Simplify3D User Forum

It's a pretty common problem for some Marlin printers out there to not reach proper bed temperature (a degree to two less than the set requirement). This will cause Simplify3D to never print (it just sits for hours trying to heat the bed another degree.

In order to get printing automated (bed temp actually get the temp it should get to) I would like to see the following setting added:

Bed Temp Fudge Factor: [---] C.

If I was to set this to "2"; and if my printer actually says its actually 118 instead of 120 Simplify3D will actually start to print.

I'm not an expert on Marlin, but it sounds like your PID integral constant is zero.
Try tuning your PID:

http://reprap.org/wiki/PID_Tuning

Or a dirty hack:

Set the temperature using M140 S[bed0_temperature] (this should not wait for the bed to reach target temperature) remove M190 and then add a dwell G4 S360 (or whatever seconds are enough for it to heat up)

Disclaimer: Not tested! It could definitely not work!

You can turn the wait to reach target temp on and off right in your process settings