New printer, new to printing, cannot print, and lost  

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John Doe
(@john-doe-4)
New Member

Hello all. Yesterday, I finally finished assembling my new Mini+. Went through the manual and watched the videos and got it together after a few hours. Tonight, I finally began doing the first tests. So far, I have received 12202 and 12204 but I received some other errors that I don't know what they were (turned off quickly to avoid waking kids). I have checked connectors and looked at articles but have no idea what I am doing or how to start doing what is expected of me. I got this printer because from what I had read it seemed like this was a great printer for beginners. With all of this new vocabulary and wiring instructions, it really seems like this printer was to be one's second printer as I am completely lost.

Events thus far: The first test went fine all the way up to the loading of the filament. I hit load but it didn't go up the PTFE past the gears. I thought maybe I should've used "Next" instead of "Load" so started the process again and it didn't get past the fan testing (something about thermistor). While I let things cool down, I found out about the numbers for errors and started it up again. This time I noticed that the thermistor line bent towards the hot bed and so moved that behind the XZ arm. This time everything went well up to checking the bed temperature when I got a 12204. After some reading and wire checking, I started up again and this time got to it actually trying to print. I had the filament up into the tube as far as it would go and I wiggled it in the tube while the LCD was doing some percentage change. Then it said "Purging" and finally asked if the color was clear. Right after I said yes so that I could try reloading the filament, I got another 12204.

Did I get a bad thermomister or whatever and that's why I'm getting these 1220X errors? How can I know if that is the case? If so, is there a way I can request a new one?

Thanks for any responses. Knowledgebase is still too technical for me at this point.

Filament used is the Prusa Polymers Pearl Red PLA 1.75mm

Posted : 31/03/2021 9:35 am
misan
(@misan)
Moderator

Hi,

 

It sounds as if you have a thermistor problem.

Error 12202, as you can see here, means the printer detected no heating happened when it should.

Error 12204 is the Thermal Runaway protection: the controller detected that not enough heating was happening when it should.

Both linked documents should help you fix your problem. Both errors indicate a problem with your hotend thermistor. Whether it is a wiring problem that can be fixed or a defective or damaged one, I do not know.

This post was modified 2 months ago by misan
Posted : 10/04/2021 8:58 am
John Doe
(@john-doe-4)
New Member

Thanks for the response, Misan, and for confirming the source of the issue. I read through both the articles and the only thing I haven't done yet is take out my multimeter (if the values are correct or not, it won't fix anything). I e-mailed Prusa and linked to this posting but have not heard anything back yet. I spoke with one of my co-workers as he has a Mini as well and he mentioned that he never had any problems with his. I think I just got one of those rare ones with a problem. Reading online shows that those with problems tend to have an issue with the thermistor and the Pinda is more sensitive to issues than the Minda.

I'll try emailing them again tomorrow. Thanks again.

Posted : 12/04/2021 8:50 am
Crawlerin
(@crawlerin)
Prominent Member

@john-doe-4

Don't e-mail, use chat function instead. When you log into the store, in lower right corner you should see "Chat now" widget. If you don't see it, disable adblock or privacy protection plugins in your browser for that site and refresh.

Posted : 12/04/2021 11:20 am
misan liked
misan
(@misan)
Moderator

@john-doe-4

If you measure the thermistor using a multimeter, please make sure you move the print head around and check the measurement at different locations. Sometimes connections might be broken at certain points and be ok anywhere else.

 

Posted : 12/04/2021 11:43 am
John Doe
(@john-doe-4)
New Member

@Crawlerin

Thanks for the suggestion. I will make sure to do that at my next opportunity.

@Misan

I will definitely have to keep that in mind as I would never have even considered that! Thanks for pointing that out.

Will post back if / when I get additional status information.

Posted : 26/04/2021 11:55 am
John Doe
(@john-doe-4)
New Member

Today, I was able to make my first print. Turns out it was a bad heater on the hotend. After replacing that (and adjusting the filament sensor PTFE tension) the printer works!

@Crawlerin

Yup, the online chat is definitely the best way to contact them. The immediate assistance really sped up the process. With their help I was able to get information on how to do the troubleshooting and order the failing part. If you hadn't mentioned it, I wouldn't have even thought to look for it.

@Misen 

The heater unit on the hotend was bad. It was a connection issue and using the multimeter (considering the way you had suggested), I was able to locate the problematic line and identify the failing component. Installation was simple (but not easy) but I was able to verify that A) the new component was good and B) the new component was installed correctly with the tips you provided.

Thanks a lot for the assistance guys!

For anyone who might chance upon this thread, the printer is a good "beginner" printer. I just had to a bit more earlier than the average beginner. Good quality product and I'm glad to have purchased a Prusa.

Posted : 01/06/2021 4:19 am
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