Never even thought about separate chamber heater. Have been hoping that heater bed plus insulated enclosure would avoid need for separate chamber heat?
Fan to exhaust fumes/heat is a nice idea, adding my list. Cheers!
I think I mentioned it further up in this thread, but I have an exhaust fan on my current enclosed printer. It works really well to keep the temps down for PLA and it helps to cool the heated bed faster when the print is done.
The current printer has a gap around the door where the exhaust fan pulls air from. The air gets pulled directly across the heated bed.
I might end up putting 2 fans on this build for exhaust. The chamber is larger.
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I did the same thing! Glad it wasnt just me! LOL
My son’s soccer practice got canceled, so instead of mowing the lawn like I should, I worked on the printer.
I got one side plate installed. I got the other side plate and back cut out.
I extended the last servo and endstop. Then I tried my hand at cable lacing.
For those not following other threads, it was discovered that you can fit a roll of filament inside the printer, so I designed and printed a reverse boden mount to go in the back corner of the printer.
Here’s the part on thingiverse
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Mental note… When extending wires, make them stupid long.
I extended the parts fan wires to what I thought was more than adequate. By the time I finished cleaning up the wire bundle, they’re about 3" too short 
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Every time I break out the DuPont crimper that works 90% and still needs some persuasion with pliers to make it work. I think I rather just get a USB soldering iron, so I can just cut to length somewhere in the middle. Some sort of tiny terminal block might be okay but the right length wires look so good.
As much as I love the plugs on the boards, I rather have some sort of screw or push terminal. Then we could very easily run wires. Like on the stepper side and the board side. I love clean wiring, and this is very annoying to me.
- I wonder if we could come up with some sort of dupont to manual terminal…
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The fan doesn’t use dupont connectors on the SKR. But I am using the little terminal crimps on the ends of the wires. I can easily solder on a few more inches to the existing wires. It’ll be hidden inside the enclosure.
I need to extend the x-axis endstop too. It reached prior to wrapping the wires, but it was more of a stretch than I thought it was.
I cable laced the wires going to the extruder to try it out. It looks pretty good, but I think I’m still going to slide a wire sleeve over the entire length. I’m not a fan of seeing all the different colored wires.
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This is my plan for hanging the spool inside the enclosure. I’ll run the bolt through the side panel. I’ll use fender washers to spread the load and a locknut to keep the bolt on the wall. Then the spool will be between two regular washers and a wing nut loosely used to keep it on. If the wing nut doesn’t work, I have a second locknut I’ll 3d print a large gear to use to turn by hand.
Looking at mine I am concerned about the bolt sticking out too far and impacting the bed. Thinking about literally putting one of the bearing ones on the bottom plate and seeing what happens.
Yeah. So… about that.
The bolt I bought was too long and the bed would hit it. But, I bought a really long bolt. So I chopped some off.
Problem is. I chopped too much off.
I had to remove the lock nut that was up against the side wall. So it goes, bolt, fender washer, side plate, fender wash, regular washer, filmanent holder, lock nut.
It looks like it will still work. I can get another long bolt and this time only cut off enough to clear the plate. I have nearly another half inch between the end of the bolt and the bed now.
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It’s alive! Best first print I’ve ever had.
Completely untuned in s3d. I took my existing printer profile and just changed the startup commands to do the bed leveling.
The calipers show the dimensions are just about perfect. I did not test for squareness.
I have a video uploading to youtube complete with a bed drop at the end when the steppers shut off.
Here’s the first print pictures. I’m really excited to get the printer finished now, calibrate it, and get appropriate speeds configured in my slicer.
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Full video of first print.
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That looks great. You made good time on it too.
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Congrats David! Great to see these machines moving.
Appreciate the video and all the info you’ve been sharing. Baby chicks?
What are these things? Mosfet relays for fans or something else low current?
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Exactly. One is for the exhaust fan. The other is for the chamber heater.
Both will be controlled by my octoprint plugin.
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Yikes! I am pretty sure you just have not gotten to it yet with the excitement of a first print, I use an ending gcode of G0 Z195 F3000. That parks my bed at the bottom. My little bed does not thunk like that, big bed, big thunk.
Whoa! On a first print. That is awesome.
Pretty interested in your long term opinion. I am very happy with it but I also kinda have blinders on, it works way better than anything I have ever used before so I see no major flaws yet. So far just change the belt holding (I till want to do that with no hardware). I am all set to mess with klipper when I have a bit of time, and who knows what I will see at RMRRF. I also have a super light BTT H2, but I am easily maxing out my flowrate so I might also try a higher flow CNC Kitchen Hack.
Yup. Completely forgot to put the ending gcode in. I added it this morning. Sadly, if you cancel a print in Octoprint, it still thunks. I need to see if there’s a setting in octoprint to NOT turn off the steppers when you cancel a print.
So far my only complaint is the parts cooling fan. I have a few more of those fans that I found in a drawer. I’ll try replacing it to see if it’s just the bearings on this particular fan.
That was the loud one I was hearing? Mine are quiet but thay also don’t move enough air, I might need two if I speed up at all.
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Yup. That was the loud one. And I only run it at 60%
I might try oiling this one first.
I’m running a 5 hour print later today.
I like the video!
And it looks solid! What was the hardest part of your build?