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GhengisDhon
03-17-2018, 07:42 PM
7184

We've made a few changes to the target plates for 2018. For the most part, these changes will be transparent to the end Mech user.

As in 2017, R-Team will be providing the target plates to each competitor just prior to the match start. In addition, we will also be providing the transponder as well. I repeat, for 2018 Robogames, competitors will NOT need to provide a transponder. The transponder is integrated into the back target plate. The mounting method, of the target plates to the Mech will be identical to 2017.

Info on how to mount the target plates can be found here:
http://forums.trossenrobotics.com/showthread.php?8928-2017-Mech-Target-Plates
https://github.com/ghengisdhon/rbots/blob/master/Target%20Plates%202017/2017%20Robogames%20Target%20Plates.pdf
(https://github.com/ghengisdhon/rbots/blob/master/Target%20Plates%202017/2017%20Robogames%20Target%20Plates.pdf)
The major difference (for Mech Builders) to the 2018 plates from the 2017 plates is that they now use 4-pin Dynamixel connectors. We highly recommend that competitors integrate the harness/connectors through their mech. Basically, you need a harness from each target plate location on your mech, to the back target plate location on your mech. (We will have limited loaners available.)

The 4-Pin Dynamixel connectors can be bought from Trossen here:
http://www.trossenrobotics.com/store/p/6261-Dynamixel-100mm-4-Pin-Cable-10-Pack.aspx
http://www.trossenrobotics.com/store/p/6260-Dynamixel-140mm-4-Pin-Cable-10-Pack.aspx
http://www.trossenrobotics.com/store/p/6262-Dynamixel-180mm-4-Pin-Cable-10-Pack.aspx
http://www.trossenrobotics.com/store/p/6263-Dynamixel-200mm-4-Pin-Cable-10-Pack.aspx
http://www.trossenrobotics.com/store/p/6264-Dynamixel-240mm-4-Pin-Cable-10-Pack.aspx

Hope this isn't to confusing... if you have questions, let me know and I'll try to clarify.

jwatte
11-21-2018, 09:00 PM
Is there some kind of interactivity between the scoring system and the 'mech, such as telling the 'mech where it's hit and what the score is?
Or, barring that, is the network protocol going to be finally robust and easy to use? :-D

(Not that I'm building a new mech or anything. I don't have time for that. Just checking.)

GhengisDhon
11-25-2018, 09:31 AM
Is there some kind of interactivity between the scoring system and the 'mech, such as telling the 'mech where it's hit and what the score is?
Or, barring that, is the network protocol going to be finally robust and easy to use? :-D

(Not that I'm building a new mech or anything. I don't have time for that. Just checking.)
7365

Such privileged information only goes to those who are ACTUALLY building a mech! Honestly though, there used to be a pin on the transponder board that indicated the hit & location. We've respun the boards a few times and have been trying to minimize the board foot print, so I'll have to check with Artans and see if it has survived all the revisions.

jwatte
11-25-2018, 01:13 PM
In the best of worlds, that pin wouldn't use the hundreds-of-milliseconds pulse protocol, but instead send a UART byte at 115,200 bps or something like that ... A value something like:


(0x80 if counted, 0x00 if not counted) | ((panelid & 3) << 5) | (remaining hitpoints)

And if you're out of serial capability, doing the same with a soft-serial at 9600 bps would still be alright :-)

artans
12-05-2018, 04:35 PM
In the best of worlds, that pin wouldn't use the hundreds-of-milliseconds pulse protocol, but instead send a UART byte at 115,200 bps or something like that ... A value something like:


(0x80 if counted, 0x00 if not counted) | ((panelid & 3) << 5) | (remaining hitpoints)

And if you're out of serial capability, doing the same with a soft-serial at 9600 bps would still be alright :-)

To detect hits, it's still the legacy pulse. The pulse will be 50-200 ms based on which plate was hit. Unfortunately right now the pulse only happens when it scores a hit, so it doesn't tell you when you're getting hit and it doesn't count. The transponder works off 3.3V now using a 1s LiPo. The signal with the pulse is open collector now.

If we redo it, I'll consider implementing software serial.

jwatte
12-06-2018, 08:07 PM
Thanks for the info!

Gertlex
04-25-2019, 10:57 AM
Assuming we're using this same setup next month, can we get dimensions of where the 4pin connector is located on each score panel? I want to make sure I have clearance for the cable that will plug in... (better yet, potentially, did we consider using right-angle dynamixel connectors, rather than perpendicular to the target panel?

giantflaw
04-25-2019, 01:54 PM
They are right angle connectors pointed down. A little above horizontal center. From the backside right of vertical center. I'll get some measurements and a picture to post tonight. No one has had an interference problem with them so far.

jwatte
04-25-2019, 08:33 PM
If it's like the previous ones, it's centered horizontally and about an inch down vertically. That's my current assumption until I'm proven differently!

giantflaw
04-25-2019, 11:28 PM
I was a little wrong in the previous description. This is the latest rev C plate from late 2017. Still current. Target plate is 3.5 x 3.5 inches with a Velcro strip down each vertical side. The connector is a right angle 4 pin male facing down. The center of the connector body is about 1.5" from the bottom and about 1.25" from the side. The mating female connector plugs in from bottom side of the male connector.

7501 7502 7503 7504

Gertlex
04-26-2019, 12:21 AM
Thanks for the pictures! Am I correct in understanding that the back panel will have 3 (or 4?) connectors, plus an integrated 1S battery (I don't recall where I read that).

giantflaw
04-26-2019, 09:21 AM
Yes, it's about 1 inch thick and meant to go in the back of the robot but it could go anywhere. You feed 3 small wire harnesses through the robot to connect the 3 regular plates to the one in the back. You can see the 3 open male pin connectors below. There is a built in battery, transponder, radio, impact sensor and switch. It Velcros on like the other plates. You can provide your own wire harness or we will bring plenty of extras of varying length for people to borrow along with the plates.

7505 750675077508

Gertlex
04-26-2019, 09:46 AM
Awesome, thanks for the pics!

cire
04-26-2019, 11:00 AM
I noticed there was a 2"-18" limit for the panel mounting height, what about 1" height off the ground? I may have already designed it to like 1.5" I think...

GhengisDhon
04-26-2019, 11:41 AM
We've had discussions about that rule in the past as well. It was a legacy rule and we're not sure what the rationale behind it was. The way I see it if your under 2" of the ground its potentially more of a disadvantage than an advantage. More likely to catch ricocheting BBs as well as bumping into ground clutter.

We'll waive the rule if you come under 2".

giantflaw
04-26-2019, 11:52 AM
I just re-read the 2018 rule set. The 2" was taken out as far as I can see. Section VII paragraph 5 at the Robogames 2018 site.

5. Target plates must be reasonably and FIRMLY mounted on a Mech, with their entire face located less than 22” off the ground, and not obscured by any limbs. Plates should be mounted on a flat, vertical surface, using two strips of 3.5” length velcro, so that the target plate is perpendicular to the ground.

jimfinoc
05-01-2019, 10:14 PM
... Target plate is 3.5 x 3.5 inches with a Velcro strip down each vertical side.


Sorry if this is a repeat question but I have not seen an answer elsewhere on the forums. Do we need Velcro or anything else to mount the panels to our mech? I have the space ready for the 3.5 inch size but don’t know if I need to get my own Velcro or something else to attached them to my mech.

Sincerely,
JF