axis.n.in-position does not work in mdi/auto

hi,

i modified my controller so that now it has an input which is used to decreasese torque and decay when the axis is idle.

i used the axis.n.in-position which worked like a charm when jogging manually. however it doesn't when you issue an mdi or run gcode

is it supposed to be like this?

is there any way i can get a pin to change state when a specific axis is moving?

You could use axis.n.joint-vel-cmd
When axis.n.joint-vel-cmd = 0 reduce power.

Rick G

but that is a floating point variable. i can just connect that to a physical pin? or is there some other way to make a pin change when that value ia not zero?

sorry im a total noob on emc2 and linux

No, you will have to use a component that compares the floating value against 0 and returns a yes or no value and use that pin to control your driver.
I used that on one of my machines for parked, regular and high speed values.
If you like I can send youa copy tomorrow.

Rick G

Takea look here...

wiki.linuxcnc.org/emcinfo.pl?HAL_Components

Rick G

and here...

linuxcnc.org/docs/html/hal_components.html

Rick G

this is rather complicated for my level. i assume i have to use the match8 component?

thanks i will try it tonight once i get home. so i should do something like:

loadrt near count=3
addf near.0 base-thread
...same for 1 and 2
(sice i need this to be fast i would add it to the base thread...)

net axis.0.joint-vel-cmd near.0.in1
(since i want near.0.in2 to be 0 i could just ignore it?)

net parport.... <= near.0.out