o codes

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10 Apr 2016 20:21 #73075 by norbertfarquharsh
o codes was created by norbertfarquharsh
Hello,

Trying a first program with subroutines and looping and conditional statements.
Persistent error is "Unknown control command in o word."

I have tried whatever I could think of with no success. It is pointing to the subroutine call, I believe,
but am not certain after various commenting out and changing lines.

I would appreciate and help on the listing below.

%
G17 G20 G40 G49 G54 G80 G90 G94
#35=2.1250
#38=27.4000
/o100 DO
o101 WHILE [#35 LT 7.6250]
#36=[-SQRT[33.0625-[#35]*[#35]]]
G0 X[#35] Z[#36]
G0 Y[#38]
#35=[#35 + 0.5000]
o110 SUB
o111 IF[#38 GT 25]
o111 #38 = 0
o111 ELSEIF [#38 EQ 0]
o111 #38 = 27.4000
o111 ENDIF
o110 ENDSUB
o110 CALL
/o100 WHILE [#35 LT 7.6250]
o101 ENDWHILE
M2

%

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10 Apr 2016 20:49 #73078 by BigJohnT
Replied by BigJohnT on topic o codes
Right off the bat you don't need % and M2, M2 is preferred.
You only put o100 before the if, elseif, and endif. It also looks like an endless loop with the o110 call. I don't think you can have a sub inside a while loop.
o100 sub
G53 G0 X0 Y0 Z0 (rapid move to machine home)
o100 endsub
; notice the call is outside the loop
o100 call (call the subroutine here)
M2

JT

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11 Apr 2016 13:01 #73099 by norbertfarquharsh
Replied by norbertfarquharsh on topic o codes
To JT from another JT.

But my JT name is a Joe with a last name that is so common that I can never use any part of it as it is already used. So I use the user name that I came up with and it has always worked. But I cannot make my program work.

Thank you very much for your reply. I cleaned up as you suggested and also determined that it did not seem to require the
subroutine so I removed that whole call. However, it is still throwing that same error: Unknown control command in o word. The error statement points to the line with the ELSEIF command. Again I have tried different edits to try to figure it out but it is beyond me. Maybe I do not understand what is allowed within a loop as you mention.
I will paste a new copy of the code below.
And thanks again for your comments and help.
JT

G17 G20 G40 G49 G54 G80 G90 G94
#35=2.1250
#38=27.4000
o100 DO
#36=[-SQRT[33.0625-[#35]*[#35]]]
G0 X[#35] Z[#36]
G0 Y[#38]
#35=[#35 + 0.5000]
o111 IF [#38 GT 25]
o111 #38 = 0
o111 ELSEIF [#38 LT 5]
o111 #38 = 27.4000
o111 ELSE
o111 GO TO 999
o111 ENDIF
o100 WHILE [#35 LT 7.6250]
N999 M2

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11 Apr 2016 13:16 #73101 by BigJohnT
Replied by BigJohnT on topic o codes
The o111 only goes with if, elseif, else, and endif.
o100 if x eq 2
some G code
more G code
even more G code
o100 endif

Take a look at the examples in the manual.

JT

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11 Apr 2016 16:07 #73121 by norbertfarquharsh
Replied by norbertfarquharsh on topic o codes
JT

Thanks again for your reply and assistance. And, yes, I should look at the examples and understand all that it is saying and once I did what you told me, it worked. I look at the examples and do not pick up all that they are saying as it is not explicit enough for a goof like me.
It still does not work as now there are other problems but I am not going to ask about them at this point as they are no doubt other mistakes that I cannot see and I will try to work them out.
Thanks for your patience.

JT

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12 Apr 2016 13:27 #73164 by norbertfarquharsh
Replied by norbertfarquharsh on topic o codes
JT

Thanks again for your help and patience.
I feel so stupid as I just cannot get this stuff. I built this machine to learn G code and have written some programs but each time I write one, I try to learn some new subject(s), but this has been the worst so far. I am going to paste on the latest revision and ask a few questions.

Using this program, the X and Y axes perform as the program directs them. The Z axis is supposed to move in calculated proportion to the movement of the X axis. The Z axis does not move and that is main problem. But there have been and still are other problems in reaching this point.
See comments below,

Thanks again.
JT


G0 X2.1250
#31 = 0.0500
#38 = 27.4000
o100 DO
#31 = [#31 + 0.05000]
G0 X[#31 + 2.1250]
#44 = [#5420**2] These lines containing #44 through #48 were written to perform the same function as the commented out
#45 = [33.0625 - #44] line below with the added function of trying to negate the value as the Z axis movement is required to
#46 = [SQRT [#46]] be negative. This proves to me that I am doing something incorrectly in the line below but I cannot see it.
#48 = -1] * [#46
G0 Z[#48]
/G0 Z[SQRT[33.0625-[#5420**2]]] This line is commented out as it throws errors saying it is feeding a negative value to the SQRT
G0 Y[#38]
o111 IF [#38 GT 25]
#38 = 0
o111 ELSEIF [#38 LT 5]
#38 = 27.4000
o111 ELSE
GO TO 999
o111 ENDIF
o100 WHILE [#5420 LT 7.6250]
N999 M2

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12 Apr 2016 13:53 #73165 by BigJohnT
Replied by BigJohnT on topic o codes
#48 the brackets are backward. No need for N numbers.

Use the debug function to see what the value of a variable. Break down each item and check the variable value as you go along.
#50 = [SQRT[33.0625-[#5420**2]]]
(debug,#50)
M2

JT

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13 Apr 2016 04:47 #73212 by Rick G
Replied by Rick G on topic o codes
Normally to comment out a line you would use a; or ( )
linuxcnc.org/docs/html/gcode/overview.html#gcode:comments

A / is optional block delete...

2.1. Block Delete
The optional block delete character the slash / when placed first on a line can be used by some user interfaces to skip lines of code when needed. In Axis the key combination Alt-m-/ toggles block delete on and off. When block delete is on any lines starting with the slash / are skipped.

linuxcnc.org/docs/html/gcode/overview.html

Rick G

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13 Apr 2016 20:32 #73247 by norbertfarquharsh
Replied by norbertfarquharsh on topic o codes
Thank you both for your comments. Slowly making progress with help and reading the manual.

Joe

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