Ardumower 2.0 chassis from the 3D printer

[raess]

@Paddy Let me get back with the dimensions after work tonight.
Yes I have have uploaded the upper body on thingiverse. This is still a work in progress, so I update when I do updates..

3D-Printing. I have Printed a protoype in PLA. Which is not recomended for outdoor usage. Later on I will do print with ASA+.
For the upper body I think the consumption is around less then 3kg. I usally dont count consumption since I always have a stock at home!
-Support structures are needed!
-I am printing with a 0.6 mm nozzle, 0.28mm layers. always printing with skirt. infill hard to say, since I have not tested to print with ASA yet (but around 15% would suffice I guess)

@Bernard, Many thanks! The receiver coil for perimeter will be placed in front. Still working on this. I am designing a new front bracket for wheel, coil perimeter and the Bumper-Duino.
The body will have two screen options, one in the back (bigger) and adjustable to which screen you use. The PCB lid will come in two versions. One with a small LED and one without.

/RF

 

[bernard]

I Don't know exactly what kind of firmware you want to use but you can consider this:
Maybe the possibility to put 3 receivers,center,left and right.
Azurit need one center coil.
Raindancer need 2 ( left and right coil ).
And the result is that raindancer is better into mowing behaviour by using the 2 coils and rotate in the correct direction when reach the perimeter wire.
But Azurit one coil work better in tracking mode, the due can run faster in the PID wheel speed correction (reading the perimeter is not really fast).
By.

 

[raess]

@bernard The mounting bracket will have 3 places to mount the perimeter receiver, so the user can place center or side-side or all.

Here is some dimensions of the body

Attachment: https://forum.ardumower.de/data/media/kunena/attachments/4372/size1.jpg/

 

[paddy]

Hi,

Thank you for this detailed dimension drawing.
Did you complete your build so far? It would be very interesting to see it moving around.

 

[ronny]

How far has this project actually progressed?

MfG Ronny

 

[roontoon]

@micserver
Thx! At the moment the Fusion360 project will remain closed. I will share the STL files of the parts I am happy with. I need to complete the assembly and do some revisions and then I will publish the Fusion360 source. Hope that´s allright!

Cheers

Hi just found this post. I too am designing a 3d printed body for a 4 wheel Ardumower. When will you publish your source? Would love to look at some of your design techniques. Also is there build instructions to this design? Great work!!!

Dan

 

[bernard]

Hi.

He has two mower discs, in the battery compartment also fit two batteries

On the PCB1.3 the motor driver for mowing use the 2 outputs so how did you manage 2 mowing motor ??


BY.

 

[romualdas]

It is a single P37 connector (2 pins) used for motor on PCB1.3.
I assume it should be safe/ok to connect two motors in parallel for that matter.

 

[bernard]

Hi.

I assume it should be safe/ok to connect two motors in parallel for that matter.

With motor from the shop it's not a good idea to connect 2 of them in parallel the sense can burn the motor driver :woohoo: .
And with 2 motor in parallel it's not possible to manage correctly the motor sense.

Certainly need to remove the driver and make a new small board, or use 2 smaller motors and the 2 output of the driver. ??

By.

 

[romualdas]

Ah, yes, indeed.
Though the driver should be able to handle 2 motors by itself.
It can handle 3A normal and up to 5A per channel (ref.: https://www.pololu.com/product/1213). Means extra board to connect to mowers.

 

[romualdas]

Anyone has looked into how to connect two mower boxes with PCB 1.3?

 

[bernard]

Maybe you need to open a new thread On How to connect 2 mow motor on PCB1.3 for 2.0 chassis.

I don't know your electronic knowledge but maybe 2 L298N and 2 INA169 for current feedback can help https://www.marotronics.de/Motortreiber-L298N-Dual-H-Bruecke-Motor-Treiber https://www.marotronics.de/INA169-Analog-DC-Current-Sensor-Breakout-60V-25A-5A-Marotronics

or directly 2 single MC33926
https://www.marotronics.de/Pololu-MC33926-Motor-Driver-Carrier

 

[raess]

So after trying to export this project into a f3d file it seems it can't be any linked components within the assembly file when exporting.
I will share this project like this: https://a360.co/2uxsoyK you can then download a fusion 360 archive file.

Please note that the fusion 360 archive file will create a lot of different parts (so start a new project folder and upload this file there)


Please also remember this project is licensed under the Creative Commons - Attribution license with Attribution Robin Fröjd and Ardumower.de
https://creativecommons.org/licenses/by/3.0/

 

[jussip]

Robin, thank you for sharing this.

Is anybody done charging station?

 

[keeev]

Great Job Robin.

Do you share your MockUp of the charging station? It's the last part I need for my mower.

Best Regards

 

[raess]

Thanks.
Yes I have. https://a360.co/2S4ffMl Nothing fancy yet.

/RF