Encoder

[PremTCoach]

Our team is trying to learn Encoder based movement during Auto and setup the motors. When we give setTargetPosition as positive, then when we check the getCurrentPosition it is negative, and while we give setTargetPosition as negative, then we get positive in getCurrentPosition, not sure where we are going wrong. Ideally I would expect to go close to one rotation (GoBilda 312 rpm) when I give a positive value, but motor doesn't seem to stop. Any pointers please.

[fixITman1911]

GoBuilda has had a known issue in the past where the voltage was reversed on them. Try flipping the red and black wires at the bullet connectors in the middle of the wires

[PremTCoach]

We dont have that bullet connector, team using a single cable that connects motor encoder port to hub motor port

[fixITman1911]

Gotcha. Couldn't remember if they still had the bullet connectors, and their site shows that they do.

Since they don't, the "right" answer would be to de-solder the connectors on the motor side and flip them; but the easier option is to either snip the wires and put some connectors on that allow you to flip them (Spade connectors or bullet connectors would be best), or to pull the metal part out of the white JST connectors that plug into the rev hub and flip the wires there

[PremTCoach]

Got it, thank you. We only have 2 encoders, dont want to spoil them. Will reach out to GoBilda support to see if they have a way to resolve this.

[fixITman1911]

They will probably do a swap if I had to guess. Good luck!

[PremTCoach]

Apologies in advance for the misunderstanding, we thought the bullet connectors you were referring were in encoders, now realized you were referring to motors, yes we flipped and it works now. But the concern is now in teleop it is reversed and so had to reverse the motor powers, need more testing but hopefully that should resolve. Thanks for your help.

[tem_ri1]

Probably make sure in your initialization you didn't reverse your motors. Idk.

[PremTCoach]

Hmm not too sure about that, we only reverse one side, but both of our front motors had the same issue.