Still undecided as how to resolve the tool change challenge.
I am deliberating on two solutions Option #1 Use a DC servomotor like a Homeshops 850 oz-in and a drive like the Gecko 320. This will allow positioning the spindle with plenty of accuracy and spin my cutter at around 3,000 RPM. Since the Gecko drive has a step and direction input I hope to be able to reconfigure the HAL code to use A step generator to control the spindle rather than the PWM generator. The one downside is less horsepower than I would like. Using the servomotors I have seen with a gecko 320 delivers a shaft power output less than 1HP, I would prefer 2HP. I continue looking for alternative motors and drives that could provide more HP. Suggestions welcome! Option #2 Use a Variable frequency drive like a Durapulse GS3 this has A flux vector mode (as suggested by Andy also thanks for the video clip) and a inverter grade induction motor. I have talked with techs that work for vendors of these types of drives and have received conflicting opinions as to whether I could position the spindle with enough accuracy for my tool change. I suspect this would work but it could also be an expensive disappointment! It would be very helpful if I could locate some one who has real world experience using these new variable frequency drives, particularly if they are using EMC2 also. ------------------------------------------------------------------------------ This SF Dev2Dev email is sponsored by: WikiLeaks The End of the Free Internet http://p.sf.net/sfu/therealnews-com _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users