neptuna 0 Posted August 14, 2016 in UM2 Mainboard Stepper Driver Hi everyone. I am building my first 3D printer. I assembled everything. But when I turn the printer on, the stepper motor connected to the Y-axis is not turning, it steps forwards and backwards and makes strange movements (as if it vibrates). All other steppers turns smoothly. I replaced the steppers so the problem is not the motors. Something is wrong with the Y-axis driver on the main board. (I order the board from China since the genuine one is 3-4 times more expensive in my country.) I am not familiar with the stepper drivers or arduino so my question is this, is there something wrong with the driver (a4988) or something wrong with the software or other electronic (resistors or something.)? Has anyone experienced that behavior before? Thank you in advance. Share this post Link to post Share on other sites
Dim3nsioneer 358 Posted August 14, 2016 in UM2 Mainboard Stepper Driver Quite a number of people had troubles with China cloned mainboards. The only working way out of it I know is the expensive one (buying the genuine Ultimaker board from a reseller). Share this post Link to post Share on other sites
gr5 897 Posted August 14, 2016 in UM2 Mainboard Stepper Driver If one of the 4 wires is broken you will get similar results so swap the Y stepper with another stepper just to make sure it's the board. If the problem is still with the board then you should just buy a whole new board. It could be many components - the driver itself or any of the capacitors or resistors nearby. Or a bad board etch (not likely). Share this post Link to post Share on other sites
ultiarjan 1,076 Posted August 14, 2016 in UM2 Mainboard Stepper Driver (edited) On a um2 board you have a extra output for a stepper. You could probably remap this extra one to be the y-axis in firmware assuming you don't need dual extrusion.... I think it has been described on this forum before but i'm to lazy too look for it now as I'm on my phone.... so see if you can google it.... otherwise ask again.. Edited August 14, 2016 by Guest Share this post Link to post Share on other sites
neptuna 0 Posted August 15, 2016 in UM2 Mainboard Stepper Driver If one of the 4 wires is broken you will get similar results so swap the Y stepper with another stepper just to make sure it's the board. If the problem is still with the board then you should just buy a whole new board. It could be many components - the driver itself or any of the capacitors or resistors nearby. Or a bad board etch (not likely). I try that, it is not about the motors, something is wrong with the board. Share this post Link to post Share on other sites
neptuna 0 Posted August 15, 2016 in UM2 Mainboard Stepper Driver On a um2 board you have a extra output for a stepper. You could probably remap this extra one to be the y-axis in firmware assuming you don't need dual extrusion.... I think it has been described on this forum before but i'm to lazy too look for it now as I'm on my phone.... so see if you can google it.... otherwise ask again.. This is exactly what I think but I can not find anything. Share this post Link to post Share on other sites
tinkergnome 586 Posted August 15, 2016 in UM2 Mainboard Stepper Driver This is exactly what I think but I can not find anything. Swap Y-Axis with E2-Axis Share this post Link to post Share on other sites
neptuna 0 Posted August 15, 2016 in UM2 Mainboard Stepper Driver Thank you very much. This is exactly what I think but I can not find anything. Swap Y-Axis with E2-Axis Share this post Link to post Share on other sites
neptuna 0 Posted August 15, 2016 in UM2 Mainboard Stepper Driver (edited) Thank you all for your help Edited August 15, 2016 by Guest Share this post Link to post Share on other sites
