STEPPERONLINE 0.9deg Nema 17 Stepper Motor Bipolar 2A 46Ncm/65oz.in 42x42x48mm 4-Wires DIY CNC

says nowhere in the description that it is open ended, assumed it would come with a 4 pin jst but nope. Spliced it to some spare cables I had with some wire nuts, I'll go back and solder them once I get some sleeves.Had to fiddle with the wiring. for some reason I had to wire B- to 2B, B+ to 2A, A+ to 1A, A- to 1B on my SKR 1.4 TMC2209, following the wiring of my old stepper that worked. Still had to invert the directions in the firmware.still messing around with stealthchop, but out of the box, on a 12v power supply, these things are stupid loud. if anyone has working stealthchop settings for them on 12v, please put them on the marlin github.

This stepper motor has been going strong with daily use for a couple of months now. The only issue is that it makes an almost musical tone as different voltages are applied to adjust the speed of the motor. I can't determine if its my controller or the motor, so they both get to share the blame.

A quality item at a great price

Added these to my Ender 3 and it drastically reduced the amount of vertical banding artifacts on my prints.I had to modify my printer for them to fit and replace the X and Y steppers, so they aren't drop-ins, but well-worth it for the extra trouble, just remember to also reflect the amount of steps per rotation in your config file.

The motor seems fine, I just got it today. If using for a 3D printer (such as my ender 3 running the latest marlin on an BTT SKR 1.4 Turbo main board) you will need to ensure the wiring is correct as the motor comes with bare wires and no connecter.The motor came with an information card that lists BLK (black), GRN (green), RED, BLU (blue) as A, A\, B, B\ respectively. This also corresponds to A+, A-, B+, B- in other associated data sheets, respectively. With a small pick you can de-pin your existing connectors from your old motor connectors to the main board, snip, strip, and solder theses wired pins onto the wires of the new motor and re-pin the connector with the wires from your old motors connector.When I followed the data card I kept getting errors in my terminal on pronterface ( motor coil shorted) and even blew a fuse on my board (no big deal thats what they're for) but thanks to another commenter I re-pinned the motor so that black goes to 1B, green to 1A, red to 2B and blue to 2A. This worked but required me to reverse the motor direction in the marlin firmware (#define INVERT_Z_DIR true). I imagine reversing the A group and B group in the connecter might counter this but I havent tried as its easier for me to just change a false to a true in the firmware and recompile.I attached the photo of the card with the corrected labels and a copy of my board connector for reference as most boards use a similar four pin connecter layout. My driver is a TMC2209 stepper driver. I will expand upon my review if I come across and issues or other useful information.

I updated my K40 with this motor after I had some steps start to jump around. It is quite as a church mouse and runs smooth as my fingers thru your moms hair. Get it don’t hesitate. I would have swapped mine straight out of the box if I would have know how great this thing runs. Increases my cut speed and accuracy.

I keep buying more of these. Good precision, good strength. I currently use 5 of these on a modified cr-10 with a Duet Maestro controller board.

If you're considering this motor for the 3.0mH inductance rating look elsewhere. I ordered 3 and the spec sheet that came in the boxes states 4.0mH. I sent a query to OMC support and they confirmed that the 4.0mH rating is correct. They said "The inductance is actually 4mH±20%. 3mH is the previous parameter. Later we made changes to the motor".The change from 3mH to 4mH results in a calculated top speed for a printer with 16 tooth 2GT pulley and 24V PSU of 150mm/s down from 200mm/s before back EMF causes torque loss. Very significant.For the price there are better options.As of posting this review omc-stepperonline website page for this motor has been updated, but this Amazon page still has the old and better 3.0mH spec listed.