Recent Posts

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1
EMU / DMU / Re: 2-knowledge...
« Last Post by cabbage on Today at 11:24 »
Tim, I used to work for Siemens. Each motor has a fuse and there are master fuses on the feed between coaches and the battery pack.

A replaced fuse is cheaper than re-wiring. Always remember that the fuse is designed to blow!

Regards

Ralph
2
EMU / DMU / Re: 2-knowledge...
« Last Post by Peaky 556 on Today at 10:18 »
Ralph,
Regarding current draw, it’s the stalled motor current that’s more important to know than the driving current. In the past I’ve had bits of twig and grit jam my gears, which is why I have now introduced fully-enclosed gearboxes! 
Tim
3
EMU / DMU / Re: 2-knowledge...
« Last Post by cabbage on Today at 09:02 »
A bit of maths and measurement! Having fully charged up a 12V SLA to 13.2V. I did a current drop test. Each Cannon motor pulls 0.44A simply driving the bogie. This means roughly 2A  for a complete 2-Nol. The "MU" connections can easily manage this thus the envisaged four car set will need to be wired to take 6A along its 12V bussbar cables. One ESC could manage the complete consist.

It is a nice day - time to do some work in the garden...

Regards

Ralph
4
EMU / DMU / Re: 2-knowledge...
« Last Post by cabbage on Yesterday at 15:09 »
Today has been a day of making the tools to get the job done. I purchased from the Fosse a set of 8mm seriel taps for cutting the plastic parts. They work well but they clog like "the lions jaws with the peanut butter sandwich in them". Wether small children would be saved from being eaten by a lion by having it eat peanut butter sandwich and thus stick its teeth together - is adult debatable. But most African children under 5 will swear it works...

Anyway the tap holder will not reach the hole and " go around". Thus it was stuck in the end of a length of steel pipe and held there with gaffer tape. A mole grip supplied a handle and (delicately) I cut an M8 thread into the bogie block. Now I have a point that I can use for "star earthing" all the electrics to -as well as fasten the bogie to the loco...

Regards

Ralph

5
EMU / DMU / Re: 2-knowledge...
« Last Post by John Branch on Oct 20 2019 15:10 »
Ralph,
Thanks-the ones I have fit between solebars but only just!  These would be a lot neater.
Best,
John
6
Items Wanted / Live steam Sentinel
« Last Post by hornbeam on Oct 20 2019 11:58 »
Morning,

Bit of a long shot but does anyone know of any members what are selling the GRS live steam sentinel?

Thanks

Simon.
7
EMU / DMU / Re: 2-knowledge...
« Last Post by cabbage on Oct 20 2019 08:46 »
They are 50mm square and a pack of 10 was bought off eBay.

Regards

Ralph
8
EMU / DMU / Re: 2-knowledge...
« Last Post by John Branch on Oct 19 2019 16:38 »
Ralph,
That lazy susan swivel looks somewhat smaller than the ones I have found, and  could be very useful.  What is the length/width?
Best
John
9
EMU / DMU / Re: 2-knowledge...
« Last Post by cabbage on Oct 19 2019 15:59 »
I was right about the chain splitter... However a quick kiss with the angle grinder the link fell apart. Here is the shot of the completed bogie unit.





The othet bogie has been pressed into service for a rough assemnly shot. It looks very high but a quick once over wih the steel rule shows it to be correct. I assume once the under carriage brick a brack has been added it will even out(?)





Time for tea and a well earned gingernut (or five) to dunk into it.

Regards

Ralph
10
EMU / DMU / Re: 2-knowledge...
« Last Post by cabbage on Oct 19 2019 14:24 »
Being a vile taskmaster the household robots have had no rest! Here is the bogie mounting plate. It is basically a series of rectangular blocks filled with 80% fresh air. Despite this they are quite strong.








The 3mm and 8mm holes were "designed in". Why have a CAD/CAM machine and do it your self??? I have yet to try the chain breaker -this may be something for Sunday afternoon(?) It seems dangerously frail machine compared to the one I have for Duplex motorcyle chain...

Regards

Ralph
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