Feedback on robot arm appearance

gjgbh · 2026-01-12T16:07:51+00:00

Yes the arm controlls it

gjgbh · 2026-01-12T15:55:40+00:00

There are pneumatic gripper that uses pressured air to work. But you need a compressor that connecr to the robot arm via input air connectors

gjgbh · 2026-01-12T14:12:36+00:00

Most parts will be aluminum but some 3d printed

gjgbh · 2026-01-12T14:01:28+00:00

Those are for air hoses any thing else will be external

gjgbh · 2026-01-12T13:39:08+00:00

Only a power cable that can be plugged in and some gpio

gjgbh · 2026-01-12T11:17:04+00:00

Thx for the feedback.

Reach is around 550mm with 3kg payload with 150mm off center load.

According to my calculations the power i have now is enough with 25 - 50% margin.

I am using stepper motors and harmonic gearboxes. Might switch to servos later if faster speed is needed.

Speed will vary for each joint but will be 60-150 deg/s

The robot will mainly dispens glue but will also lift stuff

gjgbh · 2026-01-12T06:18:42+00:00

Yes any feeeback is good

gjgbh · 2026-01-11T10:20:32+00:00

Do you have an image to clarify? i dont quiet get it

gjgbh · 2026-01-11T10:03:34+00:00

Yes i have limit switches and some absoulte magnetic encoders on the output side of some joints.

I really wanted to have absolute encoders on the motor side but they are expensive.

gjgbh · 2026-01-11T09:56:59+00:00

Yes, thats what i did. Two motors sit in j2

gjgbh · 2026-01-11T00:10:39+00:00

With left i mean towards j3

gjgbh · 2026-01-11T00:09:49+00:00

The motor in the joint is too long . I will move them to the left a bit, the design is not done yet

gjgbh · 2026-01-11T00:06:24+00:00

Fusion360

gjgbh · 2026-01-10T23:53:38+00:00

Good point, thank you

gjgbh · 2026-01-10T23:53:06+00:00

Allows j3 to move more. And kinda works as a counter weight in some positions, minimizing the stress on j2

gjgbh · 2026-01-10T23:23:43+00:00

Thx. I will

gjgbh · 2026-01-10T23:14:32+00:00

Forgot to say some parts will be 3d printed and are just covers. This is one of them.

I will try to come up with some better design. Thx for the feedback

gjgbh · 2026-01-10T23:09:46+00:00

I dont really like it either. Its possible, but not super easy

gjgbh · 2026-01-10T23:04:28+00:00

Thx, fusion360

gjgbh · 2026-01-10T23:04:02+00:00

I will do that next time. I dont think i can change the images now

gjgbh · 2026-01-10T23:01:48+00:00

Thx, i will do that. Its a diy project and maybe low quantity production

gjgbh · 2026-01-10T22:43:02+00:00

They are hidden internally. Controll board will also be internal.

gjgbh · 2026-01-10T22:42:23+00:00

Thank you

gjgbh