![]() ![]() ![]() NOTE: Some boards have a potentiometer that adjusts in the opposite direction. If adjusting the current does not help, double check to make sure that all eight of the wires to the motor are firmly and correctly attached in the terminal blocks on the EBB. ![]() More current, while increasing the motors torque, leads to jerky moves, with position errors (e.g., stair steps). Often, this is about half way CCW, maybe a little less. The ideal setting is one that provides smooth, relatively low-noise moves from the stepper motors, but has enough torque that the pen arm is not "floppy". With the Eggbot powered on and the motors engaged, as you increase the current - turning the control with a small screw driver CCW - you should be able to feel the motors increasingly resist moving by your hand. Starting with the control turned all the way clockwise (CW), both motors should be very weak (note that not all potentiometers have a stop to indicate the end of the turning range, and some potentiometers adjust in the opposite direction). The current increases as you rotate the control counter-clockwise (CCW). If the current is too strong or too weak you may see (or hear) these symptoms. The control is labelled "CUR ADJ" on the board. This is a physical control - a potentiometer - on the EBB circuit board mounted to your Eggbot chassis. ![]() Motors producing "Stair steps," Motors are loud or make whining noises, Motors get very hot:Īre your motors simply not moving? Does your plot appear to have "stair steps" or jagged lines? Are the stepper motors loud or whining? Are they running so hot that you can't touch them? You likely need to adjust the "Current Adjust" control on the EBB board with a small screwdriver. 10 Eggbot stops working after printing for a long time.9 Clicking "Apply" in the Eggbot Control extension does nothing (Windows XP).8 Copy/Paste not working correctly (OS X).2 As soon as I plot, the pen arm swings to one end or the other of my egg and stays there. ![]()
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