Henner, I know your frustration with glitching. I've been fighting it for years. My worst offender is my Ruby-Garratt with a steel boiler. First rule is don't use AM. I finally found away to have a glitch free system. I am currently using the SAM-2 Servo Smoothers from Sulpher Springs. At first they didn't work until I hooked the leads for channel two together in frustration. Since then I have built my own circuits using the SAM-2 chip. Still working programming my own chips so it doesn't cost $100 per channel. Still cheaper than using a PCM radio. For now I have two permanently installed in my K-27 (brakes and throttle), and one that gets swapped around with my five other engines for throttle.
Dave H. ----- Original Message ----- From: "Henner Meinhold" <[EMAIL PROTECTED]> To: "Multiple recipients of sslivesteam" <[EMAIL PROTECTED]> Sent: Sunday, August 22, 2004 7:00 PM Subject: More glitching > Hi, > a year ago I installed a radio control in my A-C_l_i_m_a_x. Though I am > quite familiar with electronics, I never got it to work properly. Switching > components (Xtals/Receiver/Transmitter/Servo) did not help, glitching was > just outrageous. Even a deglitcher would not help - the average would be > something near "zero". Quite an embarrassing situation: A nicely running > steam engine and a R/C acting up. Today I went through the recent postings > regarding glitching. Pete's contribution caught my eye: > > >Paul, > > >I talked to the guys at the local r/c shop, who sell mostly planes and > >cars, when I was buying servos for my first conversion. They told >me > about metal-to-metal glitching - apparently, any metal contacts >that are > loose (think of your loco-tender coupler, side rods, wheel >bearings, or the > truck pivots,) cause glitching and worsen >performance. > > >While at the store, note that most servo connection parts are nylon >or > similar plastic. No metal. Trains are obviously a hopeless case in >terms > of eradicating random metal-to-metal contacts! > > I tested the radio system with the engine stopped and everything was fine. > As soon as I touched one of the metal parts with a scew driver or moved the > engine, all hell broke loose: The servo tried to twist itself out of its > bracket ! Obviously my locomotive is the worst case scenario. The frame and > superstructure are mainly wood with the engine exposed in the middle. So all > the moving and rubbing metal parts are completely unshielded. On a "normal" > live steamer the bulk of the locomotive like boiler, cab, running board are > "static" and seem to shield the moving parts. Anyway, I tried several of the > tricks mentioned in the glitching thread, but nothing worked. I even tried > to ground the receiver to the steam engine/boiler... > Bottom line: 19th century mechanical designs and 20th century radio control > don't match. I have to continue running my engine manually, or wait for my > friend to complete his high tech based digital R/C system... > Regards > Henner > > >
