https://forge.codesys.com/forge/talk/automation_server/thread/9db586450c/2025-02-21T06:53:41.381000ZRecent posts to Confused about stepper spec & tips on pwm-step/dir2025-02-21T06:53:41.381000Z2025-02-21T06:53:41.381000Zcarl25https://forge.codesys.com/u/carl25/https://forge.codesys.com784f071cc5a736b0ce495970c465c0d1cc576ed8

<div class="markdown_content"><p>Hello!</p> <p>I have asked the few I know who have knowledge of this and now turn to this one inexhaustible source of knowledge aka. the electronics forum.</p> <p>I was going to buy stepper motors yesterday but got so confused about the spec that I need to get an answer to this first. 2 different stepper motors, quite close in size but with very different spec.</p> <p><a href="https://www.oyostepper.de/goods-40-Nema-17-Schrittmotor-Bipolar-12V-18-Grad-40Ncm-04A-12-Volt-4-Dr%C3%A4hte-Hybrid-Schrittmotor.html" rel="nofollow">https://www.oyostepper.de/goods-40-Nema-17-Schrittmotor-Bipolar-12V-18-Grad-40Ncm-04A-12-Volt-4-Dr%C3%A4hte-Hybrid-Schrittmotor.html</a></p> <p><a href="https://www.oyostepper.de/goods-38-Nema-17-Schrittmotor-Bipolar-18-deg-22Ncm-133A-28V-4-Dr%C3%A4hte-Hybrid-Schrittmotor.html" rel="nofollow">https://www.oyostepper.de/goods-38-Nema-17-Schrittmotor-Bipolar-18-deg-22Ncm-133A-28V-4-Dr%C3%A4hte-Hybrid-Schrittmotor.html</a></p> <p>Both Nema17 but the first 1.33A and 22Ncm and the second only 0.4A but almost double the torque.</p> <p>I can see that the resistance is very much higher on the latter but what's the catch?</p> <p>Double the torque to 1/3 the current sounds a little too good to be true so what am I missing?</p></div>