I converted a 20 year old CNC engraving machine into a 3d printer. It is a new hermes 7200. I got it working pretty well. The main area I am working on is trying to get it to move faster. At first the most I could do was 15mm a second. I put in new stepper motors (Nema 23) and made sure the inductance is low. They are not very high quality ones. The inductance is around 3% and at the moment it’s set for 2 amps. I don’t need a lot of torque since it won’t be cutting. If I go too fast it will miss steps and jerk. It’s a pretty big machine so it’s hard to figure out what I need and what is even possible. I turned the acceleration down to 200 from 3000 and was able to increase the speed up to almost 60 mm a second. My question is are there any other settings I can adjust besides acceleration that can help increase the speed the steppers can go without losing steps. Also, would a higher quality motor do a better job and if so, what kind should I look at? I am using the built in drivers on the smoothieboard. I can go with external drivers if needed but I want to make sure that I am not missing something else I can try. What speeds can a typical 3d printer reach? Thank you very much for your help.
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