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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/3QXNNTGTUIXJO7Y3MCMUYIGSFPGTQI6S/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "3QXNNTGTUIXJO7Y3MCMUYIGSFPGTQI6S",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/O4XHGJ7GM6VPAPDUJ3JXGAR55QRRP52A/",
    "sender": {
        "address": "stanw1le (a) verizon.net",
        "mailman_id": "cde59a7de6874af3b354fb231df89b4c",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/cde59a7de6874af3b354fb231df89b4c/emails/"
    },
    "sender_name": "Stan, W1LE",
    "subject": "[amsat-bb] Re: antenna rotator test",
    "date": "2010-11-09T00:55:54Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/O4XHGJ7GM6VPAPDUJ3JXGAR55QRRP52A/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hello Nayer,\n\nI have not seen any other's response, so, here is mine....\nPerformance verification, one step at a time.\n\nI verify performance and calibrate all scales before the positioners are \nput on the tower.\n\nStart off reading the instruction manual for operation and maintenance.\nReplace any corroding hardware as needed, one piece at a time.\nBe sure all hardware is torqued properly and NOT loose.\nDo not hesitate to grease all threads with a tenacious axle grease, all \naseembly bolts/screws and clamps.\nThe grease allows you to take stuff apart 10 years later.\n\nBefore connecting anything, measure the resistance of the AZ and EL \npositioner\ninternal position indicating potentiometer.\n\nDo the numbers agree with the manual ?\n\nMeasure the motor winding resistances. Do both the AZ and the EL \npositioners.\n  Document findings. Is the manual in agreement ?\n\nDetermine how much rotator control cable length you will need\nSketch out a wiring diagram and document the wire color scheme you will \nbe using.\n(My 8 conductor rotator control cable uses 8 different colors.)\n\nAssemble the cable to the AZ and EL rotator with the actual length of \nrotator control cables to be used.\nDo not add antennas at this time. Orient the AZ and EL positioners as \nthey would be used.\n\nMeasure the resistance of the AZ and EL motor windings, with the cable \nattached, at the controller end of the cable.\nMeasure the resistance of the indicator potentiometer for both AZ  and EL.\nDocument your findings.  Are readings reasonable ?   Correct any problem.\n\nWire up the control cables to the controller and add a means of \nmeasuring the AC current to the controller.\n\nApply AC power to the controller and note the AC current draw.\nExercise the AZ rotator, verify that the AZ rotator turns clockwise or \ncounterclockwise as activated.\nNote the AC current when the AZ rotator is turning. AC current should be \nthe same CW or CCW rotation.\nIs the azimuth indicator going thru it's entire display range ?\nCalibrate the AZ display according to the manual. Verify position range \nafter any adjustments.\nSome AZ controllers only go 360 degrees +/- a few degrees , some go more.\nPark the AZ positioner at one end of its rotation. I call this NORTH. \n(0.0 degrees true north)\n\nExercise the EL posioner, Calibrate the display as indicated in the manual.\nNot the mechanical noise to the AZ or EL motor turning.\nMeasure AC current to the positioner as the EL motor is turning max \nspeed. Document.\nPark the EL positoner at 0.0 degrees elevation.\n\nMeasure the AC or DC current from the controller to the AZ and EL \npositioner, document.\nMeasure the voltage at the controller output, no load and full speed \npositioner load\nDisassemble and reassemble on the tower. Add the antennas\nSlip the mast for 0 degrees true north. Torque down the mast clamps\nSlip the boom for 0 degrees elevation. Torque down the boom clamps.\n\nExercise the AZ and EL over its full range. Measure AC current to the \ncontroller with antenna loading.\nMeasure the AC or DC current from the controller to the positioner, with \nantenna loading.\nDocument findings.\n\nPlay satellite.....\n\nI hope this helps\n\n\nStan, w1LE     Cape Cod     FN41sr\n\n\n\n\nOn 11/8/2010 7:37 AM, N. Mahdinejad wrote:\n> Dear all.\n>\n> Thanks for Bob W7LRD and Greg D for answering to my last question.\n>\n> Is there any standard document or other for test antenna rotator? Some\n> functional and environmental tests.\n>\n> If anyone is familiar with these tests, please send me a link to read or\n> download some useful documents.\n>\n> Any help would be gratefully appreciated.\n>\n> Best regards.\n>\n> Nayer Mahdinejad.\n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of the author.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>\n\n",
    "attachments": []
}