Re: [Emc-developers] Got an almost show stopper buglet in the most recent 2.8.0-pre
On Tuesday 11 August 2015 05:16:55 andy pugh wrote: On 11 August 2015 at 01:45, Gene Heskett ghesk...@wdtv.com wrote: Thats tomorrows project, while I am mulling whether or not I make the jig, either air driven to bring it in or out, or, if I can figure out how to drive a cdroms tray motor to flip it down or up electrically. How about a rotary solenoid? http://www.ebay.com/itm/111625860989 Thats another possibility Andy, but that one, levered out to flip this bit of Mahogany, would have to be pretty stout in order to make its 45 degrees move the gauge close to 120 degrees. Its 3/8 thick, 1.75 wide, and about a foot long, swinging on a stick of piano hinge about that same length. Currently lays flat on the top of the white ash clamping platform when in the use position, or flips back out of the way by about a 170 degrees total turn of the piano hinge. Thats one of the reasons I was looking at a teeny double acting air cylinder with perhaps a 3 stroke, or the cd tray gear assembly mounted out on the end of the table with a plastic hose serving as the relay medium from its final reduction gear to a 1/4 dowel set into the end of the stick, near the hinge, driven by a geared way down tray motor assembly would adequately handle the axis of rotation miss-alignment caused by the dowels small arc motion. That would, by the time I got it boxed up for swarf saw dust shielding, be about the width of the table, an inch thick and 2 tall at the axel output just to get it pointed at the stick. Seems like a lot of box for what I want to do. Would some pix help? 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 -- ___ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
Re: [Emc-developers] Got an almost show stopper buglet in the most recent 2.8.0-pre
On Tuesday 11 August 2015 07:58:20 andy pugh wrote: On 11 August 2015 at 12:51, Gene Heskett ghesk...@wdtv.com wrote: Thats another possibility Andy, but that one, levered out to flip this bit of Mahogany, would have to be pretty stout in order to make its 45 degrees move the gauge close to 120 degrees. Its 3/8 thick, 1.75 wide, and about a foot long, swinging on a stick of piano hinge about that same length. I had anticipated a small sensor, not a drawbridge. Are you sure that a chain and windlass wouldn't be more appropriate? :-) Don't bite down too hard Andy, bitten tongues out in cheeks are slow to heal. ;-) Its that stout because it also has to withstand me putting the end of a 4 foot piece of Mahogany 1x12 against it, and a glued on gauge block on the left to precisely locate the board for machining. The touch off gauge, a 3 contact point brass concoction I soldered up a year ago, is screwed glued to the top face when in gauging position. Currently I am attaching the probe wire to it by hand each time also, which is yet another point of failure I intend to do away with by making it a permanent connection for the duration that the main jig, about 15 lbs of white ash maple, is secured to the table. 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 -- ___ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
Re: [Emc-developers] Got an almost show stopper buglet in the most recent 2.8.0-pre
On Monday 10 August 2015 16:26:18 Gene Heskett wrote: To be specific, G92.1 is not clearing #5061, the g54 X offset. Possibly not clearing #5062 or #5063, all of which I use to calibrate the machine I can code around it as there's nothing to stop me from putting a line in the earlier code to clear it. It works from the MDI interface. #5061 = 0.000 And it works in the gcode too. Except that doesn't stop the positioning error. I go to the MDI and enter G1 F5 X0.331, and it runs to nominally -0.887, a bit over an inch from where it should be going. This is immediately after a G92.1. I think I could use a clue. We have OOT company we're supposed to meet for dinner shortly, so it will be a bit before I get back to a keyboard. Thanks all. The symptoms are a continuously growing X offset in where it goes when the program, assuming its at zero, tells it to move to 0.337 preparatory to executing a G38.2 to find the jig contact, which it should find by 0.425, the #5061 thereby recorded then being moved to the G54 co-ordinate system. Instead it was running to a - value about 3/4 away, and every iteration of the program made the error larger. Cheers, Gene Heskett 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 -- ___ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
Re: [Emc-developers] Got an almost show stopper buglet in the most recent 2.8.0-pre
On Monday 10 August 2015 18:15:42 andy pugh wrote: On 10 August 2015 at 21:26, Gene Heskett ghesk...@wdtv.com wrote: To be specific, G92.1 is not clearing #5061, the g54 X offset. Possibly not clearing #5062 or #5063, all of which I use to calibrate the machine Why do you think that it should? The Docs say: G92.1 - reset axis offsets to zero and set parameters 5211 - 5219 to zero. And I can't read. Duh. G92.2 - reset axis offsets to zero. This is 'touch offs' only? If you want to reset G54 to Zero the code is: G10 L2 P1 X0 Y0 Z0 I'll do that, after homing it all, then relocate my jog doohicky so I can drive close to it, then find it with the G38.2's. That repeatability is the general idea of all this. Thanks Andy. Again, from the docs: G10 L2 P- axes R- P - coordinate system (0-9) R - rotation about the Z axis G10 L2 offsets the origin of the axes in the coordinate system specified to the value of the axis word. The offset is from the machine origin established during homing. The offset value will replace any current offsets in effect for the coordinate system specified. Axis words not used will not be changed. Program P0 to P9 to specify which coordinate system to change. 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 -- ___ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
Re: [Emc-developers] Got an almost show stopper buglet in the most recent 2.8.0-pre
On Monday 10 August 2015 19:52:51 andy pugh wrote: On 11 August 2015 at 00:10, Gene Heskett ghesk...@wdtv.com wrote: G92.2 - reset axis offsets to zero. This is 'touch offs' only? No, it is _only_ the G92 offset. (Which you might well not be using) I think I see. The previous msg was the magic spell though, and I now have that 20 lines of code doing as it is supposed to. And I have relocated the x offset from the jig, to the left edge of the guage blocks on the jig, but haven't recalibrated the Y offset just yet. Thats tomorrows project, while I am mulling whether or not I make the jig, either air driven to bring it in or out, or, if I can figure out how to drive a cdroms tray motor to flip it down or up electrically. So I'm going to go rooting around in the fleabay midden heap for a suitable 12 volt air valve and a mini air cylinder. I have 80 or so psi in the garage, so a 1/4 double action cylinder, with a 12 volt driven spool valve seems like the simplest way to automate it. Thank you 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 -- ___ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
