Adrian / all, I've got a makergeeks kossel and have exact same issue, used for months but only started printing precision parts now. 25mm object comes out 26.6mm tall. Same deal with the motor too, 0.4A when general design recommendation is 1.5A (bought some, haven't put them in, prints well enough if i keep acceleration <1500). ....and son of a...17 teeth on these pulleys! Another thingby outerwave - Delta Machines
I have the belts as tight as i dare; defiantly can 'pluck' them. I'm not really sure if its catching on high spots, I initially thought not since I would see gradual layer shifting (few mm at a time) at 'medium' speeds, pushed a little further and I struggle to tell if it hit something and then went off, or went off and then hit the model. The nozzle has both ground into the model AND stutteredby outerwave - Delta Machines
I'll add that i've printed from my PC desktop, macbook and SD card with similar results. I was reading there might be a command buffer issue; still trying to validate that idea...by outerwave - Delta Machines
I've been working through most of this build on my own for a while and I'm trying to be more engaged online; if this is the wrong sub-forum for this please let me know... I built a Mini Kossel (kit from makergeeks..) running Marlin and initially suffered a lot of the problems others did with this kit, albeit unknowingly at the time. I've always struggled with print speeds. The direct drive extby outerwave - Delta Machines