Topics

51

General Mach Discussion / More Rotary confusion

« on: January 05, 2006, 06:15:08 PM »

Okay,so,I'm ready to cut my cone.I first tested my rotary table for motor tuning and with everyone's help,with a G01 A15 my rotary goes to 15 degrees as promised.Now with the addition of the suggestions of Brian and some particular details for what I desire I modify this code and yes indeed,as I 'cut air',I see that cone a formin' BUT.......screech! It seems with the G91 incremental code stuck in there with each line progressing .5 ,my rotary does not go to half a degree but more like a quarter degree! Checked and rechecked motor tuning,did the G01 move again and that worked to position to the degree I entered.What up?-Keith

52

General Mach Discussion / S command?

« on: January 05, 2006, 02:13:39 PM »

Hi the 'S' G-code  comes up in an imported .dxf that I'm about to edit for my purpose.Does this denote:'spindle'(it's followed by '1000')?Can't find it's reference in Mach2.Thanks ,Keith

53

General Mach Discussion / Milling a cone

« on: December 22, 2005, 12:51:01 PM »

Hi,well now that I have my rotary axis 'pointing' where I want it,when I want it,I wonder if someone could 'shortcut' me to the 'accepted' way of milling a cone.My thoughts are to go crazy incrementally listing z cuts per 'x step' and a 360 turn per cut which seems to scream :"wrong" or do an interpolation of the 'z' and 'x' and have some ratio of 'z,x feed' to a-axis feed;which seems closer but being new to g-code,I'm not sure how to enforce the different feedrates to accomplish this within the code's lines.Just mssing the protocol of not changing one axis feedrate when enlisting a feedrate for another axis.Reminds me of first time head scratching for doing 'nested "if...then" statements in microcontroller coding.-Thanks,Keith

54

General Mach Discussion / Quantifying A-axis rotary

« on: December 15, 2005, 06:18:26 PM »

Hi,I'm just getting my feet wet with my 4th axis,rotary table.I did a 'g1' a(value).I just put in 360 as the value not thinking anything about degrees,just as a starting point.Did the move.My question is, 'in finding a value for where you want to wind up',is this value strictly an 'inch per minute' number? ...and if I calculate the proper ratio for the worm gear to 'pulses per',will this put me where I want on some point ,on some circumference?
Thanks,Keith