"The GPIO4D includes a brake output for each axis that turns on to release the brake anytime that the motor is enabled. The brake is on a spring return and engages when power is removed from the system and/or the enables are taken away from the axis." (AJAX SCOTT)
I ran across this while checking out some posts. How do you interface with this? Could it be used to operate an air powered spindle brake for the Z without tying up other IO?
Thanks
**RESOLVED** AJAX AXIS BRAKE
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Re: AJAX AXIS BRAKE
Were you referring to the brake out that is to be wired to the drives? I thought that this was so the drives could brake the motor. I don't think the AMC's have that option do they?
Re: AJAX AXIS BRAKE
In your first post, it is unclear whether you are asking about a spindle brake (one that stops the tool from rotating) or a Z axis brake (one that prevents linear Z movement).
The brake outputs on the GPIO4D control servo axis brakes. They are generally for use with servo motors that have integral holding brakes, used to hold the motor in place when power is off. Axis brakes are *not* used to decelerate an axis during controlled operation. As a rule, servo axis holding brakes are applied by springs, and released with power.
You would need to install a relay to control the brake. One side of the relay coil would be connected to a positive voltage (e.g. +24VDC). The other side of the relay coil would be connected to the appropriate BRK output of the GPIO4D. You would connect the negative side of the relay coil supply (e.g. 0VDC) to the output common terminal on the GPIO4D. You would then wire the power which was required to release the brake through a normally-open contact of the relay. You always keep the brake power supply isolated from the logic supplies which are connected to the GPIO4D header.
If you are looking to control a spindle air brake to decelerate and/or hold the spindle and prevent the tool from rotating, you need to either use a PLC output for that. If you are out of PLC outputs, and you are using an inverter to drive your spindle, you could control the spindle brake using a zero-speed output from your inverter.
The brake outputs on the GPIO4D control servo axis brakes. They are generally for use with servo motors that have integral holding brakes, used to hold the motor in place when power is off. Axis brakes are *not* used to decelerate an axis during controlled operation. As a rule, servo axis holding brakes are applied by springs, and released with power.
You would need to install a relay to control the brake. One side of the relay coil would be connected to a positive voltage (e.g. +24VDC). The other side of the relay coil would be connected to the appropriate BRK output of the GPIO4D. You would connect the negative side of the relay coil supply (e.g. 0VDC) to the output common terminal on the GPIO4D. You would then wire the power which was required to release the brake through a normally-open contact of the relay. You always keep the brake power supply isolated from the logic supplies which are connected to the GPIO4D header.
If you are looking to control a spindle air brake to decelerate and/or hold the spindle and prevent the tool from rotating, you need to either use a PLC output for that. If you are out of PLC outputs, and you are using an inverter to drive your spindle, you could control the spindle brake using a zero-speed output from your inverter.