On Monday 12 September 2016 10:42:38 andy pugh wrote: > On 12 September 2016 at 15:27, Gene Heskett <ghesk...@shentel.net> wrote: > > > Feed-hold can be masked and unmasked with the G53 command, feed > > > inhibit can't. > > > > I see. Possibly a huge difference. Generally, my use of g53 is to > > reset the user coordinates back to sane values > > Sorry, my error. I meant M53. > > http://linuxcnc.org/docs/2.7/html/gcode/m-code.html#mcode:m53
Hmm, some interesting things there, and not well studied by me yet. One snippet looks useful, as in a single command to configure the machine either as metric, or imperial. Too often I find myself using a calculator, which of course is subject to 'bitton' push errors. :) If and when this Sheldon is actually making swarf, I might explore that. But that is not going to be until November at my present rate of progress. I made the alu piece to hold the gear detectors, but haven't cut the pockets to put them in yet, and Go-2 glued a small piece of screw to the side face of the big gear for an index pulse. In the process found the upper drive belts were "lumpy" and not very tight. They've been loose long enough to have worn away a casting flange at the bottom of the bed, or in the top of the foot, hard to see. Putting some tension on them reduced the rumble & vibration quite a bit. Major disassembly of the headstock end of the lathe is required to replace them. But I now have the x axis ball screw well shielded from swarf. I machined a 1/8" deep ledge in the top of the crossfeed and glued a 1x.125" strip of stock alu about 15" long into the recess, so its covered from the top, and the saddle had bed clearance enough that I could do the same below the screw but with 24 gauge metal. Made new way wipers out of an old felt hat. They work sweet, keeping a film of oil on the ways. I can push it full length of the bed with about a 3 lb push. Taking the OEM apron off leaves room to put a real, full length gib on the front instead of those two postage stamp sized bits of steel. Wear on the bottom lip of the bed is considerable as the right hand one was used for a carriage lock, and had been over tightened, actually bending the bolt such that there was no place you could turn it that was actually free. So my brass piece is going to reach beyond that wear, and will have several more bolts to hold it. It will need a bit of shimming for the proper fit of course, but that has to be a considerable improvement over the state it was in when we set it down in the u-haul. The new apron is a 1/2" thick alu slab about the same face size as the old apron, with a window cut in the center for the x motor to be mounted on an 1/8" sliding plate for timing belt tension adjustments, so the new Z screw has to be hung about as high as I can get it so it clears the motor. Higher also helps reduce the leverage on the saddle when its pushing hard, so that has to be a Good Thing. I'll have to make a pad to fit between the 2505 nut holder and this slab of alu, and all the spacing pads to allow it to fit behind another slab of 1/2" alu bolted to where the qcgb was, with the Z motor on the front of the slab, driving the Z screw thru a pair of 40 tooth timing pulleys. I've some bellows type covers coming to cover the Z screw with but I'll have to make the pieces the ends are to be clamped onto. That size is TBD until they get here, supposedly sometime this week. There will be, like your Holbrook, lots of one off parts in this puppy. All of which take time to make. :( The past thing I'll change out is the spindle motor. I have a steel box big enough to hold the xy motors drivers and psu's & keep swarf out of those, but it looks like the only place for the vfd to drive the 1 horse motor is under the left hand drawer. So I'll have to make brackets for that. But ATM, working on the encoder and trying to figure out how to get the wire out of the head but out of sight & safe from being chewed up by a spinning part. Which brings up another question: How oil resistant is common Beldon ribbon cable? Because its flat, I may use that, ground on one edge wire, +5 for the hall effect stuff on the other edge, and the ABZ in the middle. But it is going to get oily in there. Hence the question. Thanks Andy. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports. http://sdm.link/zohodev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
