On Sunday 13 January 2008, Steve Blackmore wrote: >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).
I had to use a home made edm setup to remove the last 2 broken 6-32 taps here. Pieces salvaged just fine, but with my home made puny power setup, it was call a surveyer & set stakes slow. I had the time since I'm retired, and I've since ordered up enough power components to cut that time by 90% if I have to do it again. >>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 -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Whenever people agree with me I always feel I must be wrong. -- Oscar Wilde ------------------------------------------------------------------------- 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
