Help..Propeller to dual MotorMount w Position controllers and dual HB-25s using
johnsoperV52
Posts: 10
Has any one tested MPC_Roll_Demo.spin in this specific configuration? i.e.
Demo of the Wheel and Motor Mount kit (27971) and HB-25's (29144). Uses the Simple-Serial.spin object that is included with the Propeller Tool.
After confirming I have conformed to all the directionsin wiring.
The motors will not respond with any motion at all.
For troubleshooting:
1) confirmed proper connections i.e. Per MPC_Roll_Demo.spin Schematic.
2) confirmed all components and connectors and cables good and hooked per directions.
3) I successfully ran the same motor configuration·and position controller with BS2 using the BS2 Demo, i.e. per
http://www.parallax.com/Portals/0/Downloads/docs/prod/motors/PositionControllerTestInterface(v1_2_1).zip
4) I have Digital Storage Scope waveform captures of communications from Prop "I/O Pin" and "Data Pin" on Position Controller and I have analyzed them bit for bit and the bit wise logic is consistent with page 17 (Communications Protocol) of http://www.parallax.com/Portals/0/Downloads/docs/prod/motors/27971-MotorMount-v1.3.pdf.
I have for comparison captured BS2 waveforms that actually result in proper expected motor motion.
There logic bit for bit compares but that is not the problem, I suspect w2rong in timing , i.e. the start bit has a significant voltage transition uSecondsbefore each Start Bit.
The problem with the Propeller· version of this experiment is 3.3 volt to 5 Volt and the interactions between the electronics in the Prop and Position Sensor.
The waveforms and a viewer are available for the request for any intrepid soul that can help.
Demo of the Wheel and Motor Mount kit (27971) and HB-25's (29144). Uses the Simple-Serial.spin object that is included with the Propeller Tool.
After confirming I have conformed to all the directionsin wiring.
The motors will not respond with any motion at all.
For troubleshooting:
1) confirmed proper connections i.e. Per MPC_Roll_Demo.spin Schematic.
2) confirmed all components and connectors and cables good and hooked per directions.
3) I successfully ran the same motor configuration·and position controller with BS2 using the BS2 Demo, i.e. per
http://www.parallax.com/Portals/0/Downloads/docs/prod/motors/PositionControllerTestInterface(v1_2_1).zip
4) I have Digital Storage Scope waveform captures of communications from Prop "I/O Pin" and "Data Pin" on Position Controller and I have analyzed them bit for bit and the bit wise logic is consistent with page 17 (Communications Protocol) of http://www.parallax.com/Portals/0/Downloads/docs/prod/motors/27971-MotorMount-v1.3.pdf.
I have for comparison captured BS2 waveforms that actually result in proper expected motor motion.
There logic bit for bit compares but that is not the problem, I suspect w2rong in timing , i.e. the start bit has a significant voltage transition uSecondsbefore each Start Bit.
The problem with the Propeller· version of this experiment is 3.3 volt to 5 Volt and the interactions between the electronics in the Prop and Position Sensor.
The waveforms and a viewer are available for the request for any intrepid soul that can help.
Comments
The call to Simple_Serial.spin needed a delay following that call, 500mSec is needed for Simple_Spin to initialize for proper use.
Thank You Tech Support, Josh.