Problem with China clone Ultimaker 2 2.1.4 (max current)

I hade a problem with my verry verry cheap China clone Ultimaker board Ver. 2.1.4
The stepper of the Z axis and all the other axis worked but they had no torque.
After a long search I found the reason.
The current sense resistance are wrong, it should be 0.05 Ohm and mounted are 0.5 Ohm. First I thought that my mechanic was to strong so I decide to a test and connected an external stepper driver on the testpins and the mechanic is not the problem. In the video you can see my test and I added 2 pictures 1 from the wrong resistor and the other ist the schematics of the driver.

3 thoughts on “Problem with China clone Ultimaker 2 2.1.4 (max current)

    • Hi,
      I changed I changed the resistor on all axis. I mounted on all also an heatsink for cooling.
      I changed nothing more.
      Greats Daniel

      • Hello again 😉

        So you changed all 10 Smd resistors?!
        Series 805 metallfilm resistors aren‘t really cheap.
        0,125 w?

        Greetz Oliver

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