Jump to content
Ultimaker Community of 3D Printing Experts
Sign in to follow this  
ataraxis

Setting driver current

Recommended Posts

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!

Share this post


Link to post
Share on other sites

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!

 

Share this post


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
Sign in to follow this  

×

Important Information

Terms of Use Privacy Policy