Thank you for all the helpful advice. Here’s the status at the moment. We tried building a dc motor controller and swapping in a dc motor, but after two attempts and failing both times to choose a motor with enough torque to turn the chain, we went to grainger and got the motor controller that they said would ship with the motor in there, but after wiring it up, it did not appear as though the knob would actually vary the speed. we belieive that it is perhaps wired wrong, the motor controller has two thick cables with a green, white, and black wire in each, and the old controller had 6 pins with 2 blue wires, a yellow wirea black wire a red wire, and a wire with a black and red wire spliced together on it. we will consider getting another electrician to look at it in the morning. In the meantime, an engineering student friend of mine took the old controller and wired it with a 9V battery and a series of relays on the power switch to the knob to esecially make the power cycle on and off rapidly to slow the belt down in a controllable fashion, it worked temporarily, though we’ve had a heck of a time getting a pizza out of it thoughly cooked and unburnt on the edges. I totally agree with the above comment, we know we need an Western manufactured oven ASAP, we’re in a strange situation were a local franshise has severe problems and went on a firing spree and a number of very talented individuals were unemployed, and we had to jump on some opportunities . We have an industrial conventional oven, and it kicks at over 500 degrees and we’ve been making excellent pies in it, but the limit is about 3 in a half hour, which isn’t going to cut it for long, and has paralyzed our marketing. We had this weird chinese oven sitting in storage, we’re in the process of raising some funds to replace this with something better, and just trying to make due in the meantime. Thank you to the poster that had the english translation, it led me to realize we are running this oven too hot, it was never designed to hit 500 degrees, and so the flames never shut off, at lower temperature and slower speed, it should in theory stop burning the edges before the bottom is completely cooked, we’ll try that in the morning before making the decision about whether to try another electrician to see if the grainger part was on there right, or something else. My prior experience was all been with Middleby-marshall ovens, and I’ve never had this many problems with one of them, though I hear there are even better ovens than that. I’ll check this in the morning and see if anyone else has any ideas. Thank you all once again.