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SD70M - Powered

Postby ConnorL » Thu Dec 19, 2013 2:28 am

Hello,

I had been working on a project for about a year now. The original thread on the forum is long gone, so I will be reposting my progress here.

Since March 2013, I had been working and adjusting my model in Solidworks 2013 that I created from a single image, scaled it to original size...then scaled it down to 1:450.

First, it was originally a dummy unit...but I took it even further.

I am working on creating a powered SD70M locomotive, this is extremely challenging since the chassis width are so narrow that the official T-Gauge motor won't even fit.

Instead, I used a 3.2mm Shicoh motor instead of the standard 4.0mm Shicoh motor to power the locomotive.

I had to do a lot of calculations to figure out the correct gear that are suitable for T-Gauge's motorized wheels, when I did...I headed down to: http://www.shop.kkpmo.com/ and ordered my gears from there according to the diameter that I had specified.

I went all over the places (websites) and ordered parts, I ordered some 0.6mm, 0.8mm, and 1mm brass rod which will be used as fitting for the worm-type gearbox.

At last, I ordered a Shapeways model of this locomotive that recreates an actual model of your 3D model according to the scale you put it in.

Stay tuned for more and deeper into parts.
Attachments
MP7000.jpg
Where I first started.
(115.21 KiB) Downloaded 1983 times
SD70M T-Gauge.png
3D Model of SD70M
(297.34 KiB) Downloaded 1983 times
ConnorL
 
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Re: SD70M - Powered

Postby GarrattHamster » Thu Dec 19, 2013 9:25 am

Hi ConnorL

This is some truly great work. I really can not wait to see future up dates of this locomotive. keep up the great work.
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Re: SD70M - Powered

Postby ConnorL » Tue Dec 24, 2013 2:36 am

Finally got settled back home.

After creating the 3d models, they were separated and prepared for Shapeways to be printed.

After that, an order was placed at Shapeways and the waiting game begins.

In about 2 weeks, I received my package in the mail which contains the 3d model.

The hardest part was creating the drive shaft since the parts are so small and fragile...but I managed to.

I removed the images, because they are too big and might causes problems to some users but the links are present.

EDIT: Also I can't upload pictures anymore since they exceed 2MB.

[spoiler]http://i39.tinypic.com/1euq0l.jpg[/spoiler]

(Sorry for poor camera quality, I will get a macro lens soon)

[spoiler]http://i43.tinypic.com/ip9isn.jpg[/spoiler]

[spoiler]http://i40.tinypic.com/2ryh8va.jpg[/spoiler]

[spoiler]Image[/spoiler]
Last edited by ConnorL on Tue Dec 24, 2013 2:40 am, edited 2 times in total.
ConnorL
 
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Location: Chesapeake, VA USA

Re: SD70M - Powered

Postby ConnorL » Tue Dec 24, 2013 2:39 am

Sorry about this MASSIVE picture, the spoiler function doesn't work.
ConnorL
 
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Re: SD70M - Powered

Postby GarrattHamster » Tue Dec 24, 2013 7:12 am

Hi ConnorL

The loco is looking great. I have to say i am quite invested in knowing how much you think she could pull. And ask if there any chances of any future clip's of seen in action.
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Re: SD70M - Powered

Postby dkightley » Tue Dec 24, 2013 11:32 am

Sorry about this MASSIVE picture, the spoiler function doesn't work.
Its not that this feature doesn't work.....its a customised add-on patch to the bulletin board code that I haven't got installed.

EDIT: Also I can't upload pictures anymore since they exceed 2MB.
You've never been able to upload pictures to this forum above 450kB in size....and I'm afraid I'm not going to be in a position to allow large file sizes. I don't have any sponsorship or external funding to pay for the hosting of the forum - it comes out of my own pocket! If I allow large files, then the day I have to start paying more will be sooner rather than later!!
Doug Kightley
Webmaster here and volunteer at the National Tramway Museum http://www.tramway.co.uk
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Re: SD70M - Powered

Postby ConnorL » Wed Dec 25, 2013 7:33 pm

Ah thanks for the clarification, I thought it was built-in. I didn't know what we had limit haha.
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Re: SD70M - Powered

Postby jesse6669 » Thu Dec 26, 2013 8:48 pm

Looking really REALLY good! Does your mechanism run? Understanding it's a prototype I don't necessarily expect so, but I'm sure it will. You have most of the parts down!!

Not to hijack the topic, but photo posting here is a bit tricky. If the image is big you need to scroll around (I found you can right-click and open in a new tab though, this works pretty well.)

I think it looks best if the image is re-sized to 640x480, although I didn't do that with my own most recent pics.. Might try using hosted images from Skydrive and see how that looks.
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Re: SD70M - Powered

Postby ConnorL » Fri Dec 27, 2013 12:22 am

Thanks jesse for idea, I'll see if I can show pictures from google drive. Hopefully that will prevent it from "shutting down for extended bandwidth" and resize pictures before posting.

While holding the train in the air, the mechanism works, but I'm having hard time getting it working on the track because I had to hold the wire to the motor and it won't stay connected.

I'm designing the electrical contact for the wheels right now and when I do, I'll let you know how it goes.
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Re: SD70M - Powered

Postby dkightley » Fri Dec 27, 2013 1:39 am

On the subject of images....see here: http://www.talkingtgauge.net/viewtopic.php?f=3&t=89
Doug Kightley
Webmaster here and volunteer at the National Tramway Museum http://www.tramway.co.uk
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