On Sat, 12 Jan 2008 18:53:34 -0800, you wrote: >In the manual, Figure 5B shows the braking option, which is a manual >switch and relay. The switch activates the Inhibit and relays in the >braking and disconnects the armature power. Steve, I got the impression >that you have the same arrangement except you have two parallel port >pins controlling a pair of relays. One to activate the Inhibit/braking- >resistor/armature-disconnect and another to set the armature direction? >Plus, there is an Inhibit delay somewhere in there?
No - I don't use the braking, I don't find it necessary on the mill. I do use two pins and two relays, the on/off cuts the mains to the KB, the CW/CCW simply reverses the output. The delay is set in the software configuration, Mach3 in my case, but I'd be surprised if EMC can't do that too.. The diagram shows a relay that shorts the motor armature through a resistor. >Thank you for this information. I don't have a Sherline class machine, >so, I have no practical feel for how these machines behave. Neither do I, Mill spindle is toothed belt driven running from a "3HP" 180V DC motor. >> and it stops even quicker with a tap embedded in the work <G>. > >Maybe there's an EDM project in your future? Got a tap buster, personally only had to use it once when I broke a 3mm tap in a casting (hand tapping). >What do you use for an automated gear change, tool changer, oiler, parts >catcher... I don't. All done manually. BTW - please just reply to group, not to me direct as well. Thanks Steve Blackmore -- ------------------------------------------------------------------------- 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
