Spaceballs, I have pretty much the same setup but only with 269oz steppers and a 24v power supply. I was able to get to 240ipm and 170ipm reliably in testing stages. I now cut around 10-20ipm and rapid at 20ipm. For now this is good for me because it gives me time to hit the O**** button when I mess something up. Im not winning a race right now, but Im having fun learning without destroying to many tools or projects.
Were you moving the table @750ipm in the video. I know when I moved mine at 240 it was crazy. Touched the arrow key and the table was already at the other end. You might want to check the velocity under the coordinates, you might be able to set it for 750ipm but the computer figures if you move 8 inches your max speed might only be 80ipm so that it can come back down to 0 at the end.
With my current setup as well I have no problems at all with the z axis binding or loosing steps so I dont think you have to worry to much about torque.
And lastly I just did this yesterday but the screw that was holding on z axis coarse feed handles. If you drill it out to the same size as your allen key. You can tighten the z axis gibs just by removing the 3 screws. Keeping pressure on the large screw lower the z axis by the stepper motor and the connection point will slide down. Tighten the gibs, raise the zaxis and tighten put the 3 screws back in and your done. No need to take off the head just to tighten the z axis gib.
Good luck and have fun. |