#31
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Thanks guys. To be continued...
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#32
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Hello everybody
I realized that I did not write anything for almost 2 and a half months Partly because we moved to other house and it took some time to recover, partly because the digger was damaged during the moving. So, new update. Had to remake the hinge number 1 again because of previous one was damaged The damage is seen on the picture below And then I continued to hydraulic actuators (pistons) Each actuator is constructed from Front small tube Aluminum cover for the front tube Rear large tube Three stopping rings that allow internal tube move inside external one Two end connectors Two rings that sit on the external tube Front and rear hydro line connectors A stop block (only on two actuators) Hydraulics tube made from PVC covered paper clip painted with permanent marker. To be continued. |
#33
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Glad to see you back to work on this.
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#34
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Looking Good :-)
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#35
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Hi all
More update. Started with digging arms assembly First I joined the Arm 1 (I.e. the boom) with its hinges. Then I glued in the hinge and the axle for the boom to stick hydro actuator with the actuator Then came the Arm 2 (I.e. the stick) with its hinges. Afterwards the hinges and the side cheeks for stick to bucket actuator with the actuator were installed. Then the bucket was installed on its axle, followed by connecting arms for the bucket. I must mention that almost all axles had to be remade from scratch. As I noticed earlier, I used thicker paper than suggested by designers. I also laminated some parts with 0.6-0.8 mm cardboard to make them look in scale. This brought to some axles being too short or too long. Also hinges 2 and 7 became too wide and had to be cut in two and narrowed by removing 2 mm strip from the middle. Then i tried to dry-fit the parts only to realise that the hydraulic actuators were mixed between. The actuator 3, the long one should be on the boom moving the stick and the actuator 4 should be mounted on the stick moving the bucket. Removed the hinges 2 and 7, axles, actuators and reinstalled everything in the right way. Finished assembly by connecting all the bucket linkages, axles and hinges and then mounted the stick on the boom. Then I connected the main actuators numbered 1 and 2 to their upper hinges I must say that although the instructions are really clear explaining the sequence of assembly, need to be careful with numbering of the parts and axles. Need to understand exactly what is done now. Nothing too hard for builder with some experience Some pictures below |
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#36
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Looking Sweet :-)
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#37
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Thanks Retunga. Maybe you can answer my question
The hinge nr 4 is is supposed to be glued to the sides of the arm 1. What is the angle of the cut line of the hinge 4 in reference to arm 1? It is almost non seen in instruction Thanks |
#38
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Hi Boris
Looking at my model and by memory, if you have the opening of hinge 4 running close to parallel to the main hinging point that connects the cab you should be good to go. R |
#39
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Thanks Retunga
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#40
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Hello everybody
A small update. Started with scratch built parts. First, small preamble. I found many pictures of this and other excavators of similar size. All of them had their top and bottom plate of the boom and stick protrude beyond the sidecheeks. As far as I can understand it, this protrusion is needed to easily weld the parts together. This model does not provide for this protrusion. So... I will make it by myself. I printed out a sheet of paper filled with orange color. Then I glued narrow cardboard strip (actually it was a side piece of cereal box) along the long side of the sheet. After everything was dry, I sliced 2mm wide strips from this sandwich, edge painted and glued these on the side cheeks of the boom to simulate this protrusion. Then I switched to hydraulic lines. The lines in this model are given as flat strips of paper. Surely I could not do this So, had to find tubes... Small diameter tubes were exact diameter as PVC laminated medium sized paper clips. The donor for larger tubes was found in my daughter's bracelet making set. My daughter kindly donated one of the long tubes which was exact diameter of the larger hydro line and the same internal diameter of the paper clips. So, I made the bases for these tubes as proposed by designers. Then I've cut small 1cm long wires from the wire that I pulled from the laminated paper clip. Then I glued these wires on their places on the bases. Then the bases were covered by corresponding covers. Then I cut the tubes to length, painted black with permanent marker, simulated the press fit connectors by 4mm wide aluminum foil strips. And then I had to devise a "collector" to which the lines will connect inside the engine bay. Found some copper wire at home that fit internal diameter of the lines, formed them to correct shape, soldered them together and colored them black with permanent marker. Looks acceptable. Then I started to assemble the things together. Result is seen on picture. More hydro lines will come later I will take about 3 weeks off on this build, going for family vacation in USA. |
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