Aleksandr Dobkin (@a

Aleksandr Dobkin

162 posts

Aleksandr Dobkin

@a_dob

Santa Clara, CA

Joined August 2010

Pinned
Aleksandr Dobkin
@a_dob
Jan 2
Meet A-750, my new 6-DoF robotic arm built from the ground up: ☑️ 750 mm reach 🤛 ☑️ 1.5 kg payload 🏋️‍♂️ ☑️ 1 kHz on-board control. Great for teleop 🤌 ☑️ 0 external wires 👑 Available now exclusively in the SF Bay Area 💰 $2,000 for the first 5 units 📩 DM to order or learn more
00:00
1.1K
Aleksandr Dobkin
@a_dob
Aug 23, 2024
Update: we're passing the potato chip test. The motor is being operated in torque control mode at 10hz. Torque setpoints are calculated to cancel gravity based on the current joint angle and previously derived masses and centers of mass of the two links.
00:00
78K
Aleksandr Dobkin
@a_dob
Aug 6, 2024
Working on a twist capsule design for robotic joints. This is a device that let's you compactly run a cable through a limited rotation joint. Use this when you don't want to expose cables outside the robot chasis. Yay or nay?
00:00
23K
Aleksandr Dobkin
@a_dob
Jul 2, 2024
Update: burgerbot demo is complete Would you eat a burger made by a robot? 🧐 cc @_buildspace @_nightsweekends
00:00
9.5K
Aleksandr Dobkin
@a_dob
Aug 9, 2024
Testing how well the twist capsule works in practice. When the cable inside the twist capsule is all wound up it wants to unwind. This exerts a small position-dependent torque on the joint. PID feedback appears to be compensating well for this unmodeled force
00:00
5.3K
Aleksandr Dobkin
@a_dob
Jul 27, 2024
Introducing the burgerbot. It's a machine that makes burgers using a robotic arm and a griddle. - place burger patty on griddle - flip - serve Sign up for the wait list at bit.ly/3XTad5R cc @_nightsweekends @_buildspace
00:00
7.5K
Aleksandr Dobkin
@a_dob
Jun 27, 2024
Update: Freezer opening and closing mostly working cc @_buildspace @_nightsweekends
00:00
4.7K
Aleksandr Dobkin
@a_dob
Mar 15, 2024
Achieved a personal milestone on the path to autonomous burger preparation. I taught this robot to flip a toy patty reliably. Using tech from ALOHA, GELLO, and Annin Robotics. @tonyzzhao @philippswu
00:00
4K
Aleksandr Dobkin
@a_dob
Jul 17, 2024
Update: first draft of burger extraction and placement maneuvers @_buildspace @_nightsweekends
00:00
2.2K
Aleksandr Dobkin
@a_dob
Jul 9, 2024
I'm launching the burgertbot! Sign up for early access or if you're interested in fielding a unit at bit.ly/3XTad5R cc @_buildspace @_nightsweekends
00:00
1.8K
Aleksandr Dobkin
@a_dob
Aug 2, 2024
Update: Got the GIM6010-8 up and running. It was pretty smooth out of the box for constant velocity motion like this but needed to be tuned for position control
00:00
2.2K
Aleksandr Dobkin
@a_dob
Jun 28, 2024
Update: collected 50 teleop examples for the patty extraction task cc @_buildspace @_nightsweekends
00:00
2K
Aleksandr Dobkin
@a_dob
Aug 23, 2024
Replying to @a_dob
Correction: it's more like 100hz, not 10
3.1K
Aleksandr Dobkin
@a_dob
Aug 21, 2024
Update: Hardware build of the wrist is done. Time to get back to software
1.4K