Also, I bought a stepper driver on eBay but it seems that the nema 11 stepper that is on it runs much hotter than the one running on the original BB purple driver. Any comments on that? Where can I buy a stepper driver identical to the Ones that shipped with the BB kit here in the USA? Thank you.
Greg said that he turned down the Vref for the Nema 11 drivers to 0.29v (for his TMC2100 drivers) and it was fine. Can you turn down the ref. voltage while still getting reliable stepping?
Greg, I just finished the build of my IDEX plus Nimble box and I have a couple of questions. The X carriages cannot quite reach the front of the bed; the Y belt tensioners block them. Are there modified y belt tensioners I should be using (along with longer y axis belts)? I also noticed that it can't quite reach the back of the bed, but that it because I am using a modified X-axis stepper mount which blocks the last 10mm or so of range. This I can fix but a slight cut down of the Y-axis stepper mount. Thanks for your help, Greg!
Did you put a PTFE tube between the bottom of the Nimble and the top of the hot end? I am having problems with extrusion (with T-glase).
Yes! PTFE has to go snug tight up to the nimble (must have, if not you have a big chamber where the filament will curl and bend).
Thanks! That is what I did. Another question: What is the difference in height between the end of the extruder and the bottom of the cooling fan? I am finding that running the print cooling fan any faster than about 35% results in the hotend not being able to maintain temperature ( so I am wondering if the fan is blowing more on the heatblock than it should be)
The distance you ask about is 2 or 3 mm. What you need is the silicone boots for the extruder, they work VERY well. Get the pack of 3 from e3d or filastruder it's well worth it because it will solve your problem AND prevent the heat from the heater block to radiate to the part. Very helpful with small prints.
Greg, For some reason some critical values will not update when I flash the machine... some others do! Look below the circled values show my new data for using the Zesty Nimble, but the machine still shows the old defaults... Any ideas? Are some of these #defines hard coded somewhere?
Try loading factory default with M502 (http://reprap.org/wiki/G-code#M502:_Revert_to_the_default_.22factory_settings..22) Then store with M500 (http://reprap.org/wiki/G-code#M500:_Store_parameters_in_EEPROM)
I bought the longest available 95cm, it allows for installing the motors at the same height / location of the Bowden setup on the back of the BB. I guess any length would work, you would just have to move the motors higher up on the back panel.