Ord Bot Y-Axis Rack and Pinion

thingiverse

So it has been a couple of months since I completed my leadscrew upgrade to my x-axis and so far it is still working good. I was going to do a similar leadscrew upgrade to my Y-Axis, but my leadscrew supplier, Trinity Labs, has closed their doors. As a result I have decided to try another method that has been interesting me for a couple of months after seeing some positive results on thingiverse. Recently I purchased a small 12' acetal rack and spur gear from SDP/SI. The idea is to hard mount the Y-Axis motor directly underneath the heated bed and design a way to hard mount the rack to the aluminum plate. Then i will use the motor and spur gear to drive the build plate. Does anyone have any experience with this kind of drive mechanism. I have attached a mock-up of my concept. The yellow parts are printed. Basically a mount for the rack I purchased. I plan on using tension pins to hold the rack in the mount. The mount will use the same screws I used to attach the heated build platform. Here is a video of it working. http://youtu.be/pcQ9hYwiU5A Instructions SDP/SI Part Number Description Sell Unit Price S10Z05M028T0505 Module 0.5, 28 Teeth, 20° Pressure Angle, Acetal / Stainless Steel Hub Spur Gear Each $22.93 A1M12MYZ0525A Module 0.5, 20 (Deg) Pressure Angle, Acetal (Molded) Rack Each $3.38 Everything else is M5 T-Slot Nuts with M5x8 Screws