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Post by Deleted on May 29, 2017 17:07:29 GMT -5
Before I make a (fatal ? ) error, I prefer to ask some modellers who have more experience. In a few days I will get my 4 AZL locomotives, 2 NH-Budd's ("old" generation) and 2 GP7/9's. For break in I plan a "rectangular" layout, 4 curves of 270mm radius (the minimum on my final layout) separated by several "straight" sections. I wanna run my various locos "single", not in MU and without any cars, several minutes in one direction, say clockwise, then stop the engine, put it on the track in the opposite direction and run it again clockwise, so from the loco's point of view it will run alternatively in both directions and curves in opposite directions too. 1) Is this method correct, and are succesive periods of 5 min in each direction adequate ? 2) Are there some maintenance operations to be made before, during and after break in ? 3) What voltage is adequate ? 4, 5, 6v ? And should I increase the voltage for each run ? And up to ... what ? It seems silly, I don't have a railroad controller, only a (big) DC regulated, adjustable lab power supply ! 4) Should I allow the motor to "cool down" after each period of continuous running ? And what TOTAL amount of time for each loco ? 5) What other "care" should be taken during break in ? Thanks for every idea ...
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Post by markm on May 29, 2017 17:45:13 GMT -5
That is much the same as I do: 5 minutes each forward and reverse, clockwise, counter-clockwise. I run about 9VDC to burn-out any contact resistance in the loco first, then about 4 VDC to verify performance. These units should run for hours without any noticeable heating, but check during the first cycle that the loco isn't getting warm. My recent acquisitions have run good right out of the box and I haven't seen any marked performance improvement after burn-in.
About the only maintenance I can think of is to check the shell is on properly before you start and check to dust and dirt when you turn the engine around.
If you have to use a lab supply, current limit it to 100mA and if it exceeds 12VDC use a zener diode as a clamp.
Oh and don't forget to check the headlights.
Mark
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Post by domi on May 30, 2017 1:33:00 GMT -5
All what appears above is good. Myself, as I've no test "8" but a classic oval as test track, consisting of straight and R195 sectional, I do as said earlier : one way in, one way out, then lifting and turning the unit, and beginning again. 10' for each cycle, so 40' total. I find it OK.
About voltage, I don't really do any measurement, I just set a mean power that allows the unit to run flawlessly.
Dom
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