Posted 20 November 2012 - 04:10 PM
Thank you both for the input. I am currently making somewhat of a cross between the two in LDD, but won't know if the geometry will work before I try it IRL in a couple of days! If I have to do too much redesigning, I will probaby go with just one. Making the steering with LA's instead of the wormdrive directly on the turntable, actually frees up a lot of space up front!
Thank you very much!
Edited by D3K, 20 November 2012 - 04:11 PM.
Posted 23 November 2012 - 03:19 PM
I've pretty much redesigned the whole thing;
-Replaced to M-motors with L-motors (for manipulating the digger)
-Placed all 5 motors in the rear
-Relocated and redesigned the pivot on the steering two studs forward, to accomodate
-Steering, which is now via two small LA's (thanks to Jorgeopesi for tips on the geometry )
-Made the entire thing two studs wider
-Rebuilt the entire front to make it "cleaner" and stronger (now one stud longer)
-Lowered the front turntable by one stud
-Added pendular suspension to the rear axle
-Finally got the right tyres to go with my big rims!
Still have to:
-Make a better digger, with better geometry (megablocking Z-link)
-Maybe make a custom bucket, as the project is turning out bigger than anticipated.
-Build a new driver's cabin
-Make the whole thing more presentable
-Make better looking wheels (yellow stuff on the way)
But all the mechanical features are present and working, and for me that is the most important thing!
Posted 23 November 2012 - 04:06 PM
Edited by Ricecracker, 16 April 2013 - 10:19 PM.
Posted 27 November 2012 - 09:21 PM
Getting there.. the Z-link is almost working like I want it to, will make one last effort to improve it in the next couple of days.
Some aesthetic stuff to do, and then I will make a video of all the functions
Need to finish this soon, as it is taking up too much space!
Posted 30 November 2012 - 12:47 PM
However, something completely different to help me get a way way way better video this time:
Fits my phone nice and snuggly, the 4L axle with stop is just above the shutter button, and has a QD interface for the tripod, built using misc. 1/2 thick beams and stuff! Worked great, as you will see in the video shortly!
EDIT: And here is the video of the swingloader:
Edited by D3K, 30 November 2012 - 01:00 PM.
Posted 20 March 2013 - 03:04 PM
Have finally got my hands on several micromotors (6 of them, and at a ridiculously low price compared to bricklink), so will use at least one for rotating the head of the boom.
Got an idea for steering with servo motor + pf speed remote that I will try to build irl tomorrow.
Anyway; here's what I made in LDD, and will try to get a vid of the boom as it is now, up tomorrow (It is roughly similar to the one modeled (at least externally), but also features extending via a PF-L motor inside the housing. The gripping will be powered by a PF-M motor housed in the rear of the extending part. The turning is done by a micromotor)
Posted 20 March 2013 - 03:24 PM
I am looking forward to seeing the 'head' of it,It will be interesting to see how you use the micromotors.
Posted 25 March 2013 - 04:48 PM
Very true, was done in a couple hours.
And then a couple of hours to build the model, figuring things out as I went along:
Dimensions and critical components are identical to the LDD. Had to do some minor tweaks to the steering motor setup, as well as the Ackerman setup and the connection to the two big LAs..
I was gonna use racks and gears for the gripper, but then saw Sariel had already done that, so I tried something else. This gives it a lot less range, but a helluva lot more power. I know containers come in different lengths, but this stacker is made only for 25 +/- 1 stud long containers
Here is a cutaway of the boom, to show it's internals:
When it's closed up, 1x11 beams between the top 3x11 curved panels keeps it nicely in place.
The wires curl up nicely as it retracts, and are just long enough for it to extend fully (like in the picture).
Other noteworthy things;
-Driven by XL-motor by PF Speed Remote
-Steering by one PF-M motor.
-Raising boom by one XL motor
-Extending boom by one PF-L motor
-Gripping by one PF-M motor
-Rotating the head by one micromotor
-AAA battery box underneath, that can easily be pulled out
Posted 26 March 2013 - 02:18 PM
You never know when you're digging away, and all of a sudden you do something embarassing and just want to bury yourself underneath a heap of earth.. with this feature; THAT'S A POSSIBILITY!!
Anyways, new project:
Teaser of what's to come withing the next couple of hours:
Posted 16 April 2013 - 09:47 PM
The turntable is a dead giveaway.. yes, it's going to be an excavator And yes, it's going to be motorized.
The plan is to have one batt box and four motors in both the chassis for drive, steer, blade and rear outriggers. And then a separated system of PF elements in the superstructure for the usual excavating stuff.
While designing this, I made an ackerman steering solution, that allows the wheels to pivot inside the rims! It wa pretty simple, so it has probably been done before, but I can't remember having seen it anywhere,,
Posted 16 April 2013 - 11:31 PM
Posted 03 May 2013 - 04:20 PM
Opted for a design without suspension, to make it simple and fast.
Some fine tuning to do, and then build a body for it, maybe a better version of my last (failed) attempt at a "car":
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