Enclosure for Orion

[lasermike]

I finally finished my enclosure design for the Orion printer. it is very simple, clean and all can be printed on the Orion.




https://www.hightail.com/download/UlRTT ... bVVLSk5Vag

above is a link to the .stl files i created for this. will also get them posted on Thingaverse.

Plexiglas was purchased from Lowes, cut list is also attached for the sizes needed.

[youtube] http://youtu.be/Nq1Yx56N1iU[/youtube]

[BenTheRighteous]

Looks great! Did you have to drill new holes in the Orion to fasten the brackets to?

[RocketMagnet]

That's really cool and like the fact you've used as many printed parts as possible. Especially like he flip up latch that's very neat.

Looks like it uses the original base screws at the bottom and in the video it looks like bolts at the top so must be drilled through?

[lasermike]

the only holes drilled were on the top. the bottom are aligned with existing screws. going to add a thermometer and see what internal temps i am getting, then possibly add a light bulb to add some heat if needed.

[Eaglezsoar]

Thanks for posting the files, they look great!
Excellent work!

[lasermike]

put in a thermometer, it is holding at 90-91 degrees inside the enclosure for a 2 hour print. bed temp set at 80 and extruder set at 230. great results with my abs prints

[RocketMagnet]

would personally be interested to know how the enclosure affected the PID tune of your printer?
Presumably you've already done a retune but was wondering if by chance you recorded before and after values for P I and D, I'd guess quite a big difference
for your Nozzle if it's 90 Deg C in there considering it was probably calibrated at 200 Deg C and ~25 Deg C ambient.

I was also wondering if the enclosure also helped with temp control so if you use repetier host a screen grab of the heat and control of both nozzle and bed temp profile
to see how well it's controlling would be really interesting to see?

Seriously considering an enclosure when I get the time and I like your design... my main concerns are temp control and the cooling fans aren't rated up to those temps IIRC
I think ~70 is their max? so I'm considering a temp controlled exhaust fan to hold it at what I want in there but if yours is fine I may not bother...

[mvansomeren]

I would like to build something like this for the Max V2. My one concern is cooling of the PSU. There are vents in the bottom plate that would then be inside the enclosure.

I wonder how easily the brackets you designed could be modified to fit the Max V2?

[BenTheRighteous]

I assume lasermike was quoting his temperature in deg F. I have an enclosure for my Max and when I open the door and stick my hand in, it is nowhere near the temperature of boiling water. Having said that, the amount of heat that IS retained IS very helpful and part warping has pretty much become a thing of the past for me. (Along with other helpful mods like the PEI build surface.)

I didn't bother with retuning either of my PIDs using the logic that when the first turn on, the enclosure is cold anyway and the effective PID values would be unchanged. Once things do heat up, the controller does a fine job of holding temperature despite the change in ambient.

JFettig did a superb job of designing a Max enclosure you can find here... http://forum.seemecnc.com/viewtopic.php?f=42&t=7149

Yes it's true that the PSU has vents that lead into the chamber, but A.) the chamber is not airtight so some air will still flow anyway and B.) there are vents in the bottom of the printer as well, so I haven't bothered with redirecting airflow. I plan on printing new side panels with cooling fan mounts someday, but that is not a priority. Things work fine for now.

Bottom line after enclosure...
High-temp fans: didn't bother
PID retune: didn't bother
PSU cooling vents: didn't bother
Number of ruined components: zero
Overall enclosure rating: totally awesome, two thumbs up

[RocketMagnet]

I'd not considered Deg F as in the UK the only time it's ever used is when the Media are trying to sensationalise a hot day...
But yes 90 Deg C sounds a bit hot for the air space but I just shrugged and thought it must be building up this high in the very top of the unit.

No sticking your hand into an air space heated to 90 Deg C is not the same as sticking it into water at the same temp as the heat transfer
is very poor from air. Hence why you can put stuff into your oven preheated to 240 Deg C with your hands...

I've personally not had issues with warping too much but an enclosure has the added benefit of me being able to vent off the ABS fumes
and allow the windows open etc. I've already added cooling fans to the base so that's already covered.

I thought with an enclosure you would preheat the build volume to temp first then start the print to maximise the benefits of the enclosure
as your not just after an increased temp you want a stable one also IMO...

Reason I was asking about the PID tune is I'm personally seeing a difference with a cold vs warm room. I also thought the PID tune was control
at temp not just getting it there.. so if the ambient is different (higher) I was reasoning it may be overshooting a tad... or take a bit longer to stabilise than needs be.
As the enclosure increases the temp it's not something you would notice.. cooler and it's obvious as it can't actually attain target temp...

Sorry I wasn't meaning to sound critical though looking back I can see how it looks like I am... I'm genuinely thinking things through, I rarely if ever just
accept something does something I always want to understand why...

[Jimustanguitar]

I would like to build something like this for the Max V2. My one concern is cooling of the PSU.

Use my vented side covers. http://forum.seemecnc.com/viewtopic.php ... 697#p62322

[img]https://fbcdn-sphotos-c-a.akamaihd.net/ ... 2531840898[/img]

[BenTheRighteous]

No sticking your hand into an air space heated to 90 Deg C is not the same as sticking it into water at the same temp as the heat transfer
is very poor from air. Hence why you can put stuff into your oven preheated to 240 Deg C with your hands...

[...]

Reason I was asking about the PID tune is I'm personally seeing a difference with a cold vs warm room. I also thought the PID tune was control
at temp not just getting it there.. so if the ambient is different (higher) I was reasoning it may be overshooting a tad... or take a bit longer to stabilise than needs be.
As the enclosure increases the temp it's not something you would notice.. cooler and it's obvious as it can't actually attain target temp...

Sorry I wasn't meaning to sound critical though looking back I can see how it looks like I am... I'm genuinely thinking things through, I rarely if ever just
accept something does something I always want to understand why...

You're right on all counts. I still think it's 90 deg F and not C, maybe my logic is a little faulty, but still...

You're right that PID has two functions: A.) get to the target temp, and B.) keep the target temp. It is my (personal!) opinion that the more significant of those two is (A) getting to temp quickly and accurately, and so in theory the PID values would be the same for the 'no enclosure' vs. 'cold enclosure' cases. Once the enclosure warms up, we would definitely be far past the (A) stage and only worried about (B) at that point and the 'I' and 'D' pieces of the PID equation can compensate for changes in ambient temperature which translates to change in heat loss. So that's why I didn't bother to retune - I didn't feel it was necessary - but if you disagree with me (which is fine!), retuning certainly won't hurt anything!

Don't apologize for sounding critical (which you didn't, btw), I'm the exact same way. I'd rather ask a question and get an answer, or state my understanding of something and be wrong and get corrected or have a debate, rather than silently persist an incorrect belief. We're all in the same boat, which is to learn and print cool stuff...!

[mvansomeren]

Thanks Jim and Ben - great input! It helped me make up my mind for the V2.