Timer and one shot
02 May 2014 02:52 #46525
by viski
Timer and one shot was created by viski
What i need to do is run timer when machine ON enabled and every 2 minutes output an short signal .
How to do that without any feedback.
This is to activate pnevmatic ventil ( open ) and bearings in spindle gets a oil under preasure and X ,Z table.
How to do that without any feedback.
This is to activate pnevmatic ventil ( open ) and bearings in spindle gets a oil under preasure and X ,Z table.
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02 May 2014 07:56 #46528
by BigJohnT
Replied by BigJohnT on topic Timer and one shot
Classicladder would be my choice for that.
JT
JT
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03 May 2014 02:04 #46544
by viski
Replied by viski on topic Timer and one shot
How to link time-seconds ( s32) to classicladder pin?
If i do this i get error msg: cycle-seconds ( s32) can not link to classicladder.0.in-01 ( bit ) !
net cycle-seconds => classicladder.0.in-01
If i do this i get error msg: cycle-seconds ( s32) can not link to classicladder.0.in-01 ( bit ) !
net cycle-seconds => classicladder.0.in-01
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04 May 2014 05:36 #46564
by BigJohnT
Replied by BigJohnT on topic Timer and one shot
As you have discovered you can't connect a s32 pin to a bit pin. You can connect a s32 to a s32.
www.linuxcnc.org/docs/html/ladder/classi...sic_ladder_variables
On a tablet so must be brief.
JT
www.linuxcnc.org/docs/html/ladder/classi...sic_ladder_variables
On a tablet so must be brief.
JT
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04 May 2014 18:14 #46576
by cncbasher
Replied by cncbasher on topic Timer and one shot
why not use timedelay ?
linuxcnc.org/docs/html/man/man9/timedelay.9.html
linuxcnc.org/docs/html/man/man9/timedelay.9.html
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06 May 2014 05:07 #46644
by andypugh
You can do this with a stepgen in velocity mode. (I just tried it).
Are you currently using steppers? if you are then you just need to change the "loadrt stepgen ctrl_type=p,p,p to be p,p,p,v
A velocity of 0.0083 is a step every 2 minutes (at the default scale), you can choose the steplen to suit (probably a very big number, it is in nanoseconds, so 1 second is 1000000000 of them)
Replied by andypugh on topic Timer and one shot
What i need to do is run timer when machine ON enabled and every 2 minutes output an short signal.
You can do this with a stepgen in velocity mode. (I just tried it).
Are you currently using steppers? if you are then you just need to change the "loadrt stepgen ctrl_type=p,p,p to be p,p,p,v
A velocity of 0.0083 is a step every 2 minutes (at the default scale), you can choose the steplen to suit (probably a very big number, it is in nanoseconds, so 1 second is 1000000000 of them)
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