June 20, 2018 at 1:30 pm #61957
Hello, I am having trouble with my 3d prints
Z axis looks great, x and y show wobble.
Attached are photos of z and x/y on a calibration cube
Attachments:June 20, 2018 at 1:36 pm #61961
Something is very wrong. Did a bearing fall out, extruder extremely loose??June 20, 2018 at 1:42 pm #61968
Sorry forgot the usual biz, it’s the 23.5mm build 30″x 30″ x4″
Electronics and cables we’re bought on this site. The printed parts were made from pla on an Anet a8 at .2
The printer didn’t exhibit the issue pre fire. I had to replace the feet, one of the legs, one of the roller assemblies to make it functional to this degree
I tightened the belts a bunch (just shy of over tightened)
I also tightened up the tension bolds until the gantry started to bite/slip and then backed them off a bitJune 20, 2018 at 2:29 pm #61971
There definitely is some slop in the center column, but what is seriously odd is it isn’t on either axis, it jiggles at a 45degree angle,June 20, 2018 at 2:33 pm #61974
If you have a jiggle anywhere, that apart and take a closer look. Every thing on the machine is an interference fit and should zero slop.June 20, 2018 at 2:44 pm #61976
I got a bucket of spares (from a dissassembled mpcnc from my father in law, gonna see if I can rebuild the center column for more rigidityJune 21, 2018 at 8:53 am #62000
I completely disassembled the gantry, one of the XY were heat damaged (the holes were stretched from where the bolts had heated up.) I swapped out parts and reassembled
The cube looks way better.
Something I noticed this morning (wasnt there last night) is a clicking noise as the y+ rolls over a certain point. I ran my hand along the X bar at the clicking point and flecks of metal were shedding off. My initial thought was the rollers were chunking the bar but they run without clicks everywhere else. I’m going to try to turn the bar so the clicking can be moved between the rollers and see if that fixes it.
Have you ever heard of rollers take ng a chunk out of the pipe?
Attachments:June 21, 2018 at 9:00 am #62002
Here is a shot from the fire damaged XY before I disassembled it further
Attachments:June 21, 2018 at 9:01 am #62004
The zinc comes off the conduit all the time, a chunk is possible. I would guess some sort of manufacturing defect. A little twist of the conduit…all gone.June 21, 2018 at 7:14 pm #62041
I turned the rail 60degrees, and proceeded to print the new version of the foot. A little over an hour later so later the creaking returned it’s like the bearing is scooping out the metal on the pipe. I’m going to move print in another area on the bed and see if the chunking out happens again.June 21, 2018 at 7:17 pm #62042
Are you sure it isn’t just the zinc rubbing off as usual? It can make noise and will wear a line of no zinc but it should not go any further without months of use first. The bearings are much harder than the conduit steel and much much harder than the zinc galvanizing. It should have no effect on the tolerances, it is just cosmetic.June 21, 2018 at 7:39 pm #62047
Here’s a video of the noise, sounds like an old wooden ship creakingJune 21, 2018 at 7:42 pm #62048
I don’t remember this noise on the father in laws build
The foot is almost done if there’s no issue with the print then I’ll live with the noise for nowJune 21, 2018 at 7:43 pm #62049
Yup, the “old man” is back. Some conduit is way worse than others. Total standard sounds right there. I spend a solid year sitting next to two creaky old men printing parts in a garage 7 days a week. Slap a router on there…no sounds to worry about.June 22, 2018 at 4:15 am #62053
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