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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
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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 |
#2
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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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Scott "No load is too Small" |
#3
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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 |
#4
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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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Nathan |
#5
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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
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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 |
#7
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Re: He is at it again! 1:50 Dozer Conversion
Pull 2 scrapers, and fill 1 with batteries & fake dirt!
Cheers, Neil. |
#8
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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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Scott "No load is too Small" |
#9
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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 |
#10
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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. |
#11
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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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Nathan |
#12
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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 |
#13
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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. |
#14
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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 |
#15
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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
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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 |
#17
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Re: He is at it again! 1:50 Dozer Conversion
What/who makes is it?
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#18
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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.
__________________
Nathan |
#19
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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 |
#20
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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.
__________________
Scott "No load is too Small" |
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