<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:10pt"><div>>Keep us posted, I am curious as to how this goes. My biggest concern<br>with steppers is, what if the instrument never gets around (or takes a<br>long time) to the "home" sensor? Ergo, you might have a sensor at 0*,<br>>but if your HSI (for instance) runs for 2 hours on a long flight and<br>never goes beyond the range of, say, 180* and 270*, will a stepper keep<br>>its position well enough to not "drift" the HSI? What sort of sensors<br>>(and how many) do 3D printers use?</div><div> </div><div>Dont most HSI's have a knob for correcting gyro drift? it gives you a (good) reason to check the compass. I know, its stepper would drift too.</div><div> </div><div>I doubt an F-15 sim will ever stay on the same heading for such a long time. My F-4 never has. 10 minutes is
about max :)</div><div> </div><div>The flightIllusion stepper motor driven instruments never drifted on me. They stayed calibrated. </div><div> </div><div>Justin</div></div></body></html>