Top X carriage rod getting stuck from time to time, weird pattern  

Re: Top X carriage rod getting stuck from time to time, weird pattern

do you use drylin bearings (which normally shouldn't be lubricated) ?
seems like binding due to a slight misalignment between the two upper bearings at the x-axis carriage.

Re: Top X carriage rod getting stuck from time to time, weird pattern

Yes I use dryLin, and use the dry teflon spray.

Can it also have something to do with the tensioners on the PSU side of X carriage?

I will try to reseat the bearings again..

Re: Top X carriage rod getting stuck from time to time, weird pattern

...
Can it also have something to do with the tensioners on the PSU side of X carriage?...

❓ do you mean the two m3 screws at the right side of the x-end idler part (with their square nuts assembled inside the notches of the x-end idler part) ?
➡ they are not ment to tension the x-belt ! they are simply to adjust the overall length of the x-carriage, including the rods, to a length that fits the distance between the two z-axis rods and the z-axis spindles.

if the length is properly adjusted, you shouldn't notice any out- or inwards force provided by the x-carriage at the z-rods. neither in bottom nor in top position ❗

Re: Top X carriage rod getting stuck from time to time, weird pattern

Apparently I might have had my zip ties on the bearings tightened too much. Replacing the zip ties with less pressure fixed the issue. Yay. 🙂

Re: Top X carriage rod getting stuck from time to time, weird pattern

Hot news from igus :

My new SWM-08 rods get some surface rust.

Drylin and lubricating

Symptom:
The linear bearing system ran smoothly for a number of cycles, but after a number of cycles, friction forces increased or binding occurred.

Solution:
Plastic bushings are a great alternative to metal ball bearings since they are dry-running and do not require external lubrication. igus®’ line of plastic bushings, for example, use dry lubricants such as PTFE and silicone.

Thomas