Macro. Strange returned values in the loop

[annocka99]

Basic Information:

Printer Model: kp3s
MCU / Printerboard: kp3s
klippy.log (6.2 MB)

When i request values from status reference object in the loop it always returned the same value even if the value was changed.
That is the simple example of the issue.

[gcode_macro test2]
gcode:
M140 S40
{% for i in range (10) %}
RESPOND TYPE=echo MSG=‘{printer.heater_bed.temperature}’
G4 P2000 # Wait for one second
{% endfor %}
M140 S0

[Sineos]

See

Help with Macro: SET_GCODE_VARIABLE doesnt set my variable

That’s because macros are evaluated before they are run. All the variables are “translated” before the macro is executed so if the macro itself changes the value of a variable, that change won’t be reflected during the same execution of the macro. To work around this, create a second macro called something like TEST_RESPOND, have that macro do the RESPOND TYPE=error MSG=‘{test}’ line, and call TEST_RESPOND at the end of TEST. Keep in mind that TEST_RESPOND will need to lookup the value of the te…

and following posts for an explanation.