Answered my own questions. First I had not realized you can change Rambo's driver current values in firmware. Good to know. Now the problem was weird. The values were actually set too high (not low). I think all the steppers were getting too much current and it was maxing out the draw on my power supply and actually causing the Z steppers to get less than they needed (while the other steppersby Docmani - Controllers
So I recently got my Lulzbot Taz clone up and running. It's running a cheapo Geeetech Rambo 1.2 board at 24v (I soldered a 15 amp fuse holder to it) I've had two problems so far: After its been running for a while, the Z Axis steppers 'click'. They twist and twist back very slightly at a regular 3 sec interval producing an audible click sound. Every so often it loses a z axis step and I getby Docmani - Controllers
I've started looking at this recently. I found this on EBay: Does the use of a geared stepper fix the torque problem? Has anyone used this?by Docmani - Reprappers
So new theory and it seems to be working.... I re-calibrated my stepper drivers and the problem actually got worse. I noticed that the shifts never occured mid-layer - only at the begining of the next layer. So I was wondering if the head was moving fast in a direction to get back to the starting point for the next layer, perhaps the momentum of the head assembly was actually pushing the steppby Docmani - General Mendel Topics
I will check the pullies, however I'd be suprised if the problem is there. The motors have a flat end and the nut in the pulley is against it. I imagine I would hear some nasty sound come out of it if it slipped. I will try a stepper driver swap and see what happens. I do appreciate the advice in troubleshooting this!by Docmani - General Mendel Topics
The belts were the first thing I checked before posting. They are pretty tight now.by Docmani - General Mendel Topics
I gave this a try. I retuned my stepper drivers and tried another print. This time, it shifted in the X direction. The stepper heat sink was fine. I could keep my finger on it no problem. Its always when the print head is making a big move across the print bed. I guess I can go lower on the accel? I'll give it a try. Its just weird as the accel is down to 800 on my firmware now. I'm using aby Docmani - General Mendel Topics
I've got my new Prusa Mendel working for the most part. I had problems with layers shifting so I lowered the firmware default_accelereation to 1000. That works for the most part, however when I print more than one part or a part with separate points, I still get shifting. It happens in both the x and y directions. I've included an example. Any suggestions?by Docmani - General Mendel Topics
So here is my first print on my brand new Prusa Mendel! Actually, my first prints had each layer offset at random distances (I lowered the default_acceleration as suggested on the wiki, and the problem went away). So this was at 0.4mm layer height with a 0.5mm nozzle. Not bad, but the top block appears to have had issues. I pretty much used all the default settings in Slic3r. This was a calibrby Docmani - Printing
Thanks for the help and advice guys!by Docmani - General
Hi, I'm new to the world of 3D. I am interested in building my own Mendel Prusa. A friend of mine offered to lend me his Solidoodle 2 if I wanted to try it out. I was debating trying to print my own parts kit on his machine. He seemed to thing the quality wouldn't be good enough. I was curious if anyone here has had luck printing out RepRap parts on other platforms (specifically the Solidoodle)by Docmani - General