SoliForum - 3D Printing Community — My S2 Case ;)

Re: My S2 Case ;)

null@example.com (protorix) — Mon, 05 Aug 2013 07:39:35 +0000

eThanks!
I´m still working at the casing.
I added some fans and a fan control and started to build the under cabinet.
I also added a wireless cam inside, to see what the machine is doing without standig up from the chair

Re: My S2 Case ;)

null@example.com (nlancaster) — Sat, 27 Jul 2013 23:15:42 +0000

Dude that is awesome. I wish I had thought of mounting the printer on drawer slides to get it in and out of the enclosure to work on it!

Re: My S2 Case ;)

null@example.com (protorix) — Sat, 27 Jul 2013 19:34:00 +0000

Thanks for that information, anyway I wanted to fit some fans into the case. I only have the stock PU, but I think 3 or 4 fans should not be a problem with the stock PU, do you think?

Until now I have no problems with the spool hold.
I added some pics of the spool hold. Important is the plastic thing that prevents the filament from falling from the spool, and something that holds the filament in direction. I have done a lot of printing with that without problems.

Re: My S2 Case ;)

null@example.com (adrian) — Sat, 27 Jul 2013 14:30:54 +0000

Nice case.. will be keen to hear how you go with the horizontal spool - I know a lot of people had nothing but hassles with filament in that orientation so hence the SD3's came with the 'vertically' orientated spool...

IanJohnson wrote:

It looks cool, but you could potentially have trouble from the electronics being enclosed with the print area. It would be a good idea to add a vent and a fan over that area.

Indeed. At 60°C ambient, which is not unheard of in an enclosure, the Sanguinololu's MOSFETs will derate to the point their Max Current capability is a measly 4.6amps - Just enough for the underpowered 'stock' heated bed but not enough for a QU-BD or custom heatbed.... sure they'll do more still, briefly, but only at the cost of raising the junction temp above their 175°C max temp and letting the magic smoke escape. And even with the stock heatbed - thats the claimed max values according to the datasheet - its not whats recommended for healthy long term operation

So yes, active cooling/venting is needed on those MOSFETs (let alone the Stepper Drivers! I would hate to do the derating calculations on them, suffice to say, it'll be under 20% rating of their already overly optimistic rating at an ambient of that temp... and the temp of the MOSFETs becomes irrelevant if you can't print without missing steps ). Heatsinks alone wont do it, since they only will conduct to ambient, which is still too high. You will need active cooling to ensure prolonged MOSFET life...

Its the sting in the tail in MOSFETs.. they rate them based on a 25°C ambient, and they derate something shocking (compounded by the fact their RDS(on) value can become 2x their 25°C rating, further generating heat and lowering the overall ability for the MOSFET to dissipate power... )

Re: My S2 Case ;)

null@example.com (IanJohnson) — Sat, 27 Jul 2013 13:55:42 +0000

It looks cool, but you could potentially have trouble from the electronics being enclosed with the print area. It would be a good idea to add a vent and a fan over that area.

My S2 Case ;)

null@example.com (protorix) — Sat, 27 Jul 2013 13:01:13 +0000

So I finished my SD2 casing today, still some things to do, but let´s say quite finished.
The main case is made out of 30mm aluminium cubic tubes with plastic connectors.
Originaly built in 2004 as a PC case I made 2 of those back in 2004, the other case will get wheels and will be put under the printer.

The printer can be rolled out by a ball bearing move out.
The fillament sits on top of the printer with some self made "headset" (like on a bike)