Crane Construction Part 2

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Undercarriage               about 2584 parts1 XL motor         Driving1 XL motor         Outriggers1 M motor         Steering5 M motors        Stamps Crane construction      about 854 parts1 L motor           Sliding mast1 XL motor         Slide outcounter weight1 XL motor         Mast up-down Crane mast                    about 1609 parts1 L motor           Turning mast  1 rechargeable battery4 IR receiverExtension wires short and long1 Actuator Firgelli  L12-EV3-100 Undercarriage long 1000 mm Crane height 1800 mm9 axes which 5 steerableCounterweightslide out (2x 500 gram lead grain) 70x40x35 mm
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MOC-7911

Name Crane Construction Part 2
Designer peteria
Designed 2017
Parts 856
Theme Technic
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Building Instructions For Sale

This is a Premium MOC, and the instructions to build it are being sold by the designer (peteria)

You will receive building instructions of type 3D File - LEGO Digital Designer LXF from the designer once you have organised payment with them.

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Use LEGO Digital Designer to open these files and generate step by step building instructions.

Submitted by nigel1975 PRO Sept. 9, 2018
View from above at 3m.

This has become the biggest Technic project I have embarked on (I still have to complete the pneumatic setup)
Submitted by nigel1975 PRO Sept. 9, 2018
With the Y guying the luffing jib is remarkably stable at 3m height. The jib angle and hook can be controlled easily and very light loads can be lifted.
Submitted by nigel1975 PRO Sept. 9, 2018
Here's what the structure looks like after modifications
Submitted by nigel1975 PRO Sept. 9, 2018
The original winch and L motor is removed, which means I can relocate the sbrick to give more space for the counterweight to retract.

Here the front winch operates the main crane hook, the middle operates the jib hook, the rear operates the angle of the luffing jib.
Submitted by nigel1975 PRO Sept. 9, 2018
One, two or all three winches can be engaged via the sliding switches.
Submitted by nigel1975 PRO Sept. 9, 2018
This is my MOD for a total of three winches operating off one L motor (one sbrick channel). Beneath the spools are 6 D cell batteries for the counterweight.
Submitted by nigel1975 PRO Sept. 3, 2018
Here you can see most of the exterior changes I made.

For counterweight I did not use a lead weight, I used old batteries (100's laying around from use on Lego projects)

You can also see position of PF switch for raising/lowering the boom.
Submitted by nigel1975 PRO Sept. 3, 2018
At small to moderate extension, ~80deg angle, with counterweight  (~800g) extended... the winch lifts just over 1kg. At the height shown the winch started to pull itself apart and exploded into a mess of string (a 20-minute mess of knots to unravel)
Submitted by nigel1975 PRO Sept. 3, 2018
Zoom of heavy duty actuator. The L motor is built into the actuator and the Technic gearbox really helps to prevent the actuator tearing itself apart.
Submitted by nigel1975 PRO Sept. 3, 2018
When I purchased the instructions it came with a separate LDD for heavy duty actuator. I did not build the original actuator so cannot comment how they compare.
Submitted by nigel1975 PRO Sept. 3, 2018
To save space I used an sbrick for four of the PF functions: rotate, boom extend, winch and counter weight.

Enough room left to squeeze in another winch for Y section later...