Hi,
I was setting the motor currents to their required values, following the instructions which said to turn the potentiometers on the board Melzi v2.0 till the voltage (between the - on the power connector, and the left-hand side of the potentiometer) was about 0.8V. The screws were really stiff, but i managed to turn them slowly. Near the end of their travel, the voltage had only risen upto about 0.45V, so i turned the screws a but more. When I felt some resistance i turned in the opposite direction but the screws had taken too much stress and the head simply dropped off.
Is there anything I can do now except for ordering a new board? And why do the voltages not go up to what they are supposed to? I was thinking of desoldering the surface-mounted potentiometers and putting some of my own in their place, but I do not know if that is a good idea or if so, then what voltages to set to.
Can anyone please help?
Thank you.
I was setting the motor currents to their required values, following the instructions which said to turn the potentiometers on the board Melzi v2.0 till the voltage (between the - on the power connector, and the left-hand side of the potentiometer) was about 0.8V. The screws were really stiff, but i managed to turn them slowly. Near the end of their travel, the voltage had only risen upto about 0.45V, so i turned the screws a but more. When I felt some resistance i turned in the opposite direction but the screws had taken too much stress and the head simply dropped off.
Is there anything I can do now except for ordering a new board? And why do the voltages not go up to what they are supposed to? I was thinking of desoldering the surface-mounted potentiometers and putting some of my own in their place, but I do not know if that is a good idea or if so, then what voltages to set to.
Can anyone please help?
Thank you.