hello,
i have a problem with my robot sk6. while servo off, U axis slowly drop down. I already change the motor, and speed reducer seems like in good condition with no backlash.. Anyone can help?
hello,
i have a problem with my robot sk6. while servo off, U axis slowly drop down. I already change the motor, and speed reducer seems like in good condition with no backlash.. Anyone can help?
Is the tool weight overloading the robot? Or the tool offset from the T-axis to cause an overload? Or is there a heavy load on the U-axis?
There isn’t much there. Motor, keyed stub shaft on the motor and into the drive. You said you replaced the motor. Is the brake good in the “new” motor?
We have this problem all the time with our motorman robots. The brakes are weak and if the payload of the tool is too great, it will cause the brake to slip. Without servo power it cannot hold itself in the original position. Was the "new" motor a reworked motor? If it was I would replace it with an actual new motor because reworks will sometimes miss the brake if there was some other issue with the motor. Also, I would disconnect the brake cable from the motor and see if it still drops with servo power off. Check to see if you are getting voltage through the brake cable when servo power is off. I believe it is 24V to release the brake, but if there is a voltage leak into the brake, it might allow it to slightly disengage. If you are getting any voltage reading whatsoever, while the brake should be engaged, I would start tracking that voltage reading from the robot harness through the cables and back to the controller.
Was the "new" motor a reworked motor? If it was I would replace it with an actual new motor because reworks will sometimes miss the brake if there was some other issue with the motor.
This is a 20+ year old robot. Yaskawa quit supporting the MRC controller several years ago. Chances of finding to new motor is very slim.
I believe it is 24V to release the brake, but if there is a voltage leak into the brake, it might allow it to slightly disengage.
90 Vdc on controllers older than NX100.
This is a 20+ year old robot. Yaskawa quit supporting the MRC controller several years ago. Chances of finding to new motor is very slim.
90 Vdc on controllers older than NX100.
You are the man! That's good information to have in case I run into an ancient robot like this.