Progamming help with FSBus dll

[sgaert]

Hi David,

what is your plan???
You can´t connect 3 Sensors to 1 Connector, how you know which needle is the 0 on the line?

My main Question is, how many steppers you what to use??
1 than you need a synchronous gear, if you have a synchronous gear you only need 1 Sensor on the fastest needle.
3 than you can us from every Stepperboard the sensor connector.

Stefan

[RobiD]

I'll try to explain in detail.

I am using Mike's Flightdeck book on building simulated instruments. I've used all Mikes designs with some modification.

The altimeter is driven by one stepper. The one stepper drives the 3 needles through a series of gears. As the 100 needles goes up past 1000, the 1000 needle shows 1000, just as it would in a real gauge.

Now lets say you have a mid air crash and the gauge has to reset. I you have only 1 interupter, you can't use the hundreds needle or the 1000ths needle. You may be able to use the 10000th's needle but there would be very little movement on it if you were less then 10000 feet. So the ideal would be that the stepper rotates to the left until the zero point is reached when all 3 needles are back in the zero point.

Does that make any sense.

I can explain it perfectly in my head, just hard to get it down in print.

David

[sgaert]

ok, with 1 connector you have only 1 signal. How you whant deside that all, 2 or 1 needle generate the signal???
In your case i dont would use the input on the Stepperboard. I would use the IO Board with 3 inputs.

[RobiD]

Can you give me an idea of how that would look, or a link to the type of IO board you mean.

Thanks
David

[sgaert]

the normal FSBus IO board. That all are normal switches.

[388TH_A]

I think im Still going to let you guy battle this one out as i dont know whats going on. For me never working with the Stepper motors or PCBs i dont under stand whats going on. Buti do have one question why would you use the IO PCB with the Steppers?

Trevor

[sgaert]

I would use the IO Board for the sensors, not for the Stepper.
For Davids idea with the 3 Sensors for 3 needels, you need 3 input. The easy is the IO Board.

@David: If you do that all with gears, than it is also possible to use only 1 Sensor on the slowest needle (10000). If your gears work well than the other needels are in the right possition when the 10000 is on 0.

[RobiD]

I thought you meant some type of Break Out Board where there are three connectors for the three optical interrupters (OI's) and one connection out to the stepper board.

Is this possible? If it is, any idea of where to go to get the info to build one. Something that would read all three OI's and send the signal to the stepper board only when all three are closed (interrupted).

I probably could use the 10000 needle for the OI but I feel it may not produce the result of all needles being zero'd. Trial and error I guess.

Thanks for the help
David

[sgaert]

You can do it with a break out board or what ever. But you cant deside which sensor generat the input.
The software is the problem not the hardware.

[RobiD]

Ok, I'll try it with the single OI on the 10000 needle and see how it goes.

Then it's down to getting the code started.

Thanks for your input Stefan.

David