Changing signs using variables

[cogsman1]

Try
#6=ABS[#527-.12]

[stevo1]

Originally Posted by JMECKES When trying to change the sign of a variable from positive to negative, we seem to only be able to change it using a two line formula. In the example below, we are trying to change variable #527 to a negative value.

Cogsman,
He is trying to make it a negative number not a positive number. The ABS would change a negative to a positive.

He is using #6=[0-#527]-0.12 to get his calculation. The 0 can be removed #6=[-#527]-.12 but all and all it works and it works in one line of code.

Stevo

[Andre' B]

This should work.

#6=[-#6]

Or if you want to do it at run time and/or with more then one variable.

(TOP OF PROGRAM)
#19=[-1](SET TO 1 OR -1 AS NEEDED)
.
.
.
.
#6=[#6*#19]
.
.
#100=[#100*#19]
.
.

[stevo1]

Originally Posted by JMECKES In the example below, we are trying to change variable #527 to a negative value. I would like to do it on one line,

using more then 1 variable won't work for what he wants.

Originally Posted by stevo1 I guess you didn’t need all of that but anyway if you want #527 set to a negative value program #527=[-#527]

Originally Posted by JMECKES We ended up using Kiwi's formula, but both that one and Chattaman worked for what we needed. Thanks all!

Stevo

[cogsman1]

Sorry, I should have read more slowly.

This will give you the negative value.

#6=[[#527-[#527*2]]-0.12]

[jamesweed]

#6=#6*[-1]
This will change #6 to it's opposite. If #6 is positive, it will become negitive, negitive will be positive. I have several subs that use this logic.

[g-codeguy]

You said

Originally Posted by JMECKES The program is variable loaded so I was trying to simplify and reduce program size. By keeping the sign change on one line of code instead of two, we are able to greatly reduce the size of the program.

AND

Originally Posted by JMECKES We are using it to control the depth of a drill at the end of a peck cycle. That's where the - comes in. The positive values used for the sub were no problem for the calculation.

I'm lost. How does eliminating one block for the drill cycle "greatly reduce the size of the program"?

Also since it is a loaded variable, why don't you just load it as a negative number?

EDIT: Okay, I can see why you are loading it as a positive number if #527 is being used on the main and subspindle (how often does that happen that the same value is needed?). Still from your posts it seems like you are only adding one block. You must be making the change a lot more than once.