Printrbot Model 3 X/Y Axis cable chain support

thingiverse

Note: After several hours of printing with the Model 3, I'm not completely convinced this will be a complete solution to the issue. I've seen the cable sag slightly, and while it hasn't jammed yet I wouldn't put it past it to slide down. I'll leave this part up, but might try to design something that will attach to the bracket on the extruder. The printrbot Model 3 has a horizontal cable chain for the X/Y axis - while it is affixed with two screws on either end (two at the extruder, two at the frame), I don't trust that it will stay horizontal over time. Since this is a large-format printer, a failure with the cable chain binding could destroy a large print. I designed a tiny block that fits underneath the spool holder bracket. This gives the cable chain a bit of support and (hopefully!) creates a fulcrum keeping it horizontal. You will need to print both parts - one goes under the left bracket, the other the right. I printed mine with enough bottom layers to have a completely solid part between the bracket and base.