MAX chamber heater poor design

Sovol SV08 MAX
1

The heater itself is fine, but the darn thing draws room air in, forcing heated air out of the exhaust fan opening. What a waste! It heats the room as much as the chamber. It needs to heat the air in the cabinet, NOT the room.

I designed some printable duct work to draw the air from the bottom of the chamber (where it is coolest) and recirculate the warmed air. Used with DKEU’s heater config, it dramatically reduces the time required to reach the desired temp and dramatically reduces the amount of electricity consumed to keep it there. To say nothing of keeping the room at a reasonable temperature!

Published on Printables: https://www.printables.com/model/1728977-sv08max-cabinet-heater-ducts

2

@torch
I had a motorcycle with some exhaust ports like that! :joy: Heck of a nice job on that mod, thanks for sharing, looks great!

Cheers, :tumbler_glass:
-Mike

3

I cut some holes in the top and printed an intake duct so I could mount a Creality heater on it. Holds 60C no prob all day. Now on to cooling the print head circuit board.

4

WARNING!

The A and B gantry mounted motors are only rated 50°C ambient air temperature. Keeping your chamber @ 60° may not be wise. Your machine, your choice.

5

Thank you for that insight. I have a cooling solution for the print head but didn’t realize the motors were rated so low. Until I come up with a workaround I will have to find spare motors to keep on hand and maybe back down to 55C. I need the machine for PA-GF and ABS so heating is essential.

6

I’ve not printed PA-GF but have done considerable printing in PA-CF and 50°C is fine. I suppose it might depend on the exact PA (6 or 12). I switched from ABS to ASA before I got the chamber heater and ASA prints fine @ 50°C. Other than a very slight reduction in temperature tolerance and a higher price tag, ASA seems to outperform ABS everywhere else.

7

I will try expanding our use of ASA, if it works for the parts where I need it then that solves most of the problem. For the Nylon I can probably lower the chamber to 50 and tinker with extruder temp and print speed to get back to the same result. I appreciate the suggestion.

8

Hi

I have just seen on this thread that the a&b gantry motors are only rated to 50c but on the Sovol website they say the heated chamber goes to 60c can anyone let me know why that is

9

Sovol can’t read spec sheets? I found the maximum 50°C ambient limit by looking up the motor manufacturer’s spec sheet.

10

Hi thanks

For the information do you know of a direct replacement motor that is just plug and play and will handle the real temps.

11

I do not. In fact, of the manufacturers who actually list a maximum ambient temp for their similarly sized NEMA 17 stepper, many spec 40°C. I’ve not found one with a spec higher than 50°C.

Note that the two stepper motors are slightly different – same motor but different shaft lengths to accommodate the two different belt positions.

12

Hi
Thanks for your help , I have ordered spare set from sovol just in case . I may have a look to see if there is any way I can get cooling to the bottom of the motors .