Folger Tech v-slot holder/spacer

thingiverse

This part is to upgrade the Folger Tech 2020 Prusa i3 kit with a V-slot Y axis. The setup consists of two corner brackets that account for going over the stepper in the back. My printer had issues with the bearings that came with it, doing a skipping motion instead of sliding smoothly. I decided to upgrade to the superior V-slot. Instructions Parts Needed Various M4 screws and T-nuts to match Three V-wheel kits from OpenBuilds.org part store or similar Three M5x25 screws for V-wheels One eccentric spacer from OpenBuilds.org Two 1/4" spacers 1000mm of V-slot from OpenBuilds.org part store Hack saw, miter saw, band saw, or something to cut V-slot with Step 1 On the side with a single bearing, drill out the outer bearing-holder hole to 11/16th. This will be your eccentric spacer hole. Step 2 On the side with two bearing holders, drill out the two outer holes to 1/4 inch. These will be the holes for non-eccentric mounted wheels. Step 3 Cut V-slot using a hack saw or miter saw. Precision doesn't matter as long as they're long enough for spacers to screw into them. Shoot for 16" long to span printer length. Step 4 Put wheels on, using 1/4" spacers on the side with two wheels and eccentric spacer on the side with one wheel. Make sure the eccentric spacer is as wide as possible. Don't forget shims! And don't over-tighten nuts! Order for parts: screw -> spacer -> shim -> bearing -> wheel -> bearing -> shim -> nut Step 5 Put drop-in T-nuts on the bottom and sides of spacers. Slide V-slot pieces into them and place them on the printer frame. Put the bed outside of them and push them outwards so that wheels are a little loose but not falling down. Step 6 To ensure the axis goes straight back, use a caliper or tape measure to make sure both front and back ends of one V-slot extrusion are an equal distance away from the printer's outside frame. Get it parallel by adjusting until it's headed straight back. Then, tighten this one down if it's near where you want it. With the second piece, push it out into the wheel on the other side so that it's relatively tight. Measure between the first V-slot piece and the second one and adjust until it's an equal distance away in front and back. Tighten this one down, making sure the bed's wheels are resting inside of the V slot. Step 7 Adjust the eccentric spacer until your Y axis gantry no longer wobbles. Step 8 Enjoy having silky smooth and quiet linear motion on your new, fancy Y axis!