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CHAIN-DRIVE ! - Components & Ideas For Miniature Drive Systems
 Moderated by: oztrainz Page:  First Page Previous Page  1  2  3  4   
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 Posted: Fri Apr 21st, 2017 04:04 pm
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oztrainz
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Location: Unanderra, Australia
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Hi all, 
Be very very afraid....Jose is having ideas 

FYI - A size comparison the larger-sized Tamiya ladder chain in their Educational range http://www.tamiya.com/english/products/70142chain_sprocket/index.htm (as used for the under-track haulage on the Corrimal Incline) and the Servo-Limk chain (as used for the drag chain elevating conveyor on Corrimal). See http://servolink.com/sprocks.htm for information on this smaller chain.

The elevating conveyor has yet to make an appearance here on the Corrimal thread., but it can be seen in test run mode at https://www.youtube.com/edit?o=U&video_id=ciV-aSDPkfM

and the Tamiya ladder chain with 10 mm diameter magnets attached to a link
Just another 2 chain drive options that are known to work,



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John Garaty
Unanderra in oz
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 Posted: Fri Apr 21st, 2017 08:49 pm
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Si.
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Hi John :wave:


Thanks for the pix. :bg:


I'm guessing that the large Tamiya chain is made of Delrin(TM).


How did you fix the magnets to it ?


I haven't tried gluing Delrin(TM) ...


... except maybe some small Grandt-Line parts, years ago.


Got any advice ?


:bg:


Si.


Bob ... The monorails look AWESOME !


Gonna have to ask you a couple of questions on your drive ...


... l a t e r



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 Posted: Sat Apr 22nd, 2017 10:06 pm
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oztrainz
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Hi all
The smaller Servo-Link chain is acetyl and the larger Tamiya chain is Delrin or similar.
Both can be glued but there as some provisos...
So far the best results have been obtained with 2 part superglues. These have a primer and a the glue - BUT...

The bond is brittle and any sharp sideways impact will shear the bond. In a straight pull situation the bond appears to be OK. 
The results obtained with solvent type glues for styrene were disappointing. and the 2 contact adhesives we tried were unsuccessful. 

BTW - if you try to glue anything to chains like these, ensure that you de-point your sprockets so that you don't push off the bit that you have glued to the chain.  We learned this one the hard way. 



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 Posted: Fri Jun 30th, 2017 12:31 am
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bobquincy
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Back to belt drive:

I have sold about 12 belt drive chassis and complete conversions in the past year, all of these are 2 stage reduction. They run at a high speed (about 1 foot per second) and while low speed operation is ok it is probably not good enough for a train. I originally looked at 3 stage reduction but shelved it due to complexity.

Well, now after a year of designs it does not look that difficult so I un-shelved it and am about to order 3D prints to make it work. I know there is a long way from drawings to a working train so this is probably not the final version but it looks good.

Final drive is dual belts for improved power capacity. My typical motor is a RC car motor so that would be replaced with something milder.

Last edited on Fri Jun 30th, 2017 03:33 pm by bobquincy



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