1. The Preheat in Maintenance, By selecting the preheat in Maintenance,The build plate will start heating,You can choose the heat time from 15min to 60min. When the time is up,The heating will stop. The temperature will reach to 90 degree Celsius.
2.The Preheat in Print Setting,By selecting the preheat in print setting,The printer will heat 15 minutes before the printing, and reaching the temperature according to the material's requirement then the extrude start to heat up, and then start the printing, The heating time is not selectable.