mill threading with sub' m99 m98 ?

[JEZX]

so ive been writing all my codes out never using subroutines (m99 m98) (mach3)

like this below is how i always do it .... works well but there are better ways im sure
(1/2 THREADER single cut )
M3S3000
M8
G4 P1
G0 X.125 Y0 Z.01
G0Z0
G2 X.125 Y0 Z-.0625 I-.125 J0 F30
G2 X.125 Y0 Z-.125 I-.125 J0 F10
G2 X.125 Y0 Z-.1875 I-.125 J0
G2 X.125 Y0 Z-.25 I-.125 J0
G1 X0Y0
G0Z.1

ive been looking to learn to put the m99 m98 and get it done in a few lines of code
so i saw this on mach3 site which looks like it should work but doesnt for me . i think i just do not get how it doesnt work .

M98 P1 L6
O1
G91
G2 X0.0 Y0.0 I0.5 J0.0 z-0.06 F20.0
M99

i know it would do a completly different thread then first one i posted , but i dont know why i cant get the m99 an m98 to work so no way i can correct it anyway .
mach3 always say '' returned call with no sub in effect ... looping''

if it was in the middle of my list of code and the m98 was line # 50 would the P be 51?? and the O 51 ??
or the O still be 1 for the repeating the lines 1 time .

also wonder if the 91 is needed ??

thanks

[Hood]

Would it not be more sensible to ask on the Mach forum where you would be more likely to get an answer?
http://www.machsupport.com/forum/index.php
Hood

[JEZX]

i thought about that but i figure that's where i got the code i posted on here ( seems to not work but i like the idea) and i couldnt find much else on there , so i hoped for new ideas on a different forum .
guess id better try there anyway .

[Hood]

Lots of smart G Code guys on the Mach forum (of which I am NOT one )and I am sure if you had asked there you would have had an answer within minutes.

See if this works

M98 P1 L6
m30
O1
G91
G2 X0.0 Y0.0 I0.5 J0.0 z-0.06 F20.0
M99
%

Hood

[JEZX]

the m30 was the missing part .makes sence. thanks ... i was probably searching the wrong thing .

now i just need to figure out how to do it away from x0 y0 without getting sidway spirals.

[Hood]

Easy enough, just define your start point in the main programme. In other words if you are in G90 (Absolute mode) and you do the following it will move to X1Y1Z0 before it starts the sub. The sub is in G91 (incremental ) mode so it will start from where it is and move the distance requested.

G90
G0x1y1z0
M98 P1 L6
m30
O1
G91
G2 X0.0 Y0.0 I0.5 J0. z-0.06 F20.0
M99
%

Note that the G90 to the M30 is the main programme and the sub is from the O1 to M99 You could have for example another sub below that which you would call from the main, eg

G90
G0x1y1z0
M98 P1 L6
M98 P2 L6
m30
O1
G91
G2 X0.0 Y0.0 I0.5 J0. z-0.06 F20.0
M99

O2
G91
G3 X0.0 Y0.0 I0.5 J0. z0.06 F20.0
M99
%


As said asking on the Mach forum will get you answers very quickly when they relate to Mach, you should try it sometime
Hood

[Hood]

Also meant to say you really need to call the G90 again before the M30 as you will still be in incremental mode, from the subs, unless you do and it may give you some skid marks

Hood