Double End in a While Loop

[ggborgen]

Gentlemen,
Will this example work:
WHILE[#103LE#100DO1
#102=#102-#101
#108=ABS[#102]
#104=[#18*#18]
#105=[#108*#108]
#106=#104-#105
#107=SQRT[#106]
#109=#108/#107
#110=ATAN[#110]
IF[#110GT45.]GOTO20
G1
G3
G3
G3
#103=#103+1.
END1
N20
G1
G3
G3
G3
#103=#103+1.
END1

I would use GOTO Statements but the cutter pauses after every pass.
Thanks

[angelw]

Originally Posted by ggborgen Gentlemen, Will this example work: WHILE[#103LE#100DO1 #102=#102-#101 #108=ABS[#102] #104=[#18*#18] #105=[#108*#108] #106=#104-#105 #107=SQRT[#106] #109=#108/#107 #110=ATAN[#110] IF[#110GT45.]GOTO20 G1 G3 G3 G3 #103=#103+1. END1 N20 G1 G3 G3 G3 #103=#103+1. END1 I would use GOTO Statements but the cutter pauses after every pass. Thanks

No. DO n and End n must correspond to each in one program.

Something like the following may help you
#1=0 (Control Flag - initialize before starting DO Loop)
WHILE[#103LE#100]DO1
#102=#102-#101
#108=ABS[#102]
#104=[#18*#18]
#105=[#108*#108]
#106=#104-#105
#107=SQRT[#106]
#109=#108/#107
#110=ATAN[#110]
WHILE [[#110 LE 45.] AND [#1=0]] DO2
#1=1 (Set Control Flag so DO2 executes only once)
G1
G3
G3
G3
#103=#103+1.
END2
#1=0 (Reset Control Flag so that DO2 will execute again if #110 LE 45.)
N20
G1
G3
G3
G3
#103=#103+1.
END1


Regards,

Bill

[sinha_nsit]

Read the attachment for correct syntax of ATAN function.

[ggborgen]

Sinha nsit,
Are you telling me there is something wrong with my syntax? Thanks

[sinha_nsit]

This is not correct:
#110=ATAN[#110]

[angelw]

Originally Posted by ggborgen Sinha nsit, Are you telling me there is something wrong with my syntax? Thanks

I think what Sinha is saying is that the result when using the ATAN function correctly is an angle. The function provides the Arctangent of the Opposite side to an angle of a triangle divided by its adjacent side to the same angle. The syntax being as follows:

Arctangent
#i=ATAN[#j]/[#k];
Where:
#1 = the resulting angle
#j = the opposite side
#k = the adjacent side

Now, I've never tried to use the ATAN function in any other way other way than in the above syntax example. Its my understanding that the function requires two arguments, and not just the TAN of an angle. I'll check that out.

In your example program, its not shown where #110 is allocated a value; obviously somewhere prior to the WHILE statement.

Lets say #110 was allocated the TAN of an angle elsewhere, and that #110 = ATAN[#110] did not result in a syntax error. In your example program, the first time through the loop, #110 would take on the value of the angle extrapolated from getting the Arctangent of the TAN of an angle ; the second time through, the angle #110 would be plugged back in as the TAN of an angle. For example:

#110 = TAN [45] (#110 = 1)
ATAN[#110] (#110 = 45)
ATAN[#110] (#110 = 88.7269)

Regards,

Bill

[ggborgen]

Gentlemen,
My example should be as follows:
#110=ATAN[#109]
Sorry about the mistake, so would this work? Thanks

[sinha_nsit]

No.
Read the syntax given in Angelw's previous post or my attachment in post #3.

[ggborgen]

Gentlemen,
Here's an example from a Fanuc control manual:

#i=ATAN[#j] Arc tangent (one argument)
#i=ATAN[#j]/[#k] Arc tangent (two arguments)
#i=ATAN[#j,#k] Arc tangent (two arguments)

So how does the first example differ from my syntax? Thanks

[angelw]

Originally Posted by ggborgen Gentlemen, Here's an example from a Fanuc control manual: #i=ATAN[#j] Arc tangent (one argument) #i=ATAN[#j]/[#k] Arc tangent (two arguments) #i=ATAN[#j,#k] Arc tangent (two arguments) So how does the first example differ from my syntax? Thanks

As I stated in my Post #6, I've not used the ATAN function using only the one argument (TAN of angle), simple because, and purely by chance, I've always been calculating the TAN of the angle in the same operation. I've not seen it expressed in a one argument format, but clearly, it would be a big advantage to be able to just plug in the TAN value if it were already known. If the Fanuc manual indicates that the single argument is valid, then
#109=#108/#107
#110=ATAN[#109]
would be fine if #108 and #107 are the opposite and adjacent sides respectively.

As you're probably aware, the above could also be written as follows:

#110=ATAN[#108] / [#107]

Regards,

Bill

[sinha_nsit]

Originally Posted by ggborgen Gentlemen, Here's an example from a Fanuc control manual: #i=ATAN[#j] Arc tangent (one argument) #i=ATAN[#j]/[#k] Arc tangent (two arguments) #i=ATAN[#j,#k] Arc tangent (two arguments) So how does the first example differ from my syntax? Thanks

Refer to the original Fanuc manuals. Do not believe on what I say or what others say.
The best way would be to test it on your machine. And please do report back.

There is a good reason why Fanuc defined ARCTAN this way.
tan 45 and tan 225 are both 1. What should be the out put of arctan 1?
Similarly, tan (-45) and tan 135 are both -1. arctan (-1) would be ambiguous.

1/1 and -1/-1 are both equal to 1, but refer to angles in I and III quadrants, respectively.
-1/1 and 1/-1 are both equal to -1, but refer to angles in IV and II quadrants, respectively.

Thus Fanuc's ATAN always gives correct value of angle.
Incidently, this feature is not available in even high-level languages such as Pascal.

[ggborgen]

Gentlemen,
Will this work?

WHILE[#***LE#***]DO1
***
***
G65P****
***
***
END1
Basically make another macro call in side a While loop. Thanks