4 Motor Tank Drive Problem

[Alan Anderson]

I will suggest two things. First, make absolutely certain that the PWM channels you're specifying in the Open 4 Motor are the ones connected to your speed controllers. Second, try reseating the PWM connectors in the Victors; they are notoriously difficult to get right without lots of practice.

[dotbran]

Why would you need four motors for tank drive?

[pSYeNCe]

Originally Posted by dotbran

Why would you need four motors for tank drive?

Just for more power, I would imagine.

As for the actual problem, I agree that you should double check the PWMs in the program and check the physical connectors. We are using Jaguars for the same purpose without issue.

If your PWMs in the program are correct, I would think it's a hardware problem.

[dotbran]

Originally Posted by pSYeNCe

Just for more power, I would imagine.

That makes sense.

In that case, how about just doing two instances of tank drive (one for front, one for back) and setting everything to control both in parallel?

Or, are you sharing each pair of motors with each pair (L/R) of wheels?

[pSYeNCe]

Originally Posted by dotbran

In that case, how about just doing two instances of tank drive (one for front, one for back) and setting everything to control both in parallel?

Hmm, I don't see any reason why not. I'd say try that, and if that doesn't work and you're sure of the PWMs then you definitely have a hardware problem.

[Alan Anderson]

Originally Posted by dotbran

In that case, how about just doing two instances of tank drive (one for front, one for back) and setting everything to control both in parallel?

If the Open 4 Motor isn't working, two Open 2 Motors with the same four PWMs wouldn't open either.

Or, are you sharing each pair of motors with each pair (L/R) of wheels?

That is the typical way to do it, with two motors on each gearbox.

[Josh987]

Make sure you open the 4 motors in "begin" and that it is referenced properly in "teleop", "partial tasks", and "end" vi's. Also when running the code check on the drivers station to see if the PWM's are being sent a signal.