On 21 September 2010 16:58, Dale Grover <dgro...@redcedar.com> wrote:
> Does anyone have specific knowledge about what they intended as drive > signals? I was tempted to replace the two circuits with just one, > with an adjustable one-shot to drive the solenoid full, then a gated > PWM to provide the holding current. (And replace those relays with a > MOSFET.) But then I wondered if drilling or milling required a > different set of timing than straight engraving? PWM sounds like a better way to go. In theory you could then connect the PWM to the Z-position-cmd in HAL. G0 Z1 would be full-power into the solenoid, G0 Z0.5 half-power, and G1 Z0.5 F20 (or similar) would be a slowly ramping PWM suitable for gently pushing a drill bit. Setting Z-axis max velocity would determine how long a G0Z0 took to complete, you could then follow each with a G0Z0.5 to apply the holding current. -- atp ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
