- The fact that when motor stops you can not turn the shaft by hand, that is absolutely normal, that is actually how it is supposed to work. What happens is that the stepper motor holds its position.
- The driver pot adjusts the peak current in the motor. It makes sense that when you do put it to minimum then motor does not have torque or does not move at all. You need to up it until the motor moves with the torque necessary for your system.
- Changing the MAX feedrate does not immediately upper the speed. If your MAX speed is 4000 and you order at speed 3000 then it accepts at 3000. Commands over 4000 will be executed at 4000 instead. This is what "maximum" word means.
- Retract is something that happens only at the end of an extrusion, that it tries to suck filament back. Something like you would try to spit then half way you stop and suck the spit back in mouth. Sry for the comparation, couldnt think at a better one.
- The E axis steps per unit value you talk about, steps per mm, that does not change the speed, it changes only the length the motor moves. You order a move 10 mm, if that value is incorrect it will move other length, like 15 mm or 5mm instead.
From what you say i do not see anything that would be obviously incorrect. I would say that things actually seem to work. About the torque, the potentiometer on the driver board adjusts that, and the formula between Vref and current peak is in the datasheet of your driver IC, look that up and check what sense resistors you have in order to figure out the exact formula, there are other posts in this thread that might help. About the speed, leave it be, the motor speed is either specified by the sender for travel moves or will be in the gcode file, or if you want to know more see the g-code reference on wiki and enter gcode commands manually specifying different speeds. For other configuration file you have to better read comments in the datasheet, these settings do exactly what they say they do. For example "steps per unit" does not have anything to do with torque. There are many sites with details about how to configure the firmware parameters, sry i dont have one to suggest, but you can search and i am sure you will find quite a number. Cheers, have fun.
- The driver pot adjusts the peak current in the motor. It makes sense that when you do put it to minimum then motor does not have torque or does not move at all. You need to up it until the motor moves with the torque necessary for your system.
- Changing the MAX feedrate does not immediately upper the speed. If your MAX speed is 4000 and you order at speed 3000 then it accepts at 3000. Commands over 4000 will be executed at 4000 instead. This is what "maximum" word means.
- Retract is something that happens only at the end of an extrusion, that it tries to suck filament back. Something like you would try to spit then half way you stop and suck the spit back in mouth. Sry for the comparation, couldnt think at a better one.
- The E axis steps per unit value you talk about, steps per mm, that does not change the speed, it changes only the length the motor moves. You order a move 10 mm, if that value is incorrect it will move other length, like 15 mm or 5mm instead.
From what you say i do not see anything that would be obviously incorrect. I would say that things actually seem to work. About the torque, the potentiometer on the driver board adjusts that, and the formula between Vref and current peak is in the datasheet of your driver IC, look that up and check what sense resistors you have in order to figure out the exact formula, there are other posts in this thread that might help. About the speed, leave it be, the motor speed is either specified by the sender for travel moves or will be in the gcode file, or if you want to know more see the g-code reference on wiki and enter gcode commands manually specifying different speeds. For other configuration file you have to better read comments in the datasheet, these settings do exactly what they say they do. For example "steps per unit" does not have anything to do with torque. There are many sites with details about how to configure the firmware parameters, sry i dont have one to suggest, but you can search and i am sure you will find quite a number. Cheers, have fun.