NexGen3D: Chamber Heater V2

Revised version of my 3D Printer Chamber Heater:

With my ongoing work on my NXG-3D3 printer, I wanted to add my chamber heater system, so I thought I would clean it up and make some changes to the original.

• This one does not require any threaded inserts, all threads have been modelled in.

• I removed the grill as that ends up warping over time.

• Reduced the mounting bracket height, simplified the design so you can bolt through to the outside or the inside using hex nuts instead.

• I have added an additional hole for cabling so you can mount the heater flat without the mounting bracket, also provided a plug if you don't want to use this additional hole.

• Added an optional heat deflector shield to help redirect the air flow away from the bottom of your printer (Optional).

Bom:

• 1 x 24v 7530 Dual Ball Bearing GDStime Blower Fan

• 1 x 24v 140x32x26 200w PTC Heater Core

• 6 x M3 SHS or BHS 8mm to 20mm for the lid.

• 3 x M3 SHS or BHS 8mm if using the mounting bracket (Optional).

• 3 x M3 SHS or BHS with Nuts/washers 8mm or longer to mount the mounting bracket to the side of your printer (Optional).

You either glue the mounting bracket in place with VA glue (Super/Crazy Glue) or drill holes and bolt it in place, or you can bolt the heater directly down, this is up to you, the heat shield can be also glued in place, or stuck down with some 2 way tap.

I have this installed in my K1 Max, you will need to either install it on the righthand side, if installing on the left, you will need to remove that metal bracket hanging off the side of your bed.

For powering and controlling this thing, I will leave that up to you, myself, I now use spare 350w (LRS-350-24) power supply I had sitting around, a Zigbee smart plug, and I have it all controlled through automations in Homeassitant:

My automation monitors the chamber temperature, when it hits 62C it shuts off and then back on at 58C, really easy to do through HA Automations and the Moonraker plugin.

I have printed mine from ABS-CF and ABS-GF, I recommend ABS/ASA/PC for this, the heater never really pulls the full 200w its rated for, usually around 170w including the fan.

This heater really does the job for my K1 Max, it will hit 62C or higher without issue while the bed is running, and I can now print large PC-ABS parts with zero warping, you will also notice that the bed and nozzle temps are more stable and require less power to keep them there, but note, this additional heat will cause the camera to lockup like it does in the smaller K1C, so you will need to perform the same fix to the camera, found here: https://www.printables.com/model/904768-nexgen3d-creality-k1c-camera-fix