Welcome to the SeeMeCNC Community

So I got a Bondtech QR, however, I am curious how I make sure that the current is set correctly for the stepper. I assume that I need to adjust the MOTOR_CURRENT setting in the firmware. First of all is this the correct setting? If it is not what am I looking for?

Currently this is set to #define MOTOR_CURRENT {140,140,140,130,0} with the 130 being the extruder setting.

I found this: http://reprap.org/wiki/Rambo_firmware#Motor_Current but the last equation is kind of throwing me off.

So can someone help me understand this or point to some better documentation?

Thanks

Hi.

The minimum current the rambo can put out is zero, the max is 2 amps.

the current value you see in arduino are a value between 0 and 255, where 0 is 0 Amps, and 255 is two amps.

so if 255value = 2 amps a ratio

255/2 = 127.5

x/1.2 = 127.5

x = 1.2 * 127.5

new value = 153

i hope i'm doing the maths right.

Thanks