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SDC2160S for linear motor control using relative optical encoder.

9 years 5 months ago - 9 years 5 months ago #29528478 by psykokwak
SDC2160S for linear motor control using relative optical encoder. was created by psykokwak
Hi all,
I have a linear motor with a relative position feedback using an optical encoder.
Is there a way to force minimal position at startup to initialize the counter ?

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9 years 5 months ago #29528486 by Griffin Baker
Replied by Griffin Baker on topic SDC2160S for linear motor control using relative optical encoder.
Are you trying to set the actuator to retract to the minimum and then set that as the minimum value?

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9 years 5 months ago #29528488 by psykokwak
Replied by psykokwak on topic SDC2160S for linear motor control using relative optical encoder.
I've made a simple script that starts at startup :
print("starting....\r")

setcommand(_G, 1, -1000)' set motor command to minimum position
top:
value = getvalue(_M, 1) ' get motor command
	
if value = -1000 then
setconfig(_MMOD, 1, 0) ' mode open loop
setcommand(_SENCNTR, 1, 0) ' reset counter
else
setconfig(_MMOD, 1, 2) ' mode closed loop relative position
end if

wait(10)

goto top

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9 years 5 months ago #29528489 by Griffin Baker
Replied by Griffin Baker on topic SDC2160S for linear motor control using relative optical encoder.
So I take it that you are looking to see if the controller could did this in a different manner that does not require a script?

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9 years 5 months ago #29528490 by psykokwak
Replied by psykokwak on topic SDC2160S for linear motor control using relative optical encoder.
Yes.
But this script solution works for me!
Maybe it can be improved.

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9 years 5 months ago - 9 years 5 months ago #29528491 by Griffin Baker
Replied by Griffin Baker on topic SDC2160S for linear motor control using relative optical encoder.
The script is the only route currently for what you are looking to do. What are you looking to improve on the script?

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9 years 5 months ago #29528492 by psykokwak
Replied by psykokwak on topic SDC2160S for linear motor control using relative optical encoder.
If I interrupt the move when ask the motor position -1000 (min) I loose the position value.
In my use case it should not be a problem but it's not a proper solution.

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