I had a Chinese seller print my printed parts and ordered a bunch of LM8UU bearings with extras (so I can skip the duds / rough ones). Fairly normal for starting out as I understand.
For the x carriage I picked out 3 of the best bearings in the bunch, the ones with the least resistance and popped them into the carriage.
However when I put the bearings in the carriage movement of the rod that goes in the side with 2 bearings becomes very high resistance, janky, and noisy when moving the bar hand. This is not related to any other part of the x axis or a result of one of the bearings being rough. As the bearings move relatively smoothly when not in the carriage and simply inserting a bar into the 2 bearings the resistance can be felt as you move the one bar.
I'm using the pushfit x carriage. I don't have the latest modifications, so I'm using the earlier model.
For now I'm using a single bearing in both slots on the carriage but it may be worthwhile to resurrect a variation of the zip tie carriage model at least as a recommendation when sourcing 3rd party printed parts to build a printer from scratch. From what I recall holding bearings in place with a single zip tie (rather than two) helps the bearings self-align. Perhaps a hybrid with a push fit channel for the single bearing and 2 slots that use a single zip tie instead of two.
I had a Chinese seller print my printed parts and ordered a bunch of LM8UU bearings with extras (so I can skip the duds / rough ones). Fairly normal for starting out as I understand.
For the x carriage I picked out 3 of the best bearings in the bunch, the ones with the least resistance and popped them into the carriage.
However when I put the bearings in the carriage movement of the rod that goes in the side with 2 bearings becomes very high resistance, janky, and noisy when moving the bar hand. This is not related to any other part of the x axis or a result of one of the bearings being rough. As the bearings move relatively smoothly when not in the carriage and simply inserting a bar into the 2 bearings the resistance can be felt as you move the one bar.
I'm using the pushfit x carriage. I don't have the latest modifications, so I'm using the earlier model.
For now I'm using a single bearing in both slots on the carriage but it may be worthwhile to resurrect a variation of the zip tie carriage model at least as a recommendation when sourcing 3rd party printed parts to build a printer from scratch. From what I recall holding bearings in place with a single zip tie (rather than two) helps the bearings self-align. Perhaps a hybrid with a push fit channel for the single bearing and 2 slots that use a single zip tie instead of two.