Weird extruded heating problem  

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palatinusmagnus
(@palatinusmagnus)
New Member
Good evening,
   I am Yelizar Dergachev and I bought one  outstanding Prusa MK3s recently. However, I am having a problem with the hotbed not heating up. The top 5 amp fuse regularity burns out. I am not sure why this is happening. I do print at high ABS temperatures in a thick thermal enclosure, but I am not sure if that is the root cause. I have been trying new extruders and fuses but nothing works. Could anyone help? It’s been 3 weeks of pain since it broke and I am completely out of ideas. Thank you for your time,
Sincerely,
Yelizar Dergachev
 
The wires are intact. All modules are attached. None of the wires seem damaged.
Posted : 21/07/2019 5:00 am
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 -2
(@-2)
Illustrious Member

What is the peak/max temp inside the enclosure as the printer is running?

This post was modified 1 year ago by --
It is always wise to get more than one opinion... as for trusting Prusa? No way man....
Posted : 21/07/2019 5:13 am
palatinusmagnus
(@palatinusmagnus)
New Member

It’s a block of “eva “ foam tiles on all sides. Thick stuff for shop floors so that the ABS doesn’t warp. The bed is at 100c, nozzle 255c. Could that have damaged something?

On the main board I didn’t see any anomalies, but I don’t know about the PSU.

Posted : 21/07/2019 6:47 pm
--
 -2
(@-2)
Illustrious Member

Okay - since you do not know how hot it is getting inside your enclosure (or won't admit to how hot it is getting) ... your issue is probably ambient temperature related.  Cool down the printer and things should work better.

It is always wise to get more than one opinion... as for trusting Prusa? No way man....
Posted : 21/07/2019 6:51 pm
palatinusmagnus
(@palatinusmagnus)
New Member

Well, I really don’t know the temperature as I do not have ambient monitoring equipment. I wish I could run it at lower temperatures, but the printer’s extruded won’t heat up at all. What could affect the extruded that is ambient temperature related?

Posted : 22/07/2019 5:35 am
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