rotary table feed rate multiplies tool feed by 9.836 ?

[alvaroguillen]

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,,,,

[Greg Williams]

Is the feed in F/min, Degrees/min or time?

[alvaroguillen]

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.

 

-

[Greg Williams]

What post are you using?

[alvaroguillen]

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,

[alvaroguillen]

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 ?

[alvaroguillen]

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,