fixed it, modified post file as .txt file, told it to not do any feedrate calculations for rotary table. works for this sittuation but would need calculations for complex shapes where tool is travelingin towards and away from 0 on xy plane. i think this is the code that calculates feed for rotary. pfclc_deg_inv #Feedrate deg/min circum = zabs * two * pi$ if cuttype = two & rot_on_x = three, circum = sqrt(xabs^2 + yabs^2) * two * pi$ if circum = zero, circum = c9k #Don't allow Zero ldelta = sqrt((xabs-prv_xabs)^2+(yabs-prv_yabs)^2+(zabs-prv_zabs)^2) cdelta = ((abs(cabs - prvcabs))/360)*circum if ldelta = zero, cldelta = cdelta else, cldelta = sqrt(cdelta^two + ldelta^two) if cldelta = zero, cldelta = c9k if use_frinv,

could be this, found it in post file #Rotary/Index variables csav : 0 #C saved value prvcabs : 0 #Saved cabs from pe_inc_calc, #Used for rotary feed and direction calculations cdelta : 0 #Calculation for angle change rev : 0 #Calculation for deg/min sav_rev : 0 #Saved revolution counter indx_out : c9k #Rotation direction calculation fmt 16 indx_mc #Rotation direction calculation anybody anyidea what c9k, prvcabs, 16 indx_mc, would do ?

MasterCam_MACH3B.pst from the MACH3 website. i am not using the "user created" one for mastercam. maybe i have to go into the textfile to make changes to the way mastercam posts. changes through the GUI seem to not stick correctly, feed in post only changes when i adjust tool feed in toolpath properties window. always by x 9.836 I will try diff. posts with rotary axis,

tried generating code with each of those settings, the dialouge box gives me three choices, deg/min/ f/min or inverse. also tried the three 4th axis options, and three rotary table options, and changing inverse options, and maximum rotary table feed in machine control,,, still same magic number 9.836. no matter what i change. my work around is to divide my desired feed by 9.836 and put that number in the feed box, all other feeds for other axis ok. -

rotary table feed rate multiplies tool feed by 9.836 ? if set feed of tool in operations manager to 10 in per minute, when i generate gcode the rotary table rotates at F90.83 in/per min? if i set to 2 in per minute, gcode output of rotary table is twice 9.836? all other feeds and speeds , plunge ect are correct, only rotate table is wrong. i tried changeing settings in machine definition manager, controll definition manager, ect, but no change. diamiter of circylar part i am trying to cut is 11 inches. .25 flat endmill,,,,

Problem Solved! I had to go into system settings into tool and change system tolerance to .00005 then go into settings in the tool-path editor and change tool tolerance to .00005 long delays generating tool-paths happened when trying to change tool tolerance without first changing system tolerance. code looks great. Thank you for pointing me in the right direction. much appreciated. now all i have to do is output arcs correctly, and get feeds and speeds for rotary table correct. -

tried higher tool tolerance but it didn't change anything. now set to .0001 i made a simple mastercam file with a circle extrusion, done in mastercam, and gcode output has the same wandering X axis. the g-code looks like this, notice the x axis position moveing back and forth even though shape is straight circle extrusion on a axis rotate table. (DATE - DEC-31-10) (TIME - 14:48) (POST DEV - NovaLab) (NWDTOOL N" 5/16 FLAT ENDMILL" T236 D.3125 F.75 L2.5 CD2. CL1. SD2. C0) (NWDSTOCK X10.6 Y1.25 Z0. OTC OX0. OY0. OZ0.) N10 G00 G17 G20 G40 G49 G80 G90 N20 T236 M06 ( 5/16 FLAT ENDMILL) N30 (TOOLPATH - ROUGHCTOUR) N40 (STOCK LEFT ON DRIVE SURFS = .05) N50 G00 Z1.39 N60 G00 X5.0857 Y0. A-134.968 S1711 M03 N70 G01 Z1.29 F6.37 N80 X5.0858 A-136.528 F71.72 N90 X5.0859 A-138.098 N100 X5.0858 A-139.666 N110 X5.0853 A-140.486 N120 X5.0857 A-141.307 N130 A-141.45 N140 X5.0859 A-143.019 N150 A-144.592 N160 X5.0857 A-146.168 N170 A-146.242 N180 A-147.658 N190 A-147.801 N200 X5.0859 A-149.371 N210 A-150.939 N220 X5.0853 A-151.759 N230 X5.0858 A-152.58 N240 X5.0853 A-153.436 N250 X5.0858 A-154.292 N260 X5.0859 A-155.865 N270 X5.0858 A-157.441 N280 X5.0857 A-157.515 N290 A-158.931 N300 X5.0856 A-159.075 N310 X5.0858 A-160.644 N320 X5.0859 A-162.212 N330 X5.0858 A-163.78 N340 A-163.853 N350 X5.0857 A-165.422 N360 A-165.565 N370 X5.0858 A-167.138 N380 A-168.715 N390 A-170.204 N400 X5.0857 A-171.774 N410 X5.0858 A-171.918 N420 X5.0859 A-173.485 N430 X5.0858 A-175.053 N440 A-175.127 N450 A-176.695 N460 X5.0852 A-177.553 N470 X5.0858 A-178.412 N480 A-179.988 N490 A-181.478 N500 A-183.047 N510 X5.0857 A-183.191 N520 X5.0859 A-184.759 N530 A-186.326 N540 X5.0853 A-187.147 N550 X5.0858 A-187.968 N560 X5.0857 A-189.541 N570 A-189.685 N580 X5.0858 A-191.261 N590 A-192.677 N600 A-192.751 N610 A-194.321 N620 X5.0852 A-195.176 N630 X5.0858 A-196.032 N640 X5.0859 A-197.6 N650 X5.0853 A-198.42 N660 X5.0858 A-199.241 N670 A-200.815 N680 X5.0857 A-200.958 N690 X5.0858 A-202.535 N700 A-203.951 N710 X5.0853 A-204.772 N720 X5.0858 A-205.594 N730 A-207.162 N740 X5.0857 A-207.305 N750 X5.0859 A-208.873 N760 X5.0858 A-210.441 N770 A-210.515 N780 A-212.088 N790 X5.0857 A-213.664

thanks for reply. yes tolerance was a place i looked. tolerance is .001 i tried changing it to .0001, but then generating the simplest toolpath took forever, gave up after 10 min of a simple contor. do you think that would fix the problem? i will try again, set it up and then go out to lunch while all the toolpaths re-generate to new tolerance. -

I have an 11inch diameter circular disc shaped part made in Autodesk inventor. contour around edge is smooth and even no ellipse or a-symmetrical surfaces. part is on my rotary table set up to rotates around the z axis. I figured out how to post for my tormach mach3 system. everything runs well and looks good. however, end mill goes to correct z depth and x distance from center of disc, but when A axis rotates the X axis wanders between X 5.9450 - - to - - X 5.9459 - ? this is written into the gcode, not a tormach malfunction. based on my 3d file X axis should stay the same position per one rotation of a axis to make the smooth contour. I have no idea why it would do this, almost looks like it is drawing polygons off a low res circle, but files come straight from inventor as a circle extrusion, even tried .step file and code still looks the same. any clues greatly appreciated.