All six motors turn by themselves after I flashed the test firmware

[PCrnjak]

Which product?

PAROL6

Your question

Asked often on Discord; posted here with the answer so it can be found.

I flashed the control board test firmware to check my wiring. As soon as the board boots, all motors start turning slowly, without any command, and nothing I send stops them. Is my board faulty?

What have you tried?

Control board test firmware, release 1.

[PCrnjak]

Your board is fine: this is how the test firmware behaves (known issue KI-8). It enables all six drivers when it boots and turns every motor slowly, with no limits and no homing, until you switch the power off. No command stops the motors.

• Run the test firmware only with the arm free to move, or with the motors unmounted.
• Never run it on a robot folded against its stops.
• Switch the power off to stop it, and flash the main firmware again for normal use.

Details: The test firmware and the known issues.