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Die-Cast Conversions Tech. The tricks of installing drive line and electrical components into die-cast models.


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  #1  
Old 05-06-2013, 06:37 PM
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Default He is at it again! 1:50 Dozer Conversion

Well, here I go again! Bought a new dozer and it went directly to the bench.

Man, this is really TINY!



Machined off two out of three teeth on a 21 t pinion to drive the tracks.



I'm gona have to pull a scraper or something just to find space for a battery and RX!

Jim
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Old 05-07-2013, 12:18 AM
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Default Re: He is at it again! 1:50 Dozer Conversion

Go Jim!

This rx is 14mm wide:

http://www.hobbyking.com/hobbyking/s..._Receiver.html

Hey, i spy a ...a 1/32 slotcar crown gear in one photo..
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Old 05-07-2013, 07:07 AM
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Default Re: He is at it again! 1:50 Dozer Conversion

Slot car crown gear? What? Where? That was supposed to be top secret!

(It pays to have a jillion hobbies, I find all sort of small parts from the others to use in my conversion attempts!)

Jim
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Old 05-08-2013, 12:53 AM
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Default Re: He is at it again! 1:50 Dozer Conversion

Wow, that is a sharp looking model! This will be very interesting to watch. I don't think I've ever seen a documented thread on RC'ing a 1/50 scale diecast model. Very cool.
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Old 05-09-2013, 09:50 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

wow! never even thought of slot car parts! man the things that just jump at you when you finally see them!!
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  #6  
Old 05-22-2013, 05:22 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

Well, I kept at it and got it moving but the poor thing got hacked up way more than I wanted. I learned from the process, like you can't convert any darn thing you want you dern fool!

There is no room for a battery or RX. I thought about pulling a scrapper Nd hiding that stuff in the scrapper box, but that doesn't really fit with the sand and coal barge hauling setup I have going.

Here is the bench test video.

http://youtu.be/tNZDnqNWHHM

Jim
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Old 05-22-2013, 07:23 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

Pull 2 scrapers, and fill 1 with batteries & fake dirt!
Cheers, Neil.
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Old 05-22-2013, 09:07 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

Very cool. It really puts it into perspective when you lower the blade with your finger.
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Old 05-22-2013, 09:15 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

I am gona stew on it for a day or two and see if I can come up with any good ideas on stowing the battery and RX. I would like to add a blade control as well, won't be to practical without that. I have even thought about some form of a cam on the blade to lift the blade when backing up and drop it going forward. There is absolutely no more room in the engine compartment for a third servo.

Back to making the big gear in the dragline go around. I have room for the fifth servo there, just trying to figure out how to make it work from the TX point of view.

Jim
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Old 06-03-2013, 04:39 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

You should look into the lipo packs for the micro helicopters. They have them from

120MAH http://www.hobbypartz.com/77p-minili...-15c-1s1p.html

to

350 mah http://www.hobbypartz.com/77p-minili...-15c-1s1p.html

These are real cheap so you could buy several even if you had to change them out more often. I dont think you can get more power in a smaller package.
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Old 06-22-2013, 03:43 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

That's awesome! Perhaps you could build a cab and hide some components inside it?
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Old 06-22-2013, 06:05 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

Thanks for looking, and for the tips. I am sort of looking for a bit larger style dozer in 1:50 scale. I'm thinking a high drive model with a cab so I will have more room to work. What I really need it to see one in person so I can pick a good donor dozer. I have seen one or two, but each with problems that keep me from buying one.

I do have some small heli packs. I might just saddle them on somehow and get the poor thing moving until the new dozer comes along. Trouble with me, is since I can't see how I'm ever gona get the blade on it, and working, I just sort of give up on it.

Jim
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  #13  
Old 06-27-2013, 09:55 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

Give it a break - sit it on the shelf - and think on it - give the ol gray matter time to crunch it through.

I hear pager motors can make nice little screw drives.
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Old 09-05-2013, 12:16 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

My solution was to go bigger! Here is a short video of my 1/16 (seems small to be called 1/16) spec cast die cast dozer. Used micro servos with a pinion pressed on the top spline and slot it crown gears.

http://youtu.be/fu1EAJIgZzo

Jim
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Old 09-05-2013, 12:29 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

Where did you get the model? Looks like a really great conversion.
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  #16  
Old 09-05-2013, 12:53 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

There is a local die cast place here in Des Moines that carries mostly Ag stuff but they always have some construction stuff also.

Jim
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Old 09-05-2013, 01:02 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

What/who makes is it?
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Old 09-05-2013, 01:03 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

Wow, that's a nice conversion! It runs really smooth too. Any photos that you could share of the model? I wonder how well the tracks will hold up, or if they will clog with dirt.
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Old 09-05-2013, 01:10 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

I just got it going and expect I'll have some adjustments to make before long. I also don't have the blade hooked up yet and I should be able to get that working as well.

The tracks are going to be trouble. Ther roll really nice and free, but anything in the links causes trouble. I have a few ideas, but I'm going to finish the blade control first. It may become more of a clean surface machine if I have too much trouble with the tracks. The biggest problem is the scale. Seems like small grains of sand not only get into the links and clog up when the sprocket comes around, but the treads also bind up. I may try to clean out some of the paint where it is real tight, but that is on the back burner for now.

I'll get some photos of the details of the drive system in a day or so...

Jim
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  #20  
Old 09-05-2013, 02:32 PM
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Default Re: He is at it again! 1:50 Dozer Conversion

Jim, your 1/16 conversion runs nice. Nice job.

On my cable excavator i had to "sharpen" the cups between each tooth so that basically just about a knife blades width actually touches the tracks so that dirt doesn't bind it up.
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