Jump to content
Ultimaker Community of 3D Printing Experts

Setting driver current


ataraxis
 Share

Recommended Posts

Posted · Setting driver current

Hi everyone!

I tried to adjust the driver current to 1.7A maximum since i installed a new stepper.

In order to do so, I measured the VREF and set it from 0.65V to 0.9V.

This is my calculation:

1.7A / 0.7 = 2.43A (since the A4988 limits to around 70%)

2.43A / 2.5Ohm = 0.97V (according to https://www.pololu.com/product/1182)

=> 0.9V for safety reasons...

The problem is, now the stepper seems to be more underpowered than before (way less torque!!)

Any ideas?

Thank you!

  • Link to post
    Share on other sites

    Posted · Setting driver current

    Is it maybe possible that the driver overheats that fast? It looks like the torque drops after around one minute nonstop extruding - very strange... will measure the temperature the next days. I cannot think of any other source for that problem. btw... it's the extruder motor!

     

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
     Share

    • Our picks

      • New here? Get ahead with a free onboarding course
        Hi,
         
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 11 replies
    ×
    ×
    • Create New...