Collab 2020: Modeling Heavy Equipment (Backhoe)

Collaborations
Kent Trammell

Accomplishing a BIG project TOGETHER

Starting in March 2020, I began a large stream project to model a comprehensive, highly-detailed Caterpillar 434E backhoe. Please watch the first stream (first 3 minutes of abridged version at least) for an overview.

It's a straight-forward project of building a complex model over an extended period of time. The spin on the project is that I want your help to accomplish it! If I build some parts and you build some parts, we will finish this thing much quicker. Plus the contribution format will include reviews, the potential of having your piece(s) assimilated into the final model. Not to mention large quantities of XP are at stake 🤑

NOTE: This is an involved project reserved for Citizen members.

Collaboration Details

The general idea is that I kickoff stages of the project via live stream, which is typically once per month. For the time in between streams, you choose a piece of the backhoe and apply what you learned from the stream to that piece. For example, the first stream covered initial block out. So between stream 1 and stream 2, your job is to pick a piece and block it out.

This is the repeating protocol for each Assignment Period (between-streams):

  1. Signing up for pieces of the model. I will be maintaining a Google Sheet to organize piece selection and grading. Following this URL will give you the ability to comment. The sheet is sectioned vertically and color-coordinated with a backhoe image. To sign up for a piece, right click on an empty cell below your desired piece section and click "Comment" (CTRL + ALT + M). Comment your name or username and I will fill it in officially as confirmation.

    Remember that it is OK for multiple people to model the same piece. But lets try to have at least one person assigned to each piece before doubling up.

    2. Project file structure. We're going to use Google Drive as a means to sync a single working directory among all contributors. See this thread about details and how to get set up.

    3. Submitting your piece for review. Exactly one week before the next stream is scheduled to be broadcast, your piece is due. In the "Attempt" cell of the spreadsheet, paste a download link to your .blend file via Dropbox, Google Drive, or equivalent hosting service. This will earn you at least 10 XP each week.

    4. Review. On stream I will review each submitted piece and decide which will be assimilated into the master model (in the case of multiple submissions of the same piece). The purpose of the review is to generate feedback for you work and advice for improvement.

    5. Assimilation. If your piece makes the cut and is assimilated into the master model, your name / username will be added to the object in Blender. You will go down in history as a definitive contributor to this epic backhoe model!

    Once the model is completely done, I plan to render a short demo reel showing off the model and crediting all contributors. It should be a rewarding conclusion to all the work we will do!

Assignment Prompts

I will reply to this thread after each stream with a [big] assignment post denoted by a  📣 emoji in the title. There I will clarify instructions about each Assignment Period.

Online Resources

Reference Images

Livestreams


This is THE thread

We will centralize our collaborative communication between the streams and this thread. Ask any and all questions pertaining to the Backhoe project here.

  • Kent Trammell replied

    Ahh I was wrong about the engine closure taper. It thins toward the cab . Fascinating. Never would have guessed that without the top-down view. Great find @adrian2301!

  • adrian replied

    Ok everyone, There is so much going on in the DOG Pound it's getting a little unsafe around here, so I have managed to come up with some safety gear for everyone.

    @theluthier dostovel blanchsb jakeblended sshanr ketre spikeyxxx rryzen7 ddoulos4iesou duerer hellosudeepsingh ppfbourassa aartifact 

  • spikeyxxx replied

    Cheers Adrian! I appreciate that!

    (Nice 'The invisible man' reference,,,)

  • Shawn Blanch(blanchsb) replied

    Let's keep him visible this way we don't run over him LOL

  • Ingmar Franz(duerer) replied

    Maybe he (or she?) is a little bit shy😉?

  • adrian replied

    duerer I saw a post earlier from you about the axle attaching to the chassis, unfortunately I read it on my phone and couldn't reply, now I can't seem to find it, can you give me some directions. Thanks.

  • Ingmar Franz(duerer) replied

    I'm just trying to align the rear axle with the chassis and the wheels, but I can only make it fit with the one or the other. The red element of the rear axle has to be attached with 4 bolts on both ends to the chassis where 4 bolt holes are needed:

    I've created a smaller file with just the chassis, the rims/hubs and the rear axle here.


  • Ingmar Franz(duerer) replied

    I've updated it. You can find it below this post in the next reply section.

  • adrian replied

    I can adjust the chassis as needed no problem, if its lower, higher, left or right I can adjust accordingly.If you sort your wheels out and best guess the location of the bolt positions in relation to the axle and I can then adjust the chassis to fit. Probably the best approach, as the chassis will hardly be visible when done, as long it doesn't interfere else where not an issue. If we still have a problem then we can solve it then. The chassis has few images, only drawings that are not really clear, so it is more a task of align to other parts.

  • adrian replied

    That's great I can start on that file and update it and post it back.

  • Ingmar Franz(duerer) replied

    The inner part of the rim is a little bit of eyeballing since I only have photos of them but no construction drawings. The rear axle itself is based on isometric and orthographic plans but I don't have any precise measurements. And the connection with the front axle will be another tricky task.

  • Ingmar Franz(duerer) replied

    This is the connection between front and rear axle on a Cat 434F:

    I don't know whether there'are differences between the E-version and the F-version of the Cat 434 in that part of  the backhoe.

  • Karen Trevino(ketre) replied

    I love it @adrian2301, with all the boo boo's I've been experiencing that crash helmet is most certainly in order. @Phil and @spikey they fixed me up and got me headed in the right direction on discord earlier.  Woot! 

  • adrian replied

    The adjustment is done. LINK

  • shanr replied

    Hey ketre And hellosudeepsingh I've got an image for you guys

    And for spikeyxxx dostovel , rryzen7 and for me we get a image for the axle 

  • spikeyxxx replied

    Thanks shanr! Can't get enough images;)

  • Karen Trevino(ketre) replied

    Awesome @shanr  thank you so much

  • adrian replied

    Made a DOG TAG for the front of our Puppy, or we can hang it on the gate of the Pound.


  • Karen Trevino(ketre) replied

    Very cool @adrian2301 !

  • Ingmar Franz(duerer) replied

    Thank you @adrian2301 for the adjustment. Now it intesects with the battery boxes:

    It's maybe best that you keep your chassis as it was since we first have to ensure that both axles are properly connected via the parts in between. 

    I have found some higher resolution drawings of the chassis:




    I've also found some close-ups of the rear side: