Disclaimer: This has not been tested on a cartographer equipped machine, it has been mentioned that the magnetic mounts under the bed may be strong enough to throw off the bed mesh, cannot confirm nor deny at this time.

This is a fan setup to circulate the bed's radiant heat across the chamber for materials that require a higher chamber temperature. 55c-65c is easily reached within 5-10 minutes (dependent on drafts and ambient temperature) after bed has reached 100c. There is splicing/soldering required to utilize the exhaust fan for control. You could use jst connectors and go that route, I bought Rc transmitter connectors from a local store, to each their own.

Pics are included of most the process, but due diligence and proper research about wiring and testing should be first and foremost.

On my K1 max the black w/ white stripe is positive, double check yours before proceeding. There are spots for magnets 6X3mm and allows easy removal if wanted/needed. Longer M3x15-20 mm button head bolts will be required for mounting with accompanying washers and nuts. After replacing required bolts with longer ones and tightening strain gauges down, the bases that house the fans will be mounted to the front inner two strain gauge bolts on the K1 max and the rear two on the K1 and K1c on the underside of the carriage plate. By doing this modification, you will lose just over 7mm of z travel, not a big deal to me but may be to some. I have not written that limit into my g-code as I never go that low but can be fixed in the printer cfg file. Fans will be wired in parallel. I used double sided tape to mount the wiring, any type of fastening should work just make sure not to pinch the wiring during mounting of the bases.