Powers of two problems with stepper motors are usually related to micro-step settings in firmware or jumpers missing from your board. You didn't provide an exact measurement to work from, so I can't say if this applies or not.
Did you try hooking up your extruder to the X axis connector on your board and see if it turns that way? This would rule out the firmware and a controller problem as possible causes.
I bought what is arguably the most expensive Bowden extruder on the market, and it only turned 1/2 revolution before it didn't work any more. Turns out that the set screw on the hobbed gear stuck up ever-so-slightly above the surface of the gear, and it got hooked on the filament guide as it turned. I was cursing the manufacturer for about 10 minutes as I cut a clearance groove into the filament guide with my Dremel, after having gone through all of the electronics and wiring troubleshooting steps. Long story short, check the mechanicals first.....
Did you try hooking up your extruder to the X axis connector on your board and see if it turns that way? This would rule out the firmware and a controller problem as possible causes.
I bought what is arguably the most expensive Bowden extruder on the market, and it only turned 1/2 revolution before it didn't work any more. Turns out that the set screw on the hobbed gear stuck up ever-so-slightly above the surface of the gear, and it got hooked on the filament guide as it turned. I was cursing the manufacturer for about 10 minutes as I cut a clearance groove into the filament guide with my Dremel, after having gone through all of the electronics and wiring troubleshooting steps. Long story short, check the mechanicals first.....