... not to make the MOTOR too hot and broken. If the Material-sending Roller can not run smoothly, ... at once and check. Adjust the chain and screw if they are loos. 4. Do stop themachine when there is ... you should:firstly, check the Adjusting-and turing key; if it can not work effectively, place a new one ... send material smoothly, which can also be avoided if proper amount of powder are added to the Roller ...