Hi everyone,
I'm designing a stepper motor driver using the LMD18245T 3A, 55V DMOS Full-Bridge Motor. My circuit is very similar to this one http://www.avrstmd.com/. I'm using a 8 lead motor connected in parallel (phase R = 1,1hom; phase L=1,7,mH). I'm using microstepping control (2, 4, 8 and 16 microsteps/step). I'm powering the circuit with a 50V, 5A power supply, and the LMD18245T is configured in order to reach a maximum of 3A/phase.
My problem is that I can not reach speed over about 350rpm. But I have seen projects using the same configuration (for example this one: http://www.embeddedtronics.com/microstep.html) that claim to reach much higher speeds, around 1500 rpm.
Does anybody have any clue what could be the problem?
Thanks!
I'm designing a stepper motor driver using the LMD18245T 3A, 55V DMOS Full-Bridge Motor. My circuit is very similar to this one http://www.avrstmd.com/. I'm using a 8 lead motor connected in parallel (phase R = 1,1hom; phase L=1,7,mH). I'm using microstepping control (2, 4, 8 and 16 microsteps/step). I'm powering the circuit with a 50V, 5A power supply, and the LMD18245T is configured in order to reach a maximum of 3A/phase.
My problem is that I can not reach speed over about 350rpm. But I have seen projects using the same configuration (for example this one: http://www.embeddedtronics.com/microstep.html) that claim to reach much higher speeds, around 1500 rpm.
Does anybody have any clue what could be the problem?
Thanks!