Going To Fix Printer, Need Advice
Hi All,
So my replacement Mk3s just came back from Prusa after a so called repair. TBH I cant see that anything was achieved. My printer is still noisy in Stealth mode and even worse in Normal mode but apparently according to Prusa that's how it's meant to sound.
Funny how the first Mk3s that I had to send back due to an overheating issue was wispier quiet in Stealth Mode but oh well.
So it looks like I'm going to have to go it alone to fix the problems.
The majority of the noise is coming from the Y axis motor. The X axis motor is bad as well but not as bad as the Y axis. I'm also getting a vibrating and grinding noise coming from the bed's bearings.
I'm looking at replacing all the bearings on the Y, X and Z axis. Can anybody recommend any replacements?
Also looking to swap out the Y and X axis motors. Are there any non Prusa ones that are quiet and can be used?
Any help would be great.
RE: Going To Fix Printer, Need Advice
Don't just throw parts at it.
Start by greasing the bearings (pack them), and make sure they slide easily on each axis. Adjust the bearing bindings if they are too tight.
After the bearings are greased and loose enough - then look at noise sources.
RE: Going To Fix Printer, Need Advice
Hi All,
So my replacement Mk3s just came back from Prusa after a so called repair. TBH I cant see that anything was achieved. My printer is still noisy in Stealth mode and even worse in Normal mode but apparently according to Prusa that's how it's meant to sound.
Funny how the first Mk3s that I had to send back due to an overheating issue was wispier quiet in Stealth Mode but oh well.
So it looks like I'm going to have to go it alone to fix the problems.
The majority of the noise is coming from the Y axis motor. The X axis motor is bad as well but not as bad as the Y axis. I'm also getting a vibrating and grinding noise coming from the bed's bearings.
I'm looking at replacing all the bearings on the Y, X and Z axis. Can anybody recommend any replacements?
Also looking to swap out the Y and X axis motors. Are there any non Prusa ones that are quiet and can be used?
Any help would be great.
The thing that helped my Y-axis noise the most was to tighten the bolts holding the LCD case to the frame. I put mine together as a kit and when I mounted the case, I tightened the bolts what I thought was good and tight. Turns out, it wasn't even close. At certain Y axis speeds it would make an awful noise do to the resonant frequency. In reading various posts here, I had seen several people comment on the LCD case making noise. I tightened the mounting bolts probably another two full turns and the printer is so much quieter,
RE: Going To Fix Printer, Need Advice
- Grease the bearings. Squish as many grease in it as posible, press it with one side of bearing closed by finger and other side the rod as a piston in it. Do it over and over.
- Print one of the thingiverse files that replace the fuck*ng u bolts with bearing holders.
- Rotate tge rods 45 ° to avoid the bearings are driving the old places again
RE: Going To Fix Printer, Need Advice
I have smooth rod failures as well and replacement parts from prusa. From what I gather you should first throughly clean the rods, bearings to make sure they are free of any old grease/oils and then immediately relubricate after cleaning/drying the parts (don't use acetone on the bearings that will ruin the wiper seals and plastics). From the documentation it seems like it is their practice to not pack grease into the bearings and this is a bad plan it seems as I have two new prusa assembled printers that have nice big grooves gouged into the smooth rods after just a week of printing.
If you hear any crunchy noises or can see/feel rough spots on the smooth rod the bearing its ruined so it will need replacement. Running a bad bearing will just keep ruining more parts of the smooth shaft if you can see/feel any gouges in the shaft the shaft itself will need replacement as well.