In this video I wanted to present new dual shaft coreless motor that was launched very recently by Chinese manufacturer after my suggestion, because I think such motor is missing on the market (this motor is very powerful - it has blocking torque of approximately 20 mNm). This motor is full success - it is silent, and excels in my locomotive - I think it is great solution for any locomotive with two trucks or any case where motor with two shafts is required, and space is available for 17x25 motor. Motor has two shafts 12 mm long, 1,5 mm in diameter.
Motor can be bought here:
www.aliexpress...
www.aliexpress...
Picture of new motor here:
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Original motor in locomotive:
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Original motor and new motor side by side, and preparation of new motor to accept original worms with 2,0 mm bore:
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Original motor and new motor with extended shafts:
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New motor is installed:
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The locomotive itself was a huge disappointment when I first unpacked it and put on tracks. It was extremely noisy, not just because of large motor with equally large flywheel, but also because Fleischmann implemented here technical solution that I cannot understand - two middle wheelsets had a vertical play of approximately 1,6 mm (!!!), probably to enable better electrical pickup. This technical approach is nothing new, Fleischman used it in many locomotives, e.g. steam locomotives with tenders where two outer wheelset are rigid, while the middle two have large vertical play.
But wheelsets in these steam locomotives do not have gears - they are not powered - but in this locomotive, all four axles are powered (all have gears). Due to excessive vertical play, gears of two middle wheelsets “jumped” while locomotive was running which caused improper gear meshing, so very unpleasant noise was the consequence. In addition to that, gears and shafts (inside locomotive chassis) were not lubed at all (completely dry), while gear teeth / worm were lubed as usual. Combined with normal noise of large iron core motor, locomotive “performance” out of the box made me almost cry. I paid a lot for it - and such disappointment! I am really sorry that I did not make a video of it "out of the box".
I first had to solve “vertical play” issue. I used brass tube (2,0 / 3,0 mm) to make sleeve bearings for two middle wheelsets. Then I widened a bit with round file original groove in locomotive chassis, to enable use of wheelsets that now had brass sleeves 3 mm wide. It is not an easy task if you do it with your hands - if you file to much, you have a problem. How these sleeves look like when installed on wheelsets can be seen on picture linked below. Notice also thread in the middle at the bottom of locomotive chassis - Fleischmann here used just plastic clips on bottom cover, which could not hold the wheelsets in place - so even larger vertical play was possible. Beside that, these clips were practically impossible to reach - so removing this plastic bottom cover is not an easy task at all. Once opened, I decided to make a thread and cut off these clips from bottom cover. Now I can lube wheel gears and remove wheelsets easily.
up.picr.de/453...
Note on Zimo decoder motor control values: CV 9 = 71, CV 56 = 111 (not 133 as for all other coreless motors I have). Value of 111 is proposed by Zimo for large coreless motors, 133 for small.
Locomotive is still not finished - I installed a cab light, and hope that my friend will succeed to close coupler opening in one front skirt. Then some painting according to original photos is planned, and that would be all.
Hope you like the video.
Негізгі бет Fleischmann DRG E19 and new Chinese dual shaft 1725 coreless motor
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