A4988 Drivers
Vref set to ~90% of stepper rated current
Rs = 0.1ohm
X = 0,58v (0,725A)
Y = 0,58v (0,725A)
Z = 0,58v (0,725A)
E = 0,72v (0,900A)
Naming: [JK][S]HS[L]-[100][4]
JK: Manufacturer (jkongmotor) S: Size (42mm) HS: Hybrid Stepper L: Length (34/40mm) 100: Rated current 1.00 4: Number of wires
X, Y, Z: 42x34 1.8deg 0.84A 4xwires jk42hs34-0844 yal8-23
E: 42x40 1.8deg 1.0A 4xwires jk42hs40-1004a-02f
http://www.jkongmotor.com/Product/42HS-NEMA17-2Phase-Stepper-Motor-1-8%C2%B0.html
Dividing something with 1.414 is the same as multiplying something with 0.707. I’m not smart enough to see what the problem is. Hopefully some one else can help you.
Anyone familiar with the first version of the Sprite extruder that just screws on to a stock ender 3 x-gantry plate? BJ42D09-20V01 model number on stepper. Can't find anything on it. I'm running it at .8a, still cool to the touch tho so I'm hoping the documents here apply?
Since this thread is now kind of a database for all sorts of stepper motors, I'm also adding these for reference for others. I have those on my Ender 3 Max. I got the datasheets directly from the manufacturer Kelimotor by asking the sale assistant.
BJ42D16-26V09 -> apparently the same as BJ42D15-26V09
BJ42D15-26V09
BJ42D15-26V12
BJ42D22-23V01
https://drive.google.com/file/d/10bUmRyaTjHy4UPEDfP2xxpU4MgqT2sci/view?usp=sharing
Here is the BJ42D15-26V10 that i got from them, seems like the actual motor specs are the same as most of these so far.
Hi. I think you're wrong pal. I remember the electronic classroom in the first year and say0.707. i find this:
How to calculate RMS value of current?
Then, the RMS voltage (VRMS) of a sinusoidal waveform is determined by multiplying the peak voltage value by 0.7071, which is equal to one divided by the square root of two (1 / √2)