Week 17: Mechanical design/Machine desing

group assignment

HERE You can see what the queretaro lab did on the fablabpse machine design week

make a machine from scratch

individual assignemnt

document your work on the group assignent

group assignment

Here you can see the whole machine documentation

individual assignment

this was a tough week because we were hurried to work as a team during the contingency.

fortunatly we have all the resources available to make the design and planing from home.

divide and conquer.

during this week had several meetings through microsoft Teams platform with all of the students in ciudad de mexico FabLab.

First thing that was on disussion was to decide what our machine was going to do. Found some interesting ideas.

ideas

1.-pen plotter

2.-wire bending

3.-cam slider

4.-gigant pantographer

5.-strandbeast/vertical plotter

at the end we decided to do a cam slider.

here we end up the first meeting and i made some paper scketches for my iedas.

hand sketches

and draw them on solidworks first as a draft.

first solidworks draft

Then on the second meeting we look at what resources we had at hand in our labs (ciudad de mexico and Queretaro).

and we concluded that we needed to use 1 stepper with a linear actuator and 1 regular stepper 2 stepper drivers one for each motor and a cnc shield integrated to an arduino uno to make it move.

version 2 without the dc motors with encoder

Then,We divide the machine in parts so we all could contibute in the best way.

So my contribution to the Fab-Lapse (that's the name we decided to go with) was the mechanical design for the first stage. An then work with the mechanical team of the second stage to define all of the CAM files.

version 3 without the timming belt and pulley system

in ciudad de mexico decided to go with a chassis made out of laser cutted cardboard.you can find the CAM files for that design in the group assignment page.

cardboard fab-lapse design

but i tought to make it a little more roubst and made a design out of 6 mm acrylic laser cutted as well.

acrylic fab-lapse design

then for the third meeting we talked about to take out the timming belt on the rotary stage and place the camera right on the shaft of the stepper using 3D printed parts.

timming belt and pulleys system that didn't make the final cut

and put instead a marble like bearing system we found some reference on a FabLeon 2019 machiune design week

lazy susan with marble like bearings

then i did a 3D printed Threaded base to place a profesional camera or a generic mount for a phone

section view of the assembly

then i modeled a 3D printable support for the shaft of the linear actuator

cross section of the linear actuator shaft support

in the "REFERENCES" section at the bottom you will find the original files for my final version before y toss it to the next team.

as well as some fabrication files i have done for when we could get back on the lab.

I uploaded the assembly into 3D content central from dassault sistemes page and pasted the cod into this page so you can view it and download it

Descargar

this is a screenshot if the pieces we design here in queretaro

And this are the settings we used on those prints

i'm sorry don´t have a hero shot on this but this was printed during quarantine and this pics died with my former laptop i was using at the time.

Now on 2022 rodrigo came to queretaro and picked up the machine to start programming the electronics and designing a chasis for the electronics and wiring

taking the assignment from were jonathan,jorge javier and i left.

This is as far as the fablabqro got

printed some parts during covid quarantine

cutted the chassis as soon as we came back to work at the fablabqro

then assembled the machine to test the fittings

this is the final pictures of the machine fully assembled.

in mexico designed and manufacture the case for the electronics, the programming and wiring of the boards

this is a video taken from the ciudad the mexico group assignemnt repository were the assignment was finished

this is the first timelapse taken with the machine

REFERENCES

here i will link the documents on this week assignment and tutorials.

HERE i recomend you download this app to model all the fasteners.

HERE is the best catalog i know for 3D gears,sprockets and pulleys.

HERE is the second best.

HERE download the datasheet for the stepper with linear actuator 17LS19-0406E-300Y

HERE download the datasheet for the regular stepper motor 17HS19-1684S1

HERE download the datasheet for DC motor with encoder of the version 1 mod.

HERE download the original solidworks2019 and STL file for the stepper with linear actuator

HERE download the original solidworks2019 and STL file for the regular stepper

HERE download the file for the dc motor with encoder of the first version.

HERE download the orginal solidworks2019 files for the 6mm acrylic chassis

HERE download the original solidworks2019 files for the base os the second motor

HERE download the DXF file for lasser cutting all the pieces in 6mm acrylic

HERE download the STL files for 3D printing.

HERE hopefully i can push the remaining files of the assembly.

HERE 3D pdf file of the assembly (you'll need to activate this function on your machine in order to see it).

HERE For background this is a machine design week that did another cam slider called hello_dolly

HERE this is an idea that i worked the tab and fasteners features in the acrylic cut layout.

HERE this is a machine design that also includes that kind of tabs

HERE this is a machine design week page that gave me the idea of using screws in order to fix the bearing to the frame.

HERE here's an idea of the lazy susan bearing taken from falab leon in fabacademy 2019

HERE is a tutorial on how to view 3D parts in a web page (for solidworks as i know)

HERE you can see inspiration for this machine

HERE is anther video for a DIY cam slider