Onyx Temp Rating

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wheemzy
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Onyx Temp Rating

Postby wheemzy » Thu Mar 29, 2018 9:25 pm

Hello Everyone,

Does anybody know what temp you can heat the PCB Onyx Board to? I was thinking of putting some resistive wire between the bed and the glass to get to higher temp than 110.

Any thoughts?

Thanks for input!

Matt

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geneb
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Re: Onyx Temp Rating

Postby geneb » Fri Mar 30, 2018 8:12 am

If you need to go higher than 100C on your heated bed, you might be better off going to an A/C heater.

g.
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wheemzy
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Re: Onyx Temp Rating

Postby wheemzy » Fri Mar 30, 2018 4:58 pm

Hey Gene,

Will this method get me up to 150C?

Thanks,

Matt

dc42
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Re: Onyx Temp Rating

Postby dc42 » Sat Mar 31, 2018 8:28 am

wheemzy wrote:Hey Gene,

Will this method get me up to 150C?

Thanks,

Matt


Yes if you choose a suitable power density. I use a 350W 300mm diameter AC silicone heater to heat a 330mm diameter bed, which works out around 0.4W per sq cm. It reaches 150C easily (not that I normally use it that high) and I have had it up to 190C to see how high it will go. Silicone heaters are typically rated for 200C.

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geneb
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Re: Onyx Temp Rating

Postby geneb » Sat Mar 31, 2018 12:02 pm

You'll also need some kind of aluminum heat spreader that you can attach the heater to - you do not want to slap it on the back of an Onyx. That path leads to tears and failure...and probably fire. :)

What on earth do you want to print that requires a bed temp of 150C?

g.
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wheemzy
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Re: Onyx Temp Rating

Postby wheemzy » Tue Apr 10, 2018 7:06 pm

Thanks Gene. From what I've read, polycarbonate apparently likes very hot bed temps.

IMBoring25
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Re: Onyx Temp Rating

Postby IMBoring25 » Tue Apr 10, 2018 7:50 pm

I fiddled with polycarbonate a little. Even at a 150 bed in an enclosure around 35 it would only stick for a layer or two before completely peeling up. It may just not like Kapton, but that was my experience.

wheemzy
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Re: Onyx Temp Rating

Postby wheemzy » Mon May 21, 2018 10:18 pm

I finally received the aluminum heat spreader. A couple of things:

1. Is it ok to use in the melamine Rostock v2 frame? I saw in the item description not to use a wood box, I assume 2 different things....

2. Am I doing away with the onxy altogether, or am I attaching on top of the aluminum?

Thanks for any input!

Matthew


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