Bubblejunk
May 22, 2019

Changing the A4988s into TMC2100

Been looking into changing the Z axis and extruder stepper drivers from A4988 to TMC2100 (just ordered 2).

 

So I searched stuff about it and came upon https://www.youtube.com/watch?v=H41hIXdB6js this video that shows this upgrade on MKS GEN_L board on Ender 3. He takes out all the jumpers out and then set Vref from max current of the stepper motors (for Ender 3 XYZ 0.84 and E 1A) and inverts the steppers from Marlin code.

 

As the Z and E A4988 trimpots were setup to different values I should probably just not use max 1A current for both. From what current value I should calculate the Vref from?

0 comments0 replies
New Posts
  • Lee Hamilton Cooper
    3 days ago

    TMC2208 - Marlin

    Question 
    I’ve recently upgraded to the TMC2208’s and the bed will no longer home in the centre. Looking through the marlin firmware I can see that the X & Y clearly state the old TMC1200. if upgrading to the new TMC2208’s does the firmware need to updated?
  • Starbeamrainbowlabs
    a day ago

    Recycling PLA filament

    Discussion 
    Hello, I backed the Axis 3D Kickstarter a few months ago, and while I'm waiting for it to be delivered in ~April-May time (it'll be my 1st 3D printer!) I've been ding some research about filament. I live in the East Riding of Yorkshire, and my council does not collect PLA for recycling / composting. What's the best way to responsibly dispose of it - e.g. failed prints etc? If there's no good way to do so, are there any alternative filaments that are easier to responsibly dispose of at the end of their useful life?
  • Lee Hamilton Cooper
    6 days ago

    Hot Head 2 - Temperature Fluctuations

    Discussion 
    Anyone know why I'm getting such wild temperature fluctuations on my 2nd hot head? Set at 195oC and as you can see from the image it fluctuates between 187oC and 207oC which is obviously too much of a variance. Hot head 1 is working perfectly and only fluctuates ~1oC