Hi, I've got an Prusa printer with Ramps 1.4 and Sprinter.If i connect to Pronterface i can manually heat up the hot-end to 230 C but if i start printing, Pronterface wait until the hotend cool down to 197C and start printing ,but the ABS can't melt and the extruder can't extrude. I set the hotend's temp in the Pronterface and in the Slic3r but it isn't help. I don't know what need to do, i hope anyone offer some advice?