I recently started printing a lot with ABS.

Controllers Smoothie
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1

I recently started printing a lot with ABS. My bed temp is 110C and I have burnt 3 connectors. I am using 14 gauge wire. I have tried tightening all connections prior to starting the print and the prints usually runs about 10hrs. My unit sits in a closed container which runs about 103deg during printing.

How or can I hook up and external Mosfet to this board. I am currently using P2.5 for the Heated Bed and P2.7 for the Hot head.

Or

Should I hook the heated bed to P1.23 with a separate power supply.

My Hot head shows no signs of ware and it is set at 215C

any thoughts

Tim

2

Same connectors the heated bed uses now, just run the power directly to the mosfet.

3

You shouldn’t be burning connectors, there’s a problem to solve there first. What is the current rating of the bed ? What do you have connected to each/all of the mosfet, and what is the current rating for each ( don’t omit any ) ?

Also what runs at 103degs ? Are you saying the Smoothieboard is in a 103deg environment ? If so, that’s your problem, if not what temp does the Smoothieboard run in ?

4

You left one crucial thing out… What voltage are you running?
Running it on 12v with >120w bed is begging for problems in hot environment…

There’s same issue with geeetech g2/s delta printer… And can be traced true gt2560 board revisions. Instead of paring it with 24v supply.

5

Enclosure is 103 degrees F or C? Either way I hope your electronics aren’t in that.