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Search took 0.01 seconds; generated 65436 minute(s) ago. Search: Posts Made By: SteinHDan
Forum: Construction Equipment 04-29-2016, 06:41 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Added a simple mount for the brain (CPU) of the excavator. At the same time I replaced the Raspberry Pi 2 with the version 3. It's mostly the same, but a little bit quicker and has WiFi and BlueTooth...
Forum: Construction Equipment 04-29-2016, 06:32 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Yep, that's good advise.There is a flat spot, but I just hadn't tightened it and I only added the left set screw, not the right. Lot's of screws loose at this point, like you say, it gets taken apart...
Forum: Construction Equipment 04-25-2016, 05:21 AM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Yes, true, I just thought the 3kg would be less violent when it engages. It should probably be a pulling spring instead of a pushing spring so that the backlash is only seen when pushing hard with...
Forum: Construction Equipment 04-23-2016, 05:06 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

If someone is wondering why the excavator is standing on planks, then the reason is that I didn't want it to get dirt into every corner of the track when it's going right back onto my work bench. :o...
Forum: Construction Equipment 04-23-2016, 04:39 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Thanks, Joe! That means a lot, coming from you!


I've not seen the springiness in the stick before since I haven't been pushing anything hard, but it's caused by the combination of the 6kg gas...
Forum: Construction Equipment 04-23-2016, 03:23 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

First test digging dirt!


http://d1t2tbzmskak12.cloudfront.net/cat-excavator/VideoFirstDirtDig.jpg
(https://youtu.be/YNJewdL_CPk)

https://youtu.be/YNJewdL_CPk
Forum: Construction Equipment 04-23-2016, 03:18 PM
Replies: 78
Views: 41,549
Posted By SteinHDan
Re: Fumotec 490

Very tidy and nicely laid out!


You already got some good advice on the battery, but here is even another one: :-)

I have this battery in my excavator. It's quite cheap and small while still...
Forum: Construction Equipment Tech 04-21-2016, 04:37 PM
Replies: 6
Views: 2,952
Posted By SteinHDan
Re: Slewing bearing

ptebbe: Where did you get that 72t gear ring? Do you have a link? Thanks in advance! :-)


I also used a tapered bearing on my excavator, but I also had another opposite-facing tapered bearing for...
Forum: Construction Equipment Tech 04-21-2016, 12:03 PM
Replies: 10
Views: 4,427
Posted By SteinHDan
Re: good dozer gear motor

Sure, just get some continuous rotation ones:
- Spring RC SM-S4315M 15kg (http://amzn.to/1r22eAW)

or convert some to continuous rotation. There are lots of videos on YouTube on how to convert:
...
Forum: Construction Equipment Tech 04-21-2016, 06:57 AM
Replies: 10
Views: 4,427
Posted By SteinHDan
Re: good dozer gear motor

I've used this type for various projects, and it worked very well for me with 3S battery. I've seen some others on here use it too. Totally quiet and very strong. Rated torque at ~30kg/cm and stall...
Forum: Construction Equipment 04-14-2016, 02:17 AM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Hi Trucker_Jo!

Yes, it's pretty cool, but this print was a pain. I started it and it ran for 5-8 hours four times before I got one successful print. The problems were lifting edges, support coming...
Forum: Construction Equipment 04-13-2016, 06:15 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

I really wanted this excavator to have proper sound. Deep and powerful bass. Not toy-like. I looked around a bit to try and find a large speaker that would fit, but came up empty. So I printed one...
Forum: Construction Equipment 04-13-2016, 05:51 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Thanks, DADSGARAGE! I'm following your build with excitement! :-)
Forum: Construction Equipment 04-04-2016, 04:34 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Mounting the motor controllers (ESCs)

I wanted to mount the motor controllers in a compartment that had plenty of air flow, as they are the components that need the most cooling. I put them where...
Forum: Construction Equipment 04-03-2016, 02:36 PM
Replies: 281
Views: 185,276
Posted By SteinHDan
Re: PC1800 Front Shovel (1/12)

Pure eye candy!! :drool:
Forum: Construction Equipment 04-03-2016, 02:34 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Thanks, Bigford! The snow has melted away here now, so as soon as I have it assembled again I'll make a video of it digging dirt. :-)
Forum: Construction Equipment 04-01-2016, 06:59 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Mounted the counterweight to the base plate. After testing with 4, 6 and 8 kg ballast, it seemed 6 kg (13 lbs) gives the best balance.

I bought 2 kg (4lbs) lead plates from a local scuba-diving...
Forum: Construction Equipment 03-21-2016, 05:16 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Starting to paint the metal parts on the boom, stick and bucket linkage. Need a couple more layers on the stick parts.
The paint color is the closest match I could find to the ABS filament color in...
Forum: Construction Equipment 03-20-2016, 03:37 AM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Hi RobotArms24!


The infill is set in the printer settings (not in the model) and it's typically only used for FFM-machines (the typical home desktop 3D printers). Shapeways will always make a...
Forum: Construction Equipment 03-19-2016, 06:51 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

3D printed the ABS plastic parts that go in between the aluminum sides in the boom and stick sandwiches. I also re-did the boom sides in 3mm aluminum, as by mistake I made them 6mm thick the first...
Forum: Construction Equipment 03-19-2016, 06:20 AM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

I've added some bronze self-lubricating bearings to the bucket linkage. I don't think they were really required, and it goes against one of the goals of this project, to keep it simple, but it just...
Forum: Construction Equipment 03-06-2016, 03:21 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Hi all!

Thanks for all the comments! I've not posted many updates lately because I've started working on the finish that will go over the skeleton and make the excavator look more like the CAT...
Forum: Construction Equipment 03-06-2016, 03:15 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Hi Lil Giants!




I think it's very roughly around $1000 at the moment, but I'll set up a full bill of materials when I get it a bit more finished.


Best regards,
Stein :-)
Forum: Construction Equipment 03-06-2016, 03:11 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Hi Machfab!

> Will the gamepad/pc controller give you proportional control of the gearmotors or just on/off control?

The gamepad gives full proportional control for all the gear motors,...
Forum: Construction Equipment 12-27-2015, 05:34 PM
Replies: 164
Views: 142,032
Posted By SteinHDan
Re: 90 ton 1/14 metal excavator scratch build w/embedded PC

Moving some snow:


http://d1t2tbzmskak12.cloudfront.net/cat-excavator/skeleton_video_2.jpg (https://youtu.be/3Uzl0L9bS7g)


https://youtu.be/3Uzl0L9bS7g
Showing results 126 to 150 of 188
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