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PAROL6 Desktop Robot Arm

github.com

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Re: PAROL6 Desktop Robot Arm

#11

Post by monkmartinez »

sgnelson wrote: post #5

I wonder how this compares to the AR4 robotic arm ( https://www.anninrobotics.com ). The AR4 isn't truly hardware open source, but my understanding is that it's software agnostic. My biggest question is the full cost for the PAROL6. Their BOM link is 404. I can build the AR4 completely for less than $2000, and for education, that's a very small price for a semi-useful, full 6 axis arm. (Currently, to give a compariso…

Here is the link to the most recent BOM: https://github.com/PCrnjak/PAROL6-Desktop-robot-arm/blob/mai...

Re: PAROL6 Desktop Robot Arm

#12

Post by RobotToaster »

sgnelson wrote: post #5

I wonder how this compares to the AR4 robotic arm ( https://www.anninrobotics.com ). The AR4 isn't truly hardware open source, but my understanding is that it's software agnostic. My biggest question is the full cost for the PAROL6. Their BOM link is 404. I can build the AR4 completely for less than $2000, and for education, that's a very small price for a semi-useful, full 6 axis arm. (Currently, to give a compariso…

>The AR4 isn't truly hardware open source

Being pedantic this isn't either, there's no CAD source files, only stl files. Hopefully that's just an oversight.

Re: PAROL6 Desktop Robot Arm

#14

Post by unwind »

ilaksh wrote: post #8

The instructions detail everything including the exact screws/nuts needed. EXCEPT the most important parts, the actual motors! It doesn't give any specs or names or a thing for those. Incredible. Also the BOM info is gone.

Another poster mentioned the BOM link, it's 6 NEMA 17s of various torque ratings.

Re: PAROL6 Desktop Robot Arm

#15

Post by qingcharles »

RobotToaster wrote: post #12
sgnelson wrote: post #5

I wonder how this compares to the AR4 robotic arm ( https://www.anninrobotics.com ). The AR4 isn't truly hardware open source, but my understanding is that it's software agnostic. My biggest question is the full cost for the PAROL6. Their BOM link is 404. I can build the AR4 completely for less than $2000, and for education, that's a very small price for a semi-useful, full 6 axis arm. (Currently, to give a compariso…

>The AR4 isn't truly hardware open source Being pedantic this isn't either, there's no CAD source files, only stl files. Hopefully that's just an oversight.

For someone that hasn't used a CAD package in 30 years, can you explain the importance of this for me? Is a STL like a JPG is to a RAW in a camera?

Re: PAROL6 Desktop Robot Arm

#16

Post by beachy »

qingcharles wrote: post #15
RobotToaster wrote: post #12

Earlier quoted context omitted.

>The AR4 isn't truly hardware open source Being pedantic this isn't either, there's no CAD source files, only stl files. Hopefully that's just an oversight.

For someone that hasn't used a CAD package in 30 years, can you explain the importance of this for me? Is a STL like a JPG is to a RAW in a camera?

More like source code vs object code in a compiled computer program.

Re: PAROL6 Desktop Robot Arm

#17

Post by sterlind »

qingcharles wrote: post #15
RobotToaster wrote: post #12

Earlier quoted context omitted.

>The AR4 isn't truly hardware open source Being pedantic this isn't either, there's no CAD source files, only stl files. Hopefully that's just an oversight.

For someone that hasn't used a CAD package in 30 years, can you explain the importance of this for me? Is a STL like a JPG is to a RAW in a camera?

STL is to CAD as JPG is to SVG basically.

Re: PAROL6 Desktop Robot Arm

#18

Post by RobotToaster »

qingcharles wrote: post #15
RobotToaster wrote: post #12

Earlier quoted context omitted.

>The AR4 isn't truly hardware open source Being pedantic this isn't either, there's no CAD source files, only stl files. Hopefully that's just an oversight.

For someone that hasn't used a CAD package in 30 years, can you explain the importance of this for me? Is a STL like a JPG is to a RAW in a camera?

An STL is just a mesh, a collection of joined up points. It's like exporting a JPEG of a word document, you can print it but editing is a huge pain. For instance STLs don't support curves, so they're approximated with lots of short lines.

Usually CAD interchange is either in STEP or the program's proprietary format.

Re: PAROL6 Desktop Robot Arm

#19

Post by krasin »

Vespasian wrote: post #4

Interesting project. I wonder how the rigidity holds up over time. Working at a robotics company, the mechanical engineers had to overcome quite some challenges to find a compromise between, precision, speed and repeatability. And that was with a metal frame.

My biggest concern is that they use screws over plastic as fasteners: https://github.com/PCrnjak/PAROL6-Desktop-robot-arm/blob/mai...

Quote from the manual:

> Screws are in this example M3 screws and holes are undersized to 2.7-2.8mm that means that when we screw in the screws we are tapping holes in 3D printed parts.

> There are multiple benefits to this:

> ● Connection is strongest compared to tapping holes with a tap or using brass inserts

> ● It is simple and fast

> ● No need to prepare the hole, it can be printed undersized

> Cons are that you can’t disassemble it a lot of times. In case you feel screws slipping in the hole. Put some super glue in the hole and wait for it to cure. After that re tap the hole.

Re: PAROL6 Desktop Robot Arm

#20

Post by Arcanum-XIII »

sgnelson wrote: post #5

I wonder how this compares to the AR4 robotic arm ( https://www.anninrobotics.com ). The AR4 isn't truly hardware open source, but my understanding is that it's software agnostic. My biggest question is the full cost for the PAROL6. Their BOM link is 404. I can build the AR4 completely for less than $2000, and for education, that's a very small price for a semi-useful, full 6 axis arm. (Currently, to give a compariso…

I’m curious, what kind of project could you do once you built it ?

My major issue is that I can easily build stuff. The puzzle keep my brain on the job - but then I don’t know what to do after I’ve checked it works :D (i.e my various RC project are there, but then what ? I’ve built a rover, can do some automated stuff, but not very useful a the end…)

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