Monoprice Mini 3D Printer Bed Upgrade

A low cost bed upgrade that adds a second slave heater to allow the bed to reach 110C and also makes the bed flatter and more rigid.

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I have been interested in 3D printing for some time but couldn't justify spending $500 or more just to play. Then I found the Monoprice mini 3D printer through Hackaday. It is a well built low cost printer for $200 and I knew that Monoprice's service was excellent so I bought one, but I found the bed was not very rigid making it hard to level and the bed heater was not powerful enough to heat it beyond around 75 degrees. That is not enough for ABS printing. I have fixed both problems by adding a second "slave" heater bonded under the existing bed. The pictures show the final modified machine and the before and after flatness of the bed. The mod cost me around $15 but if you had to buy everything, the cost would be between $30 and $40.

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Bob Ryan wrote 09/22/2016 at 04:01 point


I, as many others, have replaced the stock power brick with a spare ATX supply I had laying around. This PSU can source 20A+ on the 12v rail. Did you do any investigation of the on-board heatbed driver? I'm curious if we can simply disconnect the stock heater and operate this new 8A heater using the stock electronics.


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