Currently I am using L297 with L298 to drive the steppers for my CNC.
The transformer to power each motor is 13.7V, (I am not sure how many amps, but I think it's at least 5 amps). Each motor (3 of them) is connected to it's own transformer.
Right now I get about 300 RPM, higher than that the motor stalls.
I wanted to increase the power so that I can get faster RPM, so I doubled the voltage using the rectifier attached. I measured the output voltage, and it showed 39V, the L298 chip fried in like 2 seconds !
The L298 data-sheet says that it can take up to 46V, so why did it fry ?
The motors that I am using are Nema23 M311 (for z axis), and also Nema23 M254 (for X & Y axis)
Second question: Do you know any chip that is better than the L298 (that can take up to 5 amps) for driving my motors ?
If you want to see my CNC, I posted a video with it in action on YouTube: http://www.youtube.com/watch?v=m2CYttY_xPg
The speed in that video is about 50% (to make sure it does not miss steps)
The transformer to power each motor is 13.7V, (I am not sure how many amps, but I think it's at least 5 amps). Each motor (3 of them) is connected to it's own transformer.
Right now I get about 300 RPM, higher than that the motor stalls.
I wanted to increase the power so that I can get faster RPM, so I doubled the voltage using the rectifier attached. I measured the output voltage, and it showed 39V, the L298 chip fried in like 2 seconds !
The L298 data-sheet says that it can take up to 46V, so why did it fry ?
The motors that I am using are Nema23 M311 (for z axis), and also Nema23 M254 (for X & Y axis)
Second question: Do you know any chip that is better than the L298 (that can take up to 5 amps) for driving my motors ?
If you want to see my CNC, I posted a video with it in action on YouTube: http://www.youtube.com/watch?v=m2CYttY_xPg
The speed in that video is about 50% (to make sure it does not miss steps)
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