> John, Peter, et al. > > I found the problem with the "current" (Mesa 7I33 AUX Power). It was > really > stupid. It is a 0 to 10V analog for laser power where the sign matters. > The > value was coming out negative. I changed the gain on the DAC to -1, and > everything is working fine. Cool - glad you found the problem.
> The problem I have now is with the outputs coming on while the computer > boots. On this laser, E-Stop is a last resort and has an E-Stop separate > from the CNC. Normally one has to use its startup and shutdown method. > Thus, > if the laser is on, it starts going through its startup sequence while the > computer is booting, because the m5i20 outputs are on. Is there any way to > force these outputs off prior to when EMC starts? You can use bfload and pci_write in an init script to set the outputs to some known state early on, but there is still time during BIOS POST and early boot that the outputs will float. You can use external pull-up and pull-down resistors to set pin state. I'm pretty sure that is the only way to set outputs the way you want during early boot. You can also use a relay or charge pump in the E-Stop chain - that should prevent anything from happening on the machine before EMC is running. - Steve > Thanks, > Eric ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
