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Author Topic: 1:35 Bucket chain excavator Ertmer KB 1  (Read 20814 times)
Bernhard
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« Reply #120 on: January 12, 2020, 08:58:51 AM »

And there's the support.


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Bernhard
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« Reply #121 on: January 12, 2020, 08:59:18 AM »

And this is how it is attached to the model

Bernhard


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finescalerr
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« Reply #122 on: January 12, 2020, 02:06:25 PM »

Disturbingly adequate. -- Russ
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Ray Dunakin
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« Reply #123 on: January 12, 2020, 07:47:34 PM »

Marvelous!
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Visit my website to see pics of the rugged and rocky In-ko-pah Railroad!

Ray Dunakinís World
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Klosterstollen


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« Reply #124 on: January 13, 2020, 06:18:04 AM »

Bernhard, if I see it that way, I might also like such a model. But such a bucket chain excavator unfortunately does not fit my "Klosterstollen".
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Regards Helmut
the journey is the goal
Bernhard
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« Reply #125 on: January 14, 2020, 02:35:09 AM »

Helmut,
I know the problem too. Recently found this video on the Internet:
https://www.youtube.com/watch?v=1RJfnk2S330
Since then I've been thinking about building such a beast. It doesn't fit to my other works either, but the modelling challenge would appeal to me.
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1-32
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Hi, I'm Kim.


« Reply #126 on: January 14, 2020, 03:37:55 AM »

Yes, those ore unloaders of the great lakes the operator's cabin were just above the jaws he rode the arm into the hold then back out -crazy. Your bucket excavator is looking great.
cheers
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Bernhard
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« Reply #127 on: January 19, 2020, 03:56:51 AM »

Now we come to one of the more sophisticated subassemblies: the bucket ladder.
It consists of three parts:
  • The upper part, which is permanently mounted in the machine.
  • The middle part, which is made up of three parts: two short headers and a long central part. This was obviously available in different lengths, because I have seen old photos of excavators that had a much shorter bucket ladder.
  • The levelling piece with the chain wheels.


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« Last Edit: January 19, 2020, 03:58:34 AM by Bernhard » Logged
Bernhard
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« Reply #128 on: January 19, 2020, 04:00:08 AM »

Let's start with the upper part.
It is important that the width of the chain guide at the bottom of the bucket ladder fits exactly, because the chain has only a few tenths of a millimeter of play.
The production is done in three steps:
1.) Solder a left and a right side frame.
2.) Connect the two side frames at the top with cross profiles.
3.) Attach the stiffeners.


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Bernhard
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« Reply #129 on: January 19, 2020, 04:00:46 AM »

First a soldering jig for the side frames is milled, this time into a Pertinax plate.


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Bernhard
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« Reply #130 on: January 19, 2020, 04:01:13 AM »

And these are the prepared parts for the whole upper part of the bucket ladder.


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Bernhard
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« Reply #131 on: January 19, 2020, 04:01:46 AM »

The two soldered side frames.


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Bernhard
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« Reply #132 on: January 19, 2020, 04:03:12 AM »

For step 2, another jig from Pertinax is milled, ...


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Bernhard
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« Reply #133 on: January 19, 2020, 04:03:40 AM »

... and soldered the cross profiles on this one.


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Bernhard
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« Reply #134 on: January 19, 2020, 04:04:15 AM »

The soldering jig is pulled out...


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