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Project robot lawnmower

Posted: Thu Feb 01, 2018 7:31 am
by Raess
Now I have had my printer for a few weeks, it's time to test something big.
I'm building a robot lawnmower.
So this thread will be updated during the course of the project.
First concept:
IMG_1598.jpg


Second concept models:
3d.jpg
2a.jpg


This part is now printing in a scaled down version to check the body. For real size 585mm Z the print time is around 132H with 0,25layers. And about 2KG PLA.
2.jpg

IMG_1599.jpg



Some hardware specs for the build:
Jetson TX2 Development Kit
Scanse Sweep
Intel® RealSense™ Camera ZR300
2x DC Planetary Geared Motor 24 Volt med Hall IC 30-33 RPM 8mm
2x Vapex Li-Po Battery 6S 22.2V 4000mAh 25C XT60
SparkFun 9DoF
RoboClaw 2x45A ST
Emlid Reach — RTK GNSS modules

(Mower motors for the blades I have not decided yet.)

Welcomes feedback and ideas.

Re: Project robot lawnmower

Posted: Thu Feb 01, 2018 11:22 am
by Raess
First test print ready. It loooks Good.
BAB77CEE-788B-46E5-A36A-FAB9775FEB69.jpeg

8DA1F0C6-2F10-444E-B129-1C23FB0D4D25.jpeg

8AC3A366-B539-4471-BA9A-D3C3412167FE.jpeg

Re: Project robot lawnmower

Posted: Thu Feb 01, 2018 5:49 pm
by zemlin
I'm not sure about using PLA for something like this. It will be out in direct sun, plus with the heat of the motors and electronics - PLA parts might twist up on you with the heat. Looks like a great project though!

Re: Project robot lawnmower

Posted: Thu Feb 01, 2018 6:15 pm
by Raess
@zemlin yes i Know. I had some PLA at home so I was thinking to print first concept with it. Later on I think I will go with ABS. Or do you have any other suggestions?

Re: Project robot lawnmower

Posted: Fri Feb 02, 2018 1:24 am
by Michael.P@Raise3D
I think ASA might work better for this project over ABS. Still cool as all hell though!

Re: Project robot lawnmower

Posted: Fri Feb 02, 2018 7:49 am
by Raess
Thanks Michael. ASA seems to be a bit expensive and I can only find 1kg roles where I use to shop. :/ But i will keep looking.

Some updates on the body.
1. Added holes for motors to be installed with mounting disc (this way I can change sizes and types without printing the entire body again.)
2. Added reinforcement beams cross body and made place for a steel beam in them.

hello.jpeg



printing a small test body again :)

Re: Project robot lawnmower

Posted: Fri Feb 02, 2018 10:02 pm
by Raess
So the small test parts are done after 9h.
DDA6AE1B-FD3F-46A0-A1C3-4444DEA0CBD7.jpeg

7891ADF4-EF28-448A-B808-7DD32A5BBEF4.jpeg


Overall it looks quite good. The parts seems to fit quite nice. Did not yet remove all support and other stuff before the pictures.

Next week I think I will test a full size half, due it’s hard to actually see details with this small print.

Re: Project robot lawnmower

Posted: Sat Feb 03, 2018 12:50 am
by Timber Haint
Looks good!

Re: Project robot lawnmower

Posted: Sat Feb 10, 2018 11:03 pm
by Raess
So partly printed half of the body in full-size before my printer failure (viewtopic.php?f=2&t=6442)

I am happy with the result of the partly printed part. I will make some small adjustment before trying to print full-size again.

IMG_1749.jpg

Re: Project robot lawnmower

Posted: Sun Feb 11, 2018 12:27 pm
by Raess
So i tried to print some small parts to get started again with the printer after the errors.
So I printed Some motormounts to test how everything fits together. Like a glove! :)

IMG_1754.jpg

IMG_1756.jpg

IMG_1757.jpg

IMG_1759.jpg

IMG_1760.jpg

Re: Project robot lawnmower

Posted: Tue Feb 13, 2018 10:58 am
by Raess
So after printing some parts I realized, first of all, it looked like any lawnmower out there. So I had to go back to the drawing board and start from scratch. I wanted a unique look that looked fresh and futuristic. I also took some experience from the previous one and made improvements.

So here is how it looks now:

1-1.jpeg

1-2.jpeg

1-3.jpeg

2-4.jpeg

halfnaked.jpeg

Re: Project robot lawnmower

Posted: Sun Feb 18, 2018 11:52 pm
by isabellamg
It looks perfect, looking forward to the finished product.

Re: Project robot lawnmower

Posted: Mon Feb 19, 2018 8:47 am
by Raess
Thanks isabellamg. Ones I have tuned in the PETG filament. Printing of parts will begin. :)