1. Trammell Hudson
  2. puma


puma / README.md

PUMA robot

There are three pieces to the shuffleboard robot software:

  • mdc-telnet.py: Listens to the USB serial controllers, exposes an TCP port that prints the voltage and six raw count measurements.

  • Puma.py: Contacts the telnet server and uses PumaFk.py to translate the raw counts to joint angles and XYZ position / ASN angles. Accepts commands on stdin like home, hold, and XYZ positions like 300 130 0.

  • Shuffleboard.py: Opens a TCP port to accept commands frmo the game server. Contacts the telnet server and translate commands line move 300 -5 into XYZ coordinates and ASN angles, Then uses PumaIk.py to generate raw joint commands to send the arm to the desired position.

To startup the arm:


Power up the the arm.

Use the brake release switch to pose the arm into the home position.

Power cycle the arm to reset the counters for the home position.

Plug in the USB if it is not already.

Run mdc-telnet.py, wait for all six axes to report.

Run Puma.py to contact the server.

Send r command to read raw joint counters,

Send a command to read the joint angles.

Send p command to print XYZ, ASN coordinates

Send hold command to hold current position

Run Shuffleboard.py to start the shuffleboard server

Run telnet localhost 27189 to verify data

To unlock the arm:

Send hold command.

Twist the E-stop to unlock the brake.

If anything looks weird -- HIT THE E-STOP SWITCH.

If the sixth axis is spinning, hit the E-stop and wait a few seconds before releasing it.

Sometimes it takes two or three times to settle back down.

To calibrate the arm positions at different distances:

Values are in Shuffleboard.py function map_z.

Yes, it could be written in a much better fashion.

To test, send a command from the Puma.py program:

350 130 0

And then adjust the Z value downwards:

350 130 -20

350 130 -30

350 130 -35, etc

Write that value into the map_z function.