Should I return this printer?
I have the Core One L about a week now. I did print some ASA objects but I get more and more problems:
1
When the Y-axis moves I hear some rattling that seems to get worse each day.
2
When starting a print it does some homing. The printer head bounces alternating into the X and Y end-stops.
The number of time it does this gets more and more. I think about 20 times is no exception. Some times it gives a failure and it starts over.
3
For nozzle cleaning the nozzle is touching the build plate to clean it. But the number of times it does this is also getting more and more.
The last time I started a print it did do this 32 times and then gave a failure. I pressed ignore and the print is started.
I do not dare to use the retry because some other thread in this forum is about a problem where the nozzle in this case scratches the build plate.
4
When it does bed leveling some times the nozzle probes the bed a few times per point. And also this amount is getting larger. I had some points sampled 10 times!
So the problems are getting worse and worse. What should I do? Return this printer?
RE:
I have the Core One L about a week now. I did print some ASA objects but I get more and more problems:
1
When the Y-axis moves I hear some rattling that seems to get worse each day.
2
When starting a print it does some homing. The printer head bounces alternating into the X and Y end-stops.
The number of time it does this gets more and more. I think about 20 times is no exception. Some times it gives a failure and it starts over.
3
For nozzle cleaning the nozzle is touching the build plate to clean it. But the number of times it does this is also getting more and more.
The last time I started a print it did do this 32 times and then gave a failure. I pressed ignore and the print is started.
I do not dare to use the retry because some other thread in this forum is about a problem where the nozzle in this case scratches the build plate.
4
When it does bed leveling some times the nozzle probes the bed a few times per point. And also this amount is getting larger. I had some points sampled 10 times!So the problems are getting worse and worse. What should I do? Return this printer?
I'll give you keywords to search the forum for a quick answer. Hopefully someone else has more time to chime in:
- most likely what you hear are electronic artifacts, not the actual bearings (no rule without exception, "... or your bearings are busted". But it's unlikely. They'll last for hundreds of kilometers, usually). Just ignore the noise, check out "stealth mode" or experiment with print speed to avoid the critical frequencies.
- homing: Your gantry is not square and / or belts are tightened unevenly. Please read up on the topic, it's crucial to operating a Core One.
- Nozzle cleaning: Possibly an electrical glitch (you can disable the heater that interferes in software, read up on the forum). Possibly debris or dripping filament. Check that your nozzle is tight (the thumb screws). It takes a bit more torque than may be intuitive. Also (!!) check that cables to the hotend do not cause direct mechanical force on the heater element - run them in a small loop or the like, not a straight line under tension - as this confuses the sensor.
Regarding your final question, you decide. Those are all known problems with known solutions, and support will help you with a genuine hardware defect.
Should you bother with it? You decide. One option is to figure it out once now, then you can still fix it a decade down the road, when today's hyper-modern competitors are long recycled and forgotten. Not saying I would buy another Prusa printer myself (OK, no one asked...) but I got one and understand its quirks and it prints reliably - if noisily.
RE: Should I return this printer?
My only experience with CoreXY printers is the Core One. I did spend a Saturday afternoon with an H2D. Curious though is lack of a squared gantry that is causing homing issues common to CoreXY setups or is this just a Prusa thing?
The best place for help with a new printer - or a new-built kit, is Prusa Support via chat (bottom right of most main Prusa website pages), you will need the serial number from the back of the printer.
- the machines are tested and leave the factory in good order but Prusa have no direct control over couriers and baggage handlers so sometimes they are subject to rough treatment during delivery; support will help you get it going properly or even arrange return/repair if needed but also they can sometimes trace poor handling hotspots and troubleshoot delivery with the shipping companies...
Cheerio,
RE: Should I return this printer?
- the machines are tested and leave the factory in good order but Prusa have no direct control over couriers and baggage handlers so sometimes they are subject to rough treatment during delivery; support will help you get it going properly or even arrange return/repair if needed but also they can sometimes trace poor handling hotspots and troubleshoot delivery with the shipping companies...
I no longer buy this. Other companies manage to pack their printers such that they can be safely shipped. For Prusa, we have seen so many reports on Core Ones which arrived in undamaged boxes, but with the printer frame bent and the panels smashed. And besides, how would shipping cause a load cell to work unreliably? That's a design or manufacturing flaw.
Unpack and Print!
5 minutes from unpacking to first printUnpack the printer, click the display in place, and plug it in. That’s it. No self-tests, calibrations, or tinkering. The machine manages everything on its own, including setting up the best print environment inside the chamber. Simply download something cool from Printables.com, process it with EasyPrint, and see it being printed instantly.
That's Prusa's sales pitch for the Core One L, straight from the online catalog page. They know that the market is shifting away from the tinkerers and they need to deliver reliable, easy-to-use printers. They just can't deliver on the promise.
To the OP: Yes, I would return the printer right now.
we have seen so many reports on Core Ones which arrived in undamaged boxes, but with the printer frame bent and the panels smashed.
We have seen perhaps two or three a month - Prusa are shipping over 10,000 printers a month - that's a tiny proportion arriving damaged.
Do other printer manufacturers somehow have 0% transit damage?
And besides, how would shipping cause a load cell to work unreliably? That's a design or manufacturing flaw.
- or violent handling shaking a connection loose.
Cheerio,
RE: Should I return this printer?
First thing I would do is contact our support via Livechat. At the first glance the rattling and homing might be fixed by calibrating belts and checking if there is no obstacle blocking the axis. And nozzle problems might be caused by the material (ASA might be tricky and if the nozzle is dirty from it, it can cause some problems).
But our support will help you with your issues as much as they can.