Hello Profilers,

Happy new "milling" year!

Today I looked into the thing about the resistor. The Vref on the colinbus board is quite straight on; just a simple voltage divider (correct me if I am wrong) see picture. Some resistors in serie to get the correct resistor value and a bypass capacitor to keep a clean Vref. Calculations show that Vref is 0,468 Volt and with the current Rsense (0,5ohm) it results in a max current of 0,94 amps. With an Rsense of 0,33 ohm (after mod) it should be a max current of 1,42 amps. Resulting in a desired Vref of 0,71 Volt.

This means replacing R43 by 1k2 ohm to obtain a max current of 1,402 amps.

I am going to try this variant of the mod soon and will post my practical findings.

Regards, Michel