See:

http://sampson-jeff.com/RosAgriculture/readme.txt
http://sampson-jeff.com/RosAgriculture/ros-agriculture-youtube20230104.txt

===
I: 02132017 Community Meeting (This is probably 02132018) https://www.youtube.com/watch?v=DaOLkhwJv0c
@08:35 - 24:30
08:35 Jeff: Shows his mini robot. (Raspberry Pi 2)
11:15 Jeff: Shows picture of his mini tractor. Plus compares the two. And compares to the Danfoss tractor.

===
I: 10052018 Lawn Tractor Meeting https://www.youtube.com/watch?v=ZUXZPf7lWzc Length 1:01:25
@42:15 - 47:15
42:05 Jeff: Shows his mobility scooter transaxle with a quadrature encoder installed.
      Sohin: Says he will send me a design for a 3D print mounting bracket.
44:00 Jeff: Shows some parts to create a steering system.
45:55 Jeff: Shows a motor that may work as a steering actuator.

===
Test of the transaxle with PWM drive.
https://www.youtube.com/watch?v=BGWBylsv4M0

===
I: 11302018 Lawn Tractor Meeting https://www.youtube.com/watch?v=Dlb5uq6DH4U
@43:30 - 45:15
43:30 Jeff: Shows parts that came in the mail.
      Go-cart steering parts.
      Dsicussion of robot weight.

===
I: 03152019 Lawn Tractor Meeting https://www.youtube.com/watch?v=SsqqjrB5-0U
@24:00 - 28:15
24:00 Sammy frame and steering and calibrating steer angle.

===
Steering wood front end with linear actuator. (too slow, too sloppy)
https://www.youtube.com/watch?v=nVqu_zhuoyA
https://www.youtube.com/watch?v=sf3b-k5RUCk

===
Welded front end. (this made it through to R/C servo control)
https://www.youtube.com/watch?v=l7Ps-Q_GHLE

===
I: 03292019 Lawn Tractor Meeting https://www.youtube.com/watch?v=-BewtBuwrtw
@00:00 - 5:55 Super200 with long arm
00:00 Sammy steering demo - R/C servo tester

===
I: 04192019 Lawn Tractor Meeting https://www.youtube.com/watch?v=1g_RNiwslh8
@11:50 - 15:25 Super200 with short arm
11:50 My talk about Sammy steering with Super200 servo (giant servo)
@20:50 - 22:30
20:50 Some complaints about the Super200 servo

===
I: 05042019 Lawn Tractor Meeting https://www.youtube.com/watch?v=Rvwysy3LqmI
@02:30 - 11:05
02:30 Sammy frame and electronics box
@30:00 - 35:05
30:00 Super200 servo rotation range discussion

===
I: 06072019 Lawn Tractor Meeting https://www.youtube.com/watch?v=Lwd8GMLVjTk
@13:20 - 22:30
13:20 Matt: Asks about Jeff's sloppy steering mechanism. Turns into discussion
   about the Super200 servo. Both for steering and speed control.

===
I: 09062019 Lawn Tractor Meeting https://www.youtube.com/watch?v=OkiRQByQnxo
@33:30 - 36:30 Super200 servo feedback
33:30 Jeff: Has soldered a feedback wire into his Super200 servo. Question about linearity in the steering linkage.
@38:05 - 42:30 Super200 "quality"
38:05 Matt: Talks about steering angle nonlinearity. Al's evaluation of the Super200 servo operation. Jeff comments on how to "fix" the Super200 servo.

===
I: 11052019 Community Meeting https://www.youtube.com/watch?v=Xr0XDVY8wpU
@00:00 - 10:20
00:00 Sammy with new steering servo. Replaced Super200 with DH-03X giant servo.
@13:10 - 15:40
13:10 Discussing hacking the giant servos to get position feedback.

===
I: 11082019 Lawn Tractor Meeting https://www.youtube.com/watch?v=QEmjFp3ymuw
@21:40 - 23:50 Description of the new open frame servo.
21:40 Jeff: Talks about new steering on his mini-tractor.

===
I: 03032020 Community Meeting https://www.youtube.com/watch?v=2wWV2jQtivQ
@00:00 - 06:50 Plots from motor control
00:00 Jeff: Is talking his main drive motor controller.
05:30 Jeff: Talks about steering.
@19:00 - 20:30
19:00 Jeff: Shows his robot.

===
I: 03062020 Lawn Tractor Meeting https://www.youtube.com/watch?v=sNavj1iZ5pQ
@32:30 - 40:00 An update on motor control, no load.
32:30 Jeff: Talks about his motor control.

===
I: 04032020 Lawn Tractor Meeting https://www.youtube.com/watch?v=o4sh_no8VLk
@36:55 - 55:30 Plots of motor after adding the 24v step up.
36:55 Jeff: Talks about adding a 12v to 24v convertor to his main motor. Shows graphs of motor response. Some comments on the steering servo. Comand and logging for motor testing (not through ROS).

===
The servo is DH-03X on Sammy.
I: 06122020 Lawn Tractor Meeting https://www.youtube.com/watch?v=OED92oZw9ts
@24:15 - 31:00 Discussion of different servos.
24:15 Doug: Asks about the giant R/C servo. Jeff wastes alot of time looking up the answer. Discussions about all of the different giant servos that are available. Spring on the transmission arm. 

===
I: 00000000 Lawn Tractor Meeting https://www.youtube.com/watch?v=KepqC3-hZqM
@12:50 - 15:40 Just an observation on the transmission handle.
12:50 Jeff: Talks about the tramission control for his lawn tractor. And a quick steering hack.

===
I: 08142020 (was 07142020) Lawn Tractor Meeting https://www.youtube.com/watch?v=nNi638_708g
@55:20 - 57:15 Had to play with the range pot.
55:20 Jeff: Talks about his steering on his mini-tractor (Sammy). Adjustment of the range pot on the giant servo.

======

Skipping ahead to new small robot...
https://www.youtube.com/@lawntractorautomation2726/videos
http://sampson-jeff.com/RosAgriculture/LawnTractorMeetingNotes.htm

Most meetings between 09/01/2022 and 02/02/2023 have demos of the new small robot.

12222022 ROS Lawn Tractor meeting
https://www.youtube.com/watch?v=ecwIJu_NSH8
@00:00 Jeff: Shows latest progress on his new steering.

20230126 ROS Lawn Tractor meeting
https://www.youtube.com/watch?v=xbPi8kgM8h4
@00:00 Jeff: Gives a demo of his giant R/C servos moving and talks about them.

20230202 ROS Lawn Tractor meeting
https://www.youtube.com/watch?v=JTdYo8IAF5Q
@00:00 Jeff: Gives a demo of his new fast giant R/C servos on his robot.