Thank you for the info. I made the change and recompiled. Tested the movement and the same problem persisted. Y-axis motor jittery and staying in place. Tried going through all the same permutations as the previous testing: Changed cable Changed stepper controller Swapped stepper motors between X and Y axis. etc... The problem persisted on Y-axis (configured on E1 socket on RAMPS). Figured thby lapo - RAMPS Electronics
My bad. I should have proofread the original post better. I only have one "Y" stepper. The eprom step settings are unchanged for the movement steppers. Any other thoughts? Thanks. Is it possible to reconfigure the RAMPS to use the spare stepper controller socket for the Y axis? How does one go about doing that?by lapo - RAMPS Electronics
Hi all, I'm working with a custom built delta using a RAMPS 1.4 board. The printer has been working fine for about 18 months but I recently decided to upgrade the extruder. While doing this I adjusted the voltage on the extruder stepper driver (change in stepper motor). The extruder works fine. After doing this, one of the Y axis stepper motor stopped working. Any time I try to issue a move coby lapo - RAMPS Electronics
I tried reducing the baud rate to 115200 but it made no difference. I've now tested with a reduced maximum speed to 40mm / sec (for moves as well as printing) I didn't get any missed steps. Given the mass of the mechanics, and the size of the steppers (up to 1.4A), I'm sure I should be able to go faster than this but if I increase Vref to 1.6V (which with my red Chinese A4988 clones should giveby lapo - RAMPS Electronics
I've finally found time to test shorting the 5A polyfuse but it has made no difference. On the baud setting for the port, I'm running the printer via Octoprint and it and the Repetier firmware are configured to communicate at 250000. Is this not reliable on RAMPS? Thanks.by lapo - RAMPS Electronics
With regards to the stepper drivers, I have them set to 1300 mV which should in theory give me 0.8A at the stepper. (8 x 200 x 0.8 = 1280mV) Anything more than this and the steppers go over 70C. The actual stepper drivers don't get over 25-30C measured on the heatsinks which are glued to them. Is it possible to overdrive the stepper motors and cause missteps? With regards to the polyfuse, Iby lapo - RAMPS Electronics
Thanks for the suggestion. I'm quite sure this is not the issue as, if anything, the extruder is under extruding at the moment. I initially thought it might be related to acceleration values while moving so I've tried reducing acceleration and Jerk values in firmware right down (using Repetier firmware) as well as raising Z while traveling, but it hasn't helped. Hence my question about the possiby lapo - RAMPS Electronics
I"m hoping this is the right forum for this question. Apologies if it should be in the Delta section. I am trying to get a delta printer working reliably but can't seem to remove occasional missed steps. I am confident that the mechanics of the printer are good. There is no play in the effector mechanism (magnetic arms), movement is nice and smooth and homing is still accurate after not havingby lapo - RAMPS Electronics
I've recently bought a cheap kossel mini kit which came with a board I have not seen before. I've been trying to search it up on the internet but can't seem to find any information. On the PCB it the model is listed as MKS MINI-B V1.0 There is plenty of information on the MKS MINI V1.0 out there, but nothing on the -B variant. As far as I can tell, the main difference is in the onboard support fby lapo - Controllers
Thanks Gaou for the suggestions. I agree with you that the layer height may well be to blame, but it seems to be that the .3mm nozzle is a lot more temperamental to the .5mm. Its also very slow in comparison hence my desire to go back to .5mm. I am tempted to ream out the nozzle with a .5mm bit but I'm afraid of damaging it now that I can't easily get a replacement from Reprappro... With regarby lapo - General Mendel Topics
I recently had a hot end meltdown on my legacy mendel from reprappro and rebuilt it using a .3mm nozzle as the .5mm was out of stock. Since then I've been unable to get consistently good prints, with the PLA either not sticking to the heated bed or the layers not bonding together very well. I decided to go back to the .5mm nozzle but obviously can't get one from Reprappro as they have shut shop.by lapo - General Mendel Topics