QU-BD Silicone Heater

General discussion of 3D printers

QU-BD Silicone Heater

Postby bdring » Tue Dec 11, 2012 9:56 pm

http://store.qu-bd.com/category.php?id_category=19

http://blog.makezine.com/2012/12/11/too ... er-review/

qu-bd-pad-02.jpg


They have several sizes and they all draw quite a bit of current.

My first thought is it is not flat? They should test one on a printer or show one in action.
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Re: QU-BD Silicone Heater

Postby BenJackson » Wed Dec 12, 2012 6:56 pm

The MendelMax kits were shipping with something like that, plus some wool insulation and a laser cut wooden retaining frame to press it all against the aluminum build plate.
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Re: QU-BD Silicone Heater

Postby loopingz » Fri Dec 14, 2012 10:18 pm

People build heat blanket for curing skis with the same technique albeit bigger.
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Re: QU-BD Silicone Heater

Postby nismobg » Tue Jan 15, 2013 5:18 am

I just tried the 200x200 i have 300x 300 too , it took me exactly 11 min to reach 110C, I would guess my ramps 1.4 is the reason for not heating fast , I am not sure it can provide the amps needs to speed it it. Any solution on it ?


PS the MK2 heat bead takes 15 min to reach 110c on the same config
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Re: QU-BD Silicone Heater

Postby SystemsGuy » Tue Jan 15, 2013 8:22 am

I doubt it's your RAMPS - check your power supply - the 300x300 I had came in at about 24 amps despite them saying it would draw 20 - suspect that's just variability in manufacturing.

They are not - or at least as I understood it - designed to be printed on directly, but to be placed under the surface you are printing on. I use 3mm borosilicate glass as a print surface. My "HPB Sandwich" with the Silicon pad was an aluminum base, 5mm AeroGel insulation, silicon heat pad, boro glass. I was never super happy with it as I had to fiddle about quite a bit to get and keep the glass level. I was going to mill some aluminum squares to support the edges of the glass, but never got around to it...

I think mine was reaching 110c at the print surface in about 5 minutes with a 32 amp, 12volt supply.

nismobg wrote:I just tried the 200x200 i have 300x 300 too , it took me exactly 11 min to reach 110C, I would guess my ramps 1.4 is the reason for not heating fast , I am not sure it can provide the amps needs to speed it it. Any solution on it ?


PS the MK2 heat bead takes 15 min to reach 110c on the same config
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Re: QU-BD Silicone Heater

Postby nismobg » Tue Jan 15, 2013 8:59 am

Well I use 62A 750W PSU and my temp gets to 110 in 11 min. Not to mention i have 4mm tempered glass on top and insulation on bottom.
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Re: QU-BD Silicone Heater

Postby SystemsGuy » Tue Jan 15, 2013 11:04 am

That's odd - I wonder if the supply simply isn't putting out the 60 amps on the 12 volt rail? I've seen dodgy numbers from PC power supplies before, but unless you have a pretty beefy ampmeter, it's hard to measure over 20 or so...

I sort of doubt it's the RAMPS board, as all it does is switch the MOSFET on to supply power to the bed - and if it wasn't switching the MOSFET fully on, at 20 amps you'd smell it cooking...

Have you ever measured the resistance of the heatbed? That would at least confirm what it needs, and then you could plug the supply in to it directly bypassing the RAMPS to see if it made any difference..

nismobg wrote:Well I use 62A 750W PSU and my temp gets to 110 in 11 min. Not to mention i have 4mm tempered glass on top and insulation on bottom.
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