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Rotating monitor construction *Project finished*
weisshaupt:
--- Quote from: DaOld Man on June 02, 2008, 05:01:03 pm ---You will also need to wire the limit switches to the parallel port (2 more pins).
--- End quote ---
I was kinda assuming that he had the limit switches already done (they cut off the power to the Transistors or whatever) My first program turned on the port and left it on, and I had a hardware solution to do the limits... You can basically do the same thing with my plug in by setting an appropriate timeout -- I assume its much the same with yours..
DaOld Man:
Yes, it's basically the same.
I have a SPDT microswitch to tell when the end of travel is reached. (Two switches actually, one for CW and the other for CCW).
The switch turns off the input to the H drive, and at the same time turns on an input into the parallel printer port.
This effectively "kills" the H Drive, even if the printer output sticks on, but it also allows my program to monitor the rotation. This allows me to do a lot more with the software.
Using the switches in this manner was an idea first mentioned by Koz319. (At least I first heard of it from him.)
Hey, my memory is starting to come back.. The Mexican tequila must be wearing off.. LOL.
Maybe I can give proper credit to others now..
Side note: If anyone is interested in building a rotating monitor, you need to check out how Koz319 did it.
I got the plans to build the H drive from his site.
Also his software is very similar to mine, except mine has the fancy smancy GUI..
Koz319's site:
Koz319
Of course weisshaupt did a bang up job too:
Ghost in the machine
danny_galaga:
--- Quote from: weisshaupt on June 02, 2008, 06:58:22 pm ---
--- Quote from: DaOld Man on June 02, 2008, 05:01:03 pm ---You will also need to wire the limit switches to the parallel port (2 more pins).
--- End quote ---
I was kinda assuming that he had the limit switches already done (they cut off the power to the Transistors or whatever) My first program turned on the port and left it on, and I had a hardware solution to do the limits... You can basically do the same thing with my plug in by setting an appropriate timeout -- I assume its much the same with yours..
--- End quote ---
well, thats exactly what i need! limit switches stop the monitor and reverse polarity of motor for next rotation. i would just need a signal switched on and left on for one direction, then another signal and left on for the other direction. no time outs or anything needed. ill have my cab here by early next month (its in another state). maybe ill get some balls and give it a shot! mala works with win98 i imagine...
DaOld Man:
--- Quote from: danny_galaga link=topic=72750.msg843494#msg843494 ---
well, thats exactly what i need! limit switches stop the monitor and reverse polarity of motor for next rotation. i would just need a signal switched on and left on for one direction, then another signal and left on for the other direction. no time outs or anything needed.
--- End quote ---
Then you may want to check out this thread:
http://forum.arcadecontrols.com/index.php?topic=72380.msg746859#msg746859
danny_galaga:
ah yes. i think i remember reading that thread too. my circuit doesnt need diodes, but it relies on a double pole single throw switch
now i think about it, my circuit is quite simple as is, but to modify that circuit with transistors would be messy. i guess i can use a change over relay in place of the switch which will only need one signal- on/off.
of course, once i get my cab here, i have to make it work again first...
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