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Showing results 51 to 75 of 84
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Posts Made By:
crueby
Forum:
Construction Equipment
02-27-2020, 10:27 AM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Hi Rob,
For the stick I am tempted to leave that motor in place, have been online looking at videos of real excavators at work, and the stick speed is about like that. If I go faster, it wont be...
Forum:
Construction Equipment
02-26-2020, 06:57 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Got a chance to wire up the motor and reassemble them boom, to give it a first motion test. This test was done with a 98 rpm gearmotor, I have faster and slower ones to let me dial in the max...
Forum:
Construction Equipment
02-26-2020, 03:34 PM
Replies:
71
CATERPILLAR 390D LME 1:8
Views:
31,663
Posted By
crueby
Re: CATERPILLAR 390D LME 1:8
Wonderful setup for the machines - and they are BIG! :jaw:
Forum:
Construction Equipment
02-25-2020, 04:10 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
I was hoping they would stay over on the other forum with Zee! :)
Forum:
Construction Equipment
02-25-2020, 02:17 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
I had not thought of that, nice idea!!
Forum:
Construction Equipment
02-25-2020, 08:04 AM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Hi Kerst,
The leadscrew bases are held in with sealed ball bearing units, so that end is good. The screws themselves are polished steel with bronze followers, so they are designed to be able to...
Forum:
Construction Equipment
02-24-2020, 07:46 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
And another bit done this evening - made the pivots for the cylinder ends, and milled the opening for the first flex shaft (to move the stick). The motor has been mounted, ready for some wiring to...
Forum:
Construction Equipment
02-24-2020, 05:00 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Back on the excavator today - I already had some Octura flex cable that I considered for use to connect the gearmotors to the cylinders, but it was too thin and twisted up under load. So, got hold of...
Forum:
Construction Equipment
02-20-2020, 10:08 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
:lol:
Forum:
Construction Equipment
02-20-2020, 09:43 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Thanks Don!!
Forum:
Construction Equipment
02-20-2020, 02:38 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Been away from the model for a few days, this afternoon made and installed the pivot bearings/rod to connect the booms together. Nice to see some parts attached and moving! A couple small fasteners,...
Forum:
Construction Equipment
02-16-2020, 11:05 AM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Got the plates on that hold the cylinders, next will start on the pivot bearings and rods at the joint. Then can start on getting the motor into the boom and give it a real test!
Here it is...
Forum:
Construction Equipment
02-15-2020, 03:35 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
I've got a slip ring to get the wires down to motors underneath, plan on having a pair of gearmotors to run the tracks. To start with, will use some metal tracks and sprockets that I got from an RC...
Forum:
Construction Equipment
02-14-2020, 02:09 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Got started on the plates to hold the cylinder bases to the booms:
https://i.postimg.cc/BbYGFbk4/IMG-6732a.jpg
Test fitting, needs a little trimming on the mating surfaces and some sanding...
Forum:
Construction Equipment
02-13-2020, 01:53 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Thanks guys!
Got some shop time on the excavator again, made up the plates for the top of the outer boom:
https://i.postimg.cc/0QtFBmsp/IMG-6719a.jpg
Next up is to make the plates that...
Forum:
Construction Equipment
02-09-2020, 05:00 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Thanks guys! I've been getting the plates for the cylinders to attach with patterned out, hope to get enough together soon to test moving the outer boom with the motor.
Forum:
Construction Equipment
02-07-2020, 02:29 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
More done on the main boom, made up the steel plates for each end which will hold the pivot bearings/rods. They were milled out of 303 stainless bar stock and screwed in place.
...
Forum:
Construction Equipment
02-04-2020, 02:27 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
The two booms are further along, got the four sides bolted together, ready for the steel pivot plates. They are quite rigid, dont think I will need any internal steel framework other than the plates...
Forum:
Construction Equipment
02-02-2020, 06:03 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Thanks Rob - the Marion build was in a whole different league than this one, everything was scratch built on the Marion, thousands of parts, this one I am using off-the-shelf parts wherever possible...
Forum:
Construction Equipment
02-02-2020, 04:57 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
I did a full build log over on the Model Engine Maker site:
http://www.modelenginemaker.com/index.php/topic,7530.0.html
There will be an article series with full plans of the build starting...
Forum:
Construction Equipment
02-02-2020, 04:48 PM
Replies:
77
Newbie Scratch Build - D575A Dozer
Views:
20,451
Posted By
crueby
Re: Newbie Scratch Build - D575A Dozer
Those track links are looking great! Where did you get the laser cutting done?
Forum:
Construction Equipment
02-02-2020, 04:44 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
More work on the booms, rough cut the top/bottom pieces and have started forming them. The ends will be solid steel milled to shape.
https://i.postimg.cc/vmy48Tcx/IMG-6632a.jpg
The pieces...
Forum:
Construction Equipment
02-02-2020, 04:40 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Thanks Rob!
I am using aluminum for ease of working plus cost, plus I already had a couple sheets left over from some fixtures we built before I retired. Normally I use 303 stainless on most...
Forum:
Construction Equipment
02-02-2020, 01:45 PM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
And started riveting on the angle stock to hold the top/bottom panels. Those will be screwed on, with screw blocks inside the angles since the angles are just aluminum. This will let me access the...
Forum:
Construction Equipment
02-02-2020, 09:51 AM
Replies:
99
Cat 340D Excavator build
Views:
20,015
Posted By
crueby
Re: Cat 340D Excavator build
Got the last bits on the cylinders done, time to start working on the booms. This morning got the side panels cut from some 1/8" aluminum plate:
https://i.postimg.cc/7PT094HQ/IMG-6628a.jpg
Showing results 51 to 75 of 84
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