Repair Acrylic Y-Carriage Geeetech I3
Description
Acrylic is a good material for a printer frame, it is strong and stable. Unfortunately, it has the flexibility of glass. When I was tying some cabling underneath a printer I was assembling, the Y carriage slid forward and the bed struck an object before the carriage hit the same object, resulting in breaking out one bed mounting hole and cracking another. This is a classic case of a 3D printer to the rescue, unfortunately it takes a functioning 3D printer fo fix a 3D printer that is broken like this. These repair parts consist of two pieces that are epoxied to each side of the broken carriage (blue part), and a nut holder (red) to hold the bed adjusting nut from turning while you are turning the screw above. They are designed to fit a 8 mm nominal acrylic plate with a hole that is offset 5 mm in each direction. If you broke out the acrylic material, it is best to glue it back in place with superglue before applying the patching corners. You might be able to get the printer back in business temporarily with just superglue and some oversize washers on the bottom. If you don't have the pieces, it will take a different technique to fill the broken out area with epoxy and then re-drill the hole through patch. I used a metal-filled epoxy (JB Weld) and a spring clamp to install the corner patches, 2 at a time, since I had previously glued the broken acrylic back in place. The two pieces leave a very small gap between the patches using plate material I had. The acrylic surfaces have to be sanded to get good ahesion by the epoxy. I used standard PLA, because I didn't have any higher temperature material. To minimize the heat transfer into the PLA from the screw that passes through the heated bed, I added a fiber washer above the Y carriage patch. A similar washer above the nut holder would be a good idea also if you experience that the screws are getting too warm. A SIMPLE FIX THAT COULD HAVE PREVENTED THIS WOULD BE TO USE A SPRING CLAMP ON THE Y CARRIAGE BELT SO IT LOCKS-TOGETHER THE TWO BELT PIECES COMING FROM THE PULLEY. THE CLAMP PREVENTS THE CARRIAGE FROM MOVING.
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