The stock power supply is not powerful enough to heat the bed over 50-60° and it takes ages to reach this temperature. It virtually makes printing ABS impossible.
Feeding the bed with a 24V/100W power supply allows the bed to reach 50° in less than 2 minutes and the temperature can raise up to 110°.
Here is the kind of power supply you can use (the one shown is a Mean Well SNT MW100-24 but any 24V/100W PSU will do the job):
To use the temperature regulation of the heated bed you need to insert a power extender between the heatbed output of the controller board and the bed.
You can buy a ready made one or build it yourself from scratch.
Here is one you can buy from Reprap.Me :
Or below you can find the schematics and implantation to build one yourself :
Components list :
- 1x IRLU8743PbF MosFet
- 1x SFH610A-1 Optocoupler
- 1x 1N4148 Diode
- 1x 1.2K Resistor
- 1x 2.2K Resistor
- 1x 2.7K Resistor
- 2x 2-pole Terminal block
- 1x 4-pole Terminal block
- 1x Strip Grid PCB
While you're at it, you can replace the stock 15V power supply with a more reliable one like a Mean Well SNT MW100-15 :
Various housing designs are available on thingiverse :
Link to this design by eytec on Thingiverse
Link to this design by turbotommi on Thingiverse
Link to this design by stimpy on Thingiverse