How hot can enclosure get?  

Re: How hot can enclosure get?

Dont worry. I have some burn mark from stepper motor even without enclousure. Any electronic dont like temperature more then 85°C, but remember that power elect. generate heat itself.
60deg is ok. I have the same with standard MK3 in box (no elect. or psu out).

Re: How hot can enclosure get?

I modified the Lack Table enclosure by the addition of silicon sealing strips and foam insulating tiles over the acrylic 'Windows'.

STORMGUARD 05SR630006MCL Silicone SELF-ADHESHIVE HIGH PROFORMANCE Draught EXCLUDER Seal 6M Transparent https://www.amazon.co.uk/dp/B00MZFH9A2/ref=cm_sw_r_cp_apa_OI18Bb9ENPHTR

Thermopanel 10mm Tile Backer Board https://www.amazon.co.uk/dp/B00P2P603Y/ref=cm_sw_r_cp_apa_HX18BbFNXGKES

On my first print with ABS (with a bed Temperature of 110°C) I saw enclosure temperatures between 55°C and 60°C and after a couple of hours the print was interrupted with the message:
" TMC Driver Overtemp".

Prusa support told me the reason is an overheating Einsy board, but I'm surprised that the critical temperature is as low as 60°C. If so, this is a significant impediment for those seeking to print Nylon or Polycarbonate, I'd guess.

I'd love to hear if anyone else is getting away with higher enclosure temperatures without a relocated Einsy board.

I might consider relocating the Einsy, but I imagine that's a real pain, with all the extra wiring that'd be needed.

Can we convince Prusa to produce a wiring harness for a remotely located Einsy?

Re: How hot can enclosure get?

Dont worry. I have some burn mark from stepper motor even without enclousure. Any electronic dont like temperature more then 85°C, but remember that power elect. generate heat itself.
60deg is ok. I have the same with standard MK3 in box (no elect. or psu out).

Is your printer still running fine? I'd rather not remove the PSU since I'd like to be able to move my printer without the enclosure from time to time. I'm planning on leaving the doors open unless I'm printing ABS/PC/Nylon/etc. I've done a heat test and peaked at 50C.

Sorrry for necroing the thread, but I don't have enough posts to PM.

Re: How hot can enclosure get?

If you print most of the time ABS, I would also bring the Einsy board outside. 55C reduce the live of electronics a lot. All capacitors will dislike this hot ambient. Otherwise you will might need to replace the board after one or two years of heavy usage.

Re: How hot can enclosure get?

Is your printer still running fine? I'd rather not remove the PSU since I'd like to be able to move my printer without the enclosure from time to time. I'm planning on leaving the doors open unless I'm printing ABS/PC/Nylon/etc. I've done a heat test and peaked at 50C.

I'm printing ABS from time to time on my MK2.5 and PSU died after 1.5 years of usage because of capacitor failure. So if you print ABS/PC/Nylon most of the time, then placing PSU outside is a must. Otherwise it will die latest after one year (one day after warranty expires 😉 ).

Re: How hot can enclosure get?

Is your printer still running fine? I'd rather not remove the PSU since I'd like to be able to move my printer without the enclosure from time to time. I'm planning on leaving the doors open unless I'm printing ABS/PC/Nylon/etc. I've done a heat test and peaked at 50C.

I'm printing ABS from time to time on my MK2.5 and PSU died after 1.5 years of usage because of capacitor failure. So if you print ABS/PC/Nylon most of the time, then placing PSU outside is a must. Otherwise it will die latest after one year (one day after warranty expires 😉 ).

Thanks for the heads up, I'm only planning on occationally printing high temp materials so I think I'll take the risk.

Re: How hot can enclosure get?

From most reports I've seen, 30C is basically sufficient ambient temperature for most of the higher temperature materials doable on a stock hotend that have issues with layer adhesion. I'd add a vent to keep it under 50C, at least, or maybe just remove one panel of insulation.

Also I hope your power supply is outside of the enclosure with those temps or you may have only a couple hundred usable hours left on those capacitors - electrolytics will gradually cook off their electrolyte in high temperatures and will fail, the power supply modules has several of these and generates a good bit of heat on its own, so they will cook quickly even when 105C rated (since it's like 105C rated for 5000 hours or something). The aluminum caps with a polymer electrolytic on the einsy rambo board are somewhat more heat tolerant as their electrolyte isn't a liquid, but they are subject to similar thermal stresses. If you are seeing overtemp errors reported by your drivers, the ambient temperature is definitely starting to reduce the lifetime of your electronics.

The critical thing here is that the temperature you're measuring is the AMBIENT temperature, not the temperature on (or in) the part itself. That means if the part is generating heat (and most electronics generate at least a little), then the heat has to get through the thermal insulation of the case they're packaged in and then dissipate to the ambient. With the normal thermal conductivity of a part, this could easily mean the core of the component is 20-30C over ambient temperatures even when it wouldn't be that warm to the touch under normal room temperature conditions.