I will have to dig up my documentation…. By the way, I haven’t ever seen this happen before using this code from Fusion. Other code, or course, wouldnt lilely have 2 back-to-back G96 commands, but this seems to be related to the fact that spindle is in some state of CSS, gets commanded again to do CSS and now has new commanded parameters, and that confuses something - software or electrons ;-)
-Tom > On Jul 25, 2019, at 1:56 PM, John Dammeyer <jo...@autoartisans.com> wrote: > > Since I'm just getting into setting up spindle control I'm interested in this > subject. Can you tell us how you are actually electrically controlling your > spindle? The problem you are having at first glance appears more electrical > than software. > > Can you put a scope on the control signals to the spindle control? That > would tell you if LinuxCNC is doing something to the I/O lines that causes > the change in direction. > > John > >> -----Original Message----- >> From: tom-...@bgp.nu [mailto:tom-...@bgp.nu] >> Sent: July-25-19 9:34 AM >> To: Enhanced Machine Controller (EMC) >> Subject: [Emc-users] Reverse/stop spindle for no reason >> >> Is there a standard or convention on which way M3 and M4 spins a lathe >> spindle? Is the direction (CW/CCW) viewed from looking at the spindle face >> or out FROM the spindle? Does it change depending on where the tools >> are? I think I may have our lathe set up to spin opposite of convention but >> now I am not sure what that convention (standard?) is... >> >> But the real issue I am sending this email about is I have some gcode that >> Fusion 360 generated and a strange thing is happening with it on my Emco >> lathe running 2.7.14. >> >> What is happening is that after the PROFILE1 section runs, the spindle will >> sometimes change direction when going to do the CHAMFER2 section of >> code. I say sometime because I ran 6 or so of these parts and it ran fine, >> then suddenly it decided to change directions. I have also had the spindle >> stop entirely at this point. But Linuxcnc clearly thought it was still >> spinning >> and was going to happily jam the tool in there. The stopping has only >> happened once or twice in the 40 or so times I have run the program. The >> spinning in the opposite direction happens more frequently, maybe 4 times >> in 40 runs or so. >> >> The spindle codes are the same in both PROFILE1 and CHAMFER2 sections: >> G96 D3000 S500 M03. If I remove the G96 D3000 S500 M03 from the >> CHAMFER2 section of code I believe the problem goes away. I still need to >> run more to verify that but I am pretty sure that�s the case. >> >> Any ideas on what might be happening or how to debug it? I can of course >> just leave out the second G96 D3000 S500 M03 assuming that prevents it >> from happening, but I�d like to post-n-go as it were with Fusion code rather >> than have to bandaid. >> >> The gcode file is: >> >> >> % >> (PROGRAM NAME--SA232) >> (PROGRAM COMMENT--SA-232_PLUG) >> (NOTE--OVERRIDING TOOL SPINDLE DIRECTION FOR TOOLS T1, T3, T5, AND >> T7) >> (POST--EMCOTURN 120P BASED ON GENERIC TORMACH TURNING) >> M70 (save modal state, restore at end) >> G7 >> G18 >> G90 >> G20 >> (GENERATED--THU JUL 25 160944 2019) >> (USERNAME--TOM) >> (FILE NAME--SA-232_LCH-1250-18 V12) >> (JOB--SETUP2) >> >> (FACE1) >> G53 G0 X0 >> G53 G0 Z0 >> M6 T0005 G43 H0005 >> G54 >> G96 D3000 S300 M03 >> G94 >> G90 G0 X1.5 Z0.1969 >> G0 Z0.0516 >> X1.4 >> G1 X1.1131 F10. >> X1. Z-0.005 >> X-0.0312 F5. >> X0.0819 Z0.0516 F20. >> G0 X1.5 >> Z0.1969 >> M05 >> M09 >> >> (PROFILE1) >> G96 D3000 S500 M03 >> G94 >> G0 X1.5 Z0.1969 >> Z0.0566 >> X1.0929 >> G1 X1.0531 F20. >> X0.94 Z0. F10. >> Z-0.4156 >> X1. >> X1.16 F20. >> G0 Z0.0566 >> X0.9931 >> G1 X0.88 Z0. F10. >> Z-0.4156 >> X0.94 >> X1.0531 Z-0.3591 F20. >> G0 Z0.0566 >> X0.9331 >> G1 X0.82 Z0. F10. >> Z-0.295 >> X0.845 Z-0.3075 >> G18 G3 X0.86 Z-0.3256 R0.0256 >> G1 Z-0.4156 >> X0.88 >> X0.9931 Z-0.3591 F20. >> G0 Z0.0566 >> X0.9005 >> G1 X0.7873 Z0. F10. >> Z-0.2787 >> X0.845 Z-0.3075 >> G3 X0.85 Z-0.3104 R0.0256 >> G1 X0.9631 Z-0.2538 F20. >> G0 Z0.0566 >> X0.8682 >> G1 X0.8678 F20. >> X0.7547 Z0. F10. >> G3 X0.7653 Z-0.0156 R0.0256 >> G1 Z-0.2677 >> X0.8173 Z-0.2937 >> X0.9305 Z-0.2371 F20. >> G0 Z0.0566 >> X0.8394 >> G1 X0.8273 F20. >> X0.7141 Z0. F10. >> G3 X0.7453 Z-0.0156 R0.0156 >> G1 Z-0.2718 >> X0.8308 Z-0.3146 >> G3 X0.84 Z-0.3256 R0.0156 >> G1 Z-0.4156 >> X0.9531 Z-0.3591 F20. >> X1. >> G0 X1.5 >> Z0.1969 >> M05 >> M09 >> >> (CHAMFER2) >> G96 D3000 S500 M03 >> G94 >> G0 Z0.1969 >> X1.5 >> Z0.0283 >> G1 X0.5996 F10. >> Z0.0237 >> X0.7927 Z-0.0729 >> G0 X1.5 >> Z0.1969 >> M05 >> M09 >> >> (THREAD1) >> M01 >> G53 G0 X0 >> G53 G0 Z0 >> M6 T0003 G43 H0003 >> M08 >> G97 S280 M04 >> G95 >> G0 X1.5 Z0.1969 >> G0 Z0.1406 >> G17 >> G76 P0.0625 Z-0.24 I-0.7547 J0.0328 K0.0868 R2. Q30. H1 >> G0 X1.5 Z0.1969 >> M05 >> M09 >> >> (PART1) >> M01 >> G53 G0 X0 >> G53 G0 Z0 >> M6 T0007 G43 H0007 >> M09 >> G96 D3000 S150 M03 >> G94 >> G0 X1.5 Z0.1969 >> G0 Z-0.4587 >> G1 X-0.016 F0.75 >> X1.5 >> G0 Z0.1969 >> M05 >> M09 >> >> M72 (restore modal state, was saved via M70 at start) >> M30 >> % >> >> >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
