This might be a good time for me to mention what some Dynapath controls have for this situation.
They have a front panel button called "Recover". When pressed the first time it sets the feedhold mode and prepares to remember the next (up to three) manual jogs that the operator makes. So it's like those old jokes about getting three wishes from a genie, you have to be very careful what you ask for at this point and don't waste your "wishes" (jogs). Maybe this was due to the limits of the older control technology, probably a newer control (EMC2) could just remember any number of jogs, much as the recent discussion of how it's not necessary to drip feed big programs (on EMC2) anymore. Anyway... So let's say you're doing something fairly complex, like back-trepanning on a lathe (face grooving on the inside face). And it starts making funny noises and you think the insert has gone bad, so you want to look. Or maybe you just know from experience that a bunch of stringy chips are wadded up in there, and you have to get them out. So you use your first jog to get out of the groove (-Z), then move the boring bar to the center hole of the part (+/- X, depending on your lathe), then use your third jog to get the boring bar all the way out of the part (+Z). You stop the spindle with a manual stop switch. Now you can change the insert or remove chip strings or whatever fixes the problem. When you're ready to resume, you release the spindle stop, and press "recover" again. Now the machine recovers, and retraces the manual jogs in reverse order, probably with you nervously creeping the Feedrate Override knob. When it finally settles back into the original position (where you pressed "recover" the first time), then the "recover" cycle is complete, the feedhold is canceled, and program execution resumes. Anyway, it can be a handy feature sometimes. I hope this information is helpful. Thanks, Kim Terry wrote: > Leslie, > > I am not opposed to this change and if there is enough > intrest in this then great. > > I think that a better feature would be a "tool check" > Cutter is loading up(or whatever problem),you hit the > tool check button and the machine would move to a safe location > and go into a pause mode.Fix the problem and hit the tool check > button again and machine would go to where it was when the button > was pushed(or maybe the line right before it. > It would be pretty close to what an M01 would do but > with a move away and back. > There is going to drawbacks for this but it might be useful. > > > > Later > > Terry > > > > On Mon Jun 22 4:02 , Leslie Newell <[email protected]> sent: > > >>Hi Terry, >> >> >>>Having a tool presetter or not,at some point in time you have to >>>inform the control how long the next the tool is. >> >>Of course. >> >> >>>then you put the next tool in and >>>touch it off, write it in the tool table in the T2 line >> >>You need to manually jog to touch off the tool. It doesn't matter if you >>need MDI or not, you still have to stop the program. Not sure why you >>bother with manually changing the tool table though. The touch off >>button in Axis does it for you, though it needs to be able to use MDI >>mode to do it. >> >> >>>then scroll down to T2M6 in the prog and right click and hit start from here. >>>I think that is pretty easy. >> >>Yes, but prone to errors, especially if you have a long program with a >>number of tool changes. It is a lot easier to simply press cycle start. >> >> >> >>>Replacing broken tools goes like this for me: >>>Groan loudly hit esc,jog out of the way,pick up >>>what is left of the tool and throw it at >>>the wall as hard as I can. >> >>LOL. Being able to jog halfway through a job doesn't really help with >>this situation. Unless you have superhuman reflexes you will still have >>to back up the program to the point where the cutter failed. >> >> >>However, where it is really useful is if the cutter starts loading up >>with swarf. I regularly machine sheet plastic (acrylic engraving >>laminate). While plunging the cutter often gets a lot of swarf wrapped >>around it. After a couple of plunges you end up with enough tied around >>the cutter to start rubbing and burning the surface of the work. You >>then need to pause, lift the cutter and clear the swarf. This is a >>production job, not hobby use. I have experienced similar problems often >>enough on my lathe as well. >> >> >> >>>I view the developers time as super-valuable and would not >>>like to see them spend time on this when there are other more >>>important things on their plate. >> >>My point is that being able to jog/use MDI during a manual tool change >>should be a relatively trivial task that makes life a easier for a lot >>of EMC users. The other day I was talking to an OEM who was trying to >>choose between EMC and Mach. He was pretty enthusiastic about EMC until >>I told him you can't jog during a tool change. As far as he was >>concerned that was a show stopper and he went for Mach. >> >>Being able to jog during pause is not nearly as easy and would involve >>quite a bit of work. >> >>Les > > > > ---- Msg sent via CableONE.net MyMail - http://www.cableone.net > ------------------------------------------------------------------------------ > Are you an open source citizen? Join us for the Open Source Bridge conference! > Portland, OR, June 17-19. Two days of sessions, one day of unconference: $250. > Need another reason to go? 24-hour hacker lounge. 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