Hello,
Need help repairing my M300 Dual.
I did an axes maintenance, as suggested by Zortrax Support (I was getting messages when doing an axes test). After following the step by step instructions I ran the axes test. It seem to be going well but about half way through the test the rails made loud rattling noises. Then the hotend head moved to the left forward corner, made rattling noises then the printer started beeping, red LEDs flashing, so I turned off the printer. At this point I was not sure what to do but I did move the hotend head to the middle of the printer. I wanted to see if I could feel any unusual resistance. I then noticed that the rear bearing sleeve had slipped out of its housing. See image.
Anyone experienced this before? Can anyone offer instructions on how to fix this, or what to be careful with while attempting to fix this? I could go in blind and figure it out myself but I’m concerned of making things worse.
Support has suggested for service (Zortrax) to repair this. Unfortunately I purchased this printer used (no warranty) and did not come with the original shipping box. I would think cost of shipping to Zortrax will be costly.
Hey, I had a similar issue and managed to fix it this way:
Thoroughly clean all the rails with IPA alcohol to remove any old grease.
Adjust the system’s parallel alignment using the JINGS method: Zortrax Axes Maintenance Guide. Additionally, I measured the dimensions with a caliper. The GT2 belt pitch is around 0.8 mm, so if there are significant differences, adjust the belt by one tooth to achieve a dimension tolerance of ±0.1 mm.
Then, I adjusted the axes as described for the older M300 model, starting from step 7 in this guide: Zortrax M300 Axes Maintenance.
It’s crucial to properly position the XY plane as shown in the guide and adjust the other axes accordingly.
Lubricate the rails with a high-temperature-resistant liquid grease (up to 120°C).
I did clean the rails with IPA then greased the rails (using the grease that came with the printers) prior to performing the axes test, then axes maintenance. I do have a M300 Classic printer. Could use it as a guide when fixing the M300 Dual.
I’ll follow your instructions this weekend and post here on how it all went.
I’m trying to see how to place the sleeve bearing back into the rod housing, circled in red on image, and retain it. I was told there are screws that will retain it. Though I can’t see where these screws are if not the ones that can be seen. Are the any assembly drawings, or assembly instructions, showing how the bearing is assembled into the housing? I’m not keen on taking the whole of the rod assembly apart if pushing the bearing back into place and tightening screws is all that is required.
Sorry, I just realised that you did not address the bearing sleeve which had come out housing and how to fix this. See the images I included in the post.
It looks like I have to take the whole x-y rail system apart. Zortax is reluctant to supply me with an assembly drawing or assembly instructions ( instructions used on the assembly line). I don’t need the full document, just the area that describes the bearing sleeve and how it’s assembled into its housing.
I guess I’ll have to go in blind.
If all else fails, I’ll sell it on eBay for parts, then buy a Bambu printer.
Insert the bearings into the housing so that the bearing’s front surface is flush with the bearing housing. It’s important that the points marked “C” in the picture are unscrewed; otherwise, the bearing won’t fit.
After inserting the bearing, tighten the screws gently.
Follow the procedure I mentioned earlier.
Regarding Bambu, it has its own drawbacks, and if you print a lot of ABS, you might experience issues like the print bed lifting due to weak magnets. I use both these printers and Zortrax, and I can tell you that Bambu is great for small prints. For large, heavy ABS/PC prints, I use Zortrax.
I managed to fix the bearing sleeve. It took me a while due to not being familiar with how this printer is built. Unfortunately it’s still failing axes test, though the vibration during the test is not as bad.
Nevertheless I don’t have time to mess with it and I can’t afford to ship it back to Zortrax to have them fix it.
Instead I’m selling it off and hopefully I’ll get some of the money I paid for it. I got it cheap and it was an addition to what I already have, a M300 Classic (it’s slow but very reliable and produces great prints) and two M200 Plus. I’ll use the money towards a Bambu PS1.