Braked Stepper Motor
Posted: Wed 13 Jan , 2010 11:16 am
This post covers the Braked stepper motors fitted to Denford Machines:
The motor has a double ended shaft and at the rear of the motor a hexagonal nut is secured to the shaft.
Around this nut a fibre washer is fitted which has a hexagonal hole in the middle. When the brake is released the motor shaft revolves and the nut on the rear of the shaft revolves with it also driving the fibre washer.
When the brake is on the fibre washer is clamped to the end face of the motor by spring pressure within the brake solenoid.
The fibre washer being clamped prevents the motor shaft turning.
The Brake units are a solenoid powered by 24V DC. When energised the solonoid compresses a spring releasing the fibre washer.
The first Image shows the Brake removed and the fibre washer inside the brake unit with the Hexagonal hole through it.
The second image shows the nut secured to the shaft at the rear of the unit.
The third photo shows the assembled brake unit.
The motor has a double ended shaft and at the rear of the motor a hexagonal nut is secured to the shaft.
Around this nut a fibre washer is fitted which has a hexagonal hole in the middle. When the brake is released the motor shaft revolves and the nut on the rear of the shaft revolves with it also driving the fibre washer.
When the brake is on the fibre washer is clamped to the end face of the motor by spring pressure within the brake solenoid.
The fibre washer being clamped prevents the motor shaft turning.
The Brake units are a solenoid powered by 24V DC. When energised the solonoid compresses a spring releasing the fibre washer.
The first Image shows the Brake removed and the fibre washer inside the brake unit with the Hexagonal hole through it.
The second image shows the nut secured to the shaft at the rear of the unit.
The third photo shows the assembled brake unit.