Print jumps 7mm in Y direction after initial layers

[old man emu]

I really think that my problem is trying to print somewhere that the room temperature is 100F. Nothing cools down under those conditions, even with an industrial sized fan blowing across it.

During my wanderings I can across this: http://reprap.org/wiki/G-code#M906:_Set_motor_currents

M906: Set motor currents

Example: M906 X300 Y500 Z200 E350
Sets the currents to send to the stepper motors for each axis. The values are in milliamps.

Has anyone used this during set up and calibration?

Old Man Emu

[printbus]

...M906: Set motor currents

Example: M906 X300 Y500 Z200 E350
Sets the currents to send to the stepper motors for each axis. The values are in milliamps.

Has anyone used this during set up and calibration?

You'd have to check your source code to see if M906 is supported. My bet is that it's not. M906 could be what is used with the Rambo electronics board, where some form of digital adjustment is involved instead of the microscopic trimpots we're familiar with on the Pololu-type driver boards used on RAMPs.