My inclination is to try to get this working without replacing the z axis. I like the depth adjustment, since it eliminates a major headache with engraving PCBs, and the current (as it were) arrangement (two distinct drive levels) was functional at some point.
I've started looking into what options I would have to process G-code Z moves into various PWM or multiple signals--delving into the integrator's manual again. Many thanks for the ideas and cautions. --Dale At 6:27 PM +0100 9/21/10, Andy Pugh wrote: >On 21 September 2010 16:58, Dale Grover <[email protected]> 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 >[email protected] >https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
