Re:Dahlgren Engraver Z axis air actuation

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08 Mar 2011 20:14 #7658 by BigJohnT
I would think that Spindle ON would get you where you need to be.

John

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09 Mar 2011 03:41 #7661 by bvandiepenbos
yes it works.
but the relay makes a buzzing sound???

~Brian VanDiepenbos

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09 Mar 2011 10:46 #7665 by Rick G
Which relay? One or both?
Like a 60 cycle hum?
Is power supply strong, clean enough?

In show Hal configuration

under pins

is motion.spindle-on connected to par port pin 14?

On the bright side you are almost there...

Rick G

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09 Mar 2011 15:04 - 09 Mar 2011 15:04 #7670 by BigJohnT
So in the MDI window you do

S1 M3

relay buzzes

M5

buzzing stops

?

or in the Show Hal Configuration you can an unlink pin with unlinkp then set pin with setp to control the paraport pins directly.

www.linuxcnc.org/docview/html/hal_basic_hal.html#r1_1_6

Also, is your parallel port 5v or 3.3v?

John
Last edit: 09 Mar 2011 15:04 by BigJohnT.

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11 Mar 2011 03:05 #7715 by bvandiepenbos
just relay #2
yes, I guess about a 60 cycle hum
power supply is a 5v wall wart, it powers both relays
I think the 5v supply is fine (rated 5v 700ma, but measures 5.6v actual)
this is hal config...
Owner 6 Type bit Dir OUT Value FALSE Name motion.spindle-on ==> spindle-on

~*Brian

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11 Mar 2011 11:01 #7723 by Rick G
If you exchange the output pins to the two relays does the problem follow the parallel port pins to the other relay or does the same relay buzz when on the other signal?
If a power supply problem would expect both relays to be a problem, if so a cap on the power supply may help.

You may also want to look at the parallel port tester...

www.linuxcnc.org/component/option,com_ku...d,4743/lang,english/

Rick G

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11 Mar 2011 11:59 #7726 by andypugh
The buzzing might be from the wall-wart, they are often not the most stable or well regulated supplies.

Do you have any other power supplies you could test with? (Black and Red on a spare hard drive power plug in the PC, for example)

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11 Mar 2011 21:23 #7736 by bvandiepenbos
Rick,
Good idea.
I will try switching pins and see what happens.
thanks
~*Brian

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11 Mar 2011 21:27 #7737 by bvandiepenbos
Andy,
Thanks for the idea, it did not occur to me to get clean 5v that way.

A spare USB cable would get me good 5v also, right?

I will give it a try.
~*Brian

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11 Mar 2011 23:15 #7740 by Rick G
Not sure how much power you need for the relays but the usb is limited.
But of course find the location of the problem with testing.

Rick G

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