Have you tried to get customer support from PCQ or is it not even in operation any longer? I didn't think they were all that great back when I had it.
I also went with PCQ just to see if I liked quilting at all and I did. Started with the Viking MegaQuilter 9 inch, moved up to the Juki 98Q stretched to 18 inch but by then I had the MQR retroffited PCQ which I'll tell you now is no longer around. Finally moved up to an Innova 26 and upgraded the MQR for the larger machine until the support moved to Canada and vanished. Now I have the IQ on my Innova and I couldn't be happier.
As someone mentioned check out used machines with robotics, try it out and see if it fits your style as not all do. Hope you figure out the problem with your PCQ now though. Maybe a wire got loosened, threads in the wheels, wheels/encoders slipped off, etc.