Round system parameter to tenths?

If I have:

G28.1
(debug , X is #5161)

It will display the result as 5.123456

How can I format it to 5.1234? Also, how can I pull just the integer and modulus?

In 2.9 you can use formatting:
linuxcnc.org/docs/2.9/html/gcode/overvie...e:comment-parameters

Excellent, but I'm not on 2.9 sadly.

Hello.
I have the same question.
After probing i have the Z coordinate value.
I measuring 2 points to align the B axis.
I'm doing it 2 times.
The 2nd measuring if gives a result with equal 2 decimals don't rotate the B axis.
Is there a code for the g-code to get a result in parameter, like in the debug
%.xf = x (0-9) number of decimals?

andypugh wrote:

But if you just want to compare two numbers to see if they differ by less than a certain amount:

O100 IF [ ABS[#100 - #101] LT 0.01]
  <do stuff>
O100 ENDIF


https://linuxcnc.org/docs/html/gcode/overview.html#gcode:functions
https://linuxcnc.org/docs/stable/html/gcode/o-code.html#ocode:conditional
 

Thank you.
I saw that documents, but  I'm not realized it can be done so simple way...

I figured out how to make it work the axis alignment
But on 2.8.4 LCNC my code hangs out the LCNC when i uncomment the:
O100 do
O100 while [#_<ValueABS> GT 0.007]
The whole code in the attachment.

I want to combine 3 measurings in one file (also in attachment), but the same result - The LCNC freezes out without errors.

The decimal test code works fine
Maybe the global parameters makes the issue?
Can anyone tell how to solve this?

andypugh wrote:

The trick here is probably

O100 while [#<_task> EQ 1.0 AND #<_deltaabs> GT 0.007]

 

Thank you! It's HELPED!!