Roboteq and "Pancake" motors

15 years 5 months ago #4112189 by cosma
Roboteq and "Pancake" motors was created by cosma
<P style="MARGIN: 0px">This is to clarify Roboteq's current experience and standing regarding the usage of the AX2550 controller family with "Pancake" motors like the Etek or Perm.
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<P style="MARGIN: 0px">These remarkable motors are capable of very high power output given their overall size.
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<P style="MARGIN: 0px">We have direct experience with the Perm 80 motor, which is of similar design as the Etek. In the summer of 2003, this motor was used by several robot builders in the UK. It's extremely low armature resistance and high inertia/high rpm, was found to cause unwanted overvoltage spikes during rapid deceleration, which eventually caused driver and MOSFET failures. This problem has been resolved with the addition of protection components that have been systematically installed in the product since September 2003. No further problem have been reported with this motor.
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<P style="MARGIN: 0px">We have indirect experience of problems with the Etek motor. Unfortunately, we have not had the opportunity to experiment with this motor in our laboratory environment and have no immediate plans to do further analysis given that this motor will be obsoleted from what we are told.
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<P style="MARGIN: 0px">We are now advising against using the Etek motors under any circumstances, and until further notice. Existing Etek/Roboteq users should not power their robot with battery voltage in excess of 24V.
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<P style="MARGIN: 0px">Etek motor users are invited to report to us, in order to help us better understand the special care required for a safe operation of this motor.

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12 years 2 months ago #27284723 by justingray
Replied by justingray on topic Re:Roboteq and "Pancake" motors
I just finished building a 400lb steel tracked robot using two etek-r motors, one per track driven by an ax2550. for some reason the motor controller is not working, I am going to plug a computer in to it tomorrow, is there any info on if the new etek has the same problem as the old ones? I assumed that if the motor controller would give these motors 120amps each it would be enough power, am i over powering the controller?


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