Wanhao D9 bed spacer

thingiverse

The screws that secure the rollers beneath the bed were coming into contact with the frame behind the main compartment, while the deck itself was grinding against the rear stop switch. I also observed that the screws holding the rollers in place under the bed were angled when tightened properly. The flanged ends of the spacers provide additional support underneath the bed, which has successfully resolved the issue of the wheels being angled. Since the spacers are 2mm taller, you must remove the spring washers to maintain the correct screw length; this was necessary in my case because, as I mentioned earlier, the head of the screw was rubbing against the frame. Removing the spring washer granted clearance and the increased bed height prevented it from striking the rear switch.