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I'm using NEMA17 17HS13-0404S1 stepper motors with Arduino CNC Shield & A4988 drivers but I think they're much slower than they should be. Hard to explain how slow they are but compared to Ender 3 Pro 3d printer, they move slow. And also I checked some other step motors from Youtube, seems slow compared to them too.

Here you can find the data of my stepper motor: https://www.omc-stepperonline.com/nema-17-bipolar-1-8deg-26ncm-36-8oz-in-0-4a-12v-42x42x34mm-4-wires.html

I set A4988 Vref to 0.30V (calculated is 0.32 but for 10% margin recommendation, I set it to 0.30) and I'm using 1/16 microstepping.

As power supply, I use 24V, 4.5A power supply and connected it to CNC shield directly (which powers A4988s)

What might be wrong about my stepper motors?

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  • \$\begingroup\$ how fast are you driving it? \$\endgroup\$
    – user16324
    Commented Feb 13, 2020 at 17:47
  • \$\begingroup\$ @BrianDrummond I'm not sure about how can I measure it, mm/sec? \$\endgroup\$
    – she hates me
    Commented Feb 13, 2020 at 17:59
  • \$\begingroup\$ Were you using 1/16 microstepping with your previous driver? \$\endgroup\$
    – evildemonic
    Commented Feb 13, 2020 at 18:06
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    \$\begingroup\$ Those drivers are pretty simple: 1 pulse = 1 microstep ... so either your pulses are coming in too slow, or you are using a higher fraction of microstepping than you realize. \$\endgroup\$
    – evildemonic
    Commented Feb 13, 2020 at 18:09
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    \$\begingroup\$ If you're microstepping that's 640 microsteps/second. What's your software doing? So far there's no evidence at all that there's anything wrong. \$\endgroup\$
    – user16324
    Commented Feb 13, 2020 at 20:03

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