Hi all,
I'm posting here since bports and servos go hand in hand and maybe someone familiar with these can help me.
I have a 150 that's misbehaving. At low speed 0-3 the motor jogs and pulses when switched on in either direction. It's worse closer to 0 on the dial.
Increasing the speed past 3 stops the pulsing. the speed curve is also not right.
when speed is maxed out or rapid transverse is pushed the motor spins way way faster than my other servos. Definitely an overspeed condition.
The limit switch will stop the motor but the dynamic braking function does not work from the limit switch or directional lever switch.
I swapped circuit boards with another good 150 and it didn't make a difference. tThe suspect board works perfectly in the other servo as well so it's definitely not the board. I am also using an armature from a servo 140 but as far as I know the armatures are the same part number for both series. The field coils are different ,140 is 2 wire and 150 is 3 wire. I'm using the correct field coil. I checked the potentiometer resistance and it seemed erratic during rotational sweep.
I bought a new potentiometer from H&W thinking that would solve the issue and it didn't make a difference.
I did replace the power cord and replaced the 4-conductor cable to the limit switch. I was very meticulous, so I don't believe that's an issue.
scratching my head on this one.
Mike
I'm posting here since bports and servos go hand in hand and maybe someone familiar with these can help me.
I have a 150 that's misbehaving. At low speed 0-3 the motor jogs and pulses when switched on in either direction. It's worse closer to 0 on the dial.
Increasing the speed past 3 stops the pulsing. the speed curve is also not right.
when speed is maxed out or rapid transverse is pushed the motor spins way way faster than my other servos. Definitely an overspeed condition.
The limit switch will stop the motor but the dynamic braking function does not work from the limit switch or directional lever switch.
I swapped circuit boards with another good 150 and it didn't make a difference. tThe suspect board works perfectly in the other servo as well so it's definitely not the board. I am also using an armature from a servo 140 but as far as I know the armatures are the same part number for both series. The field coils are different ,140 is 2 wire and 150 is 3 wire. I'm using the correct field coil. I checked the potentiometer resistance and it seemed erratic during rotational sweep.
I bought a new potentiometer from H&W thinking that would solve the issue and it didn't make a difference.
I did replace the power cord and replaced the 4-conductor cable to the limit switch. I was very meticulous, so I don't believe that's an issue.
scratching my head on this one.
Mike
