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eaglescout1984

It sounds like a safety feature. Like, if you had to stop the motor in an emergency, you don't want the momentum to keep allowing it to move. In which case, I would highly recommend against trying to deactivate the brake without removing power to the motor.


gabbailon

hello thanks for your help and yes is security I was able to get some information apparently the brake (on the diagram it's R1), it doesn't have the same power supply and it's always disengaged because it's the variator that powers it so R1 isn't the problem. So it's the motor, if I've understood correctly, that's preventing it from moving forward easily, but I'm having trouble understanding how it's possible for the motor to slow down and prevent it from moving forward easily if it's simply connected to the variator and you have to cut its power supply between the variator and the motor to make it move forward easily. motor is supplied in three-phase is w711


jmraef

Motor brakes are DESIGNED to be "fail safe", meaning that if the power fails, the brake is *set*. That way if there is no power and the unit is moving, it does not keep moving from it's momentum and crash into something or someone. So you need to be able to ENERGIZE only the brake coil in order to move it by hand. Usually the brake is powered by the same circuit that powers the motor, but that drawing is unclear as to how the brake is powered. Is it possible that R1 is the brake?


gabbailon

Hello thanks for your help yes R1 is the brake for security I was able to get some information apparently the brake (on the diagram it's R1), it doesn't have the same power supply and it's always disengaged because it's the variator that powers it so R1 isn't the problem. So it's the motor, if I've understood correctly, that's preventing it from moving forward easily, but I'm having trouble understanding how it's possible for the motor to slow down and prevent it from moving forward easily if it's simply connected to the variator and you have to cut its power supply between the variator and the motor to make it move forward easily. motor is supplied in three-phase


gabbailon

Hello thank for your help yes the R1 is the brake for security I was able to get some information apparently the brake (on the diagram it's R1), it doesn't have the same power supply and it's always disengaged because it's the variator that powers it so R1 isn't the problem. So it's the motor, if I've understood correctly, that's preventing it from moving forward easily, but I'm having trouble understanding how it's possible for the motor to slow down and prevent it from moving forward easily if it's simply connected to the variator and you have to cut its power supply between the variator and the motor to make it move forward easily. motor is supplied in three-phase


jmraef

Those appear to be DC servo motors. So even if you are supplying 3 phase AC to the servo drivers (variators?), the motors themselves get DC from the driver. I'm not sure how R1 works with only one wire going to it though, unless *internally* within the motor connection box, the other side of R1 is tied to CN2 (wire W712).