1:35 Bucket chain excavator Ertmer KB 1

[finescalerr]

Remarkable. -- Russ

[Design-HSB]

Great construction and implementation, thank you for showing.

[Hauk]

The profiles are placed in the jig and then soldered at the points of contact.

Very interesting build!
What material did you use for the jig?

By the way, any news on the castings?

[Ray Dunakin]

Wow!!

[TRAINS1941]

Excellent work!  Don't tell me you solder the joints together with that match!! 

Jerry

[Bernhard]

Thanks guys for your interest.

Hauk:
I usually use MDF boards (medium-density fiberboard) for the soldering jigs. They can be milled very well, with clean edges. However, thin bridges tend to break off easily. For more demanding gauges, e.g. for the bucket ladder, I use Pertinax (hard paper).
I haven't received the castings yet, but I am sure that they are in progress. I will keep you up to date.

Jerry:
Fortunately I have other instruments for soldering!
The whole construction is partly soldered and partly glued.

Bernhard

[Bernhard]

The next subassembly is the chain drive.

[Bernhard]

As drive I use a small Faulhaber motor with a planetary gear.

[Bernhard]

First the drive beam is milled.

[Bernhard]

This is followed by the clamping piece for fastening the motor.

[Bernhard]

Then the two pillow blocks for the drive wheel bearing must be manufactured.
Milling the raw form.

[Bernhard]

Use a quarter-circle cutter to mill the rounding of the block.

[Bernhard]

Drill the hole, then cut off the individual parts with the circular saw blade.

[Bernhard]

The finished parts.
On the right you can see some smaller blocks which will be used on the bucket ladder.

[Bernhard]

And here's the finished drive.
The drive wheel is still missing. I will do that when the chain is ready, so that it fits exactly.

I wish you all a happy new year and a lot of fun with model building.

Bernhard