Bondtech

[sfuelberth]

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

[Qdeathstar]

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.

[sfuelberth]

Thanks