on other sites
Posted · reduce current motor

Ok, thanks to all of you.

I built a reprap BCN3D+ last week and fixing the pololu i was able to use the printer for a long time without heating that much the motors. So i get surprise to see how hot are the motors of my UM2 during a print in ABS or PLA.

really kind of you to respond with details

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Our picks

    • Ultimaker Cura 4.0 | Stable available!
      Ultimaker Cura 4.0 is mainly focused on the improved user interface and cloud integration.
      As always, we want to collect your user feedback for this release. If there are any improvements you can think of, feel free to mention it here and help us to shape the next release.
      • 65 replies
×
×
  • Create New...

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!