Hello make community, I've lurked here for some time but now I have a question worthy of posting. The Santa Barbara Hackerspace recently acquired a Yamaha yk440 scara robotic arm and qrc-2 controller. The qrc-2 controller fires up and we get an error on the mdp ( programming pendant) and after some investigation it looks like we have a power supply issue. I've contacted Yamaha USA but they do not have any documentation on a machine this old. My hope is someone in the maker community can point me in the direction of some resources to repair or replace the pay or parts in the controller or has some experience with these machines. Thank you for any help you can give.
I've gone over most of it with a multi-meter and it looks like power is good, just no 24vdc output to the arm. and putting 24vdc with a seperate psu out to the arm doesnt seem to do much good, so it seems the arm PSU is the problem.
yes we checked those, no worries, always pays to start from the beggining. Some new info, we bypassed the power supply we thought was the issue, and it still received the same errors. So we know its not a power supply issue. We receive a CPU halt 22.22 and 22.21 errors (driver output board 1 and 2 not found). Having eliminated the PSU as the source of our issues we're looking to other parts of the controller. Will update as we find more.
Welp, after a lot of digging and phone calls to yamaha and ebay searches, we've given up on the original controller and opted to build our own. Luckily theyre DC servo motors so it should be much simpler than if they were BLDCs.