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View Full Version : RX-28 or RX-64 to support panning of SICK S300?



wmccafferty
09-07-2010, 05:37 PM
Hi all,

I've got a SICK S300 (http://www.sick.com/group/EN/home/products/product_news/optoelectronic_protective_devices/Pages/s300.aspx) on its way and I'm looking to get a servo for panning it for point-cloud data; accordingly, I need to purchase a servo to provide the panning mechanism. I'm planning on mounting the 2.1 kg (2.6 lb) laser scan to a servo frame and I'm looking for guidance on which servo to purchase to support the weight of the laser scanner. The SICK S300 would be back mounted (http://biz41.inmotionhosting.com/~moxley5/main/images/stories/sick/S300Bracket-All.jpg) to the servo frame.

So I'm trying to figure out if an RX-28 (http://www.trossenrobotics.com/dynamixel-rx-28-robot-actuator.aspx) with a hinge frame set (http://www.trossenrobotics.com/p/Robotis-Dynamixel-FR07-H101K-Hinge-Frame-Set.aspx) would suffice or if I really need to upgrade to an RX-64 (http://www.trossenrobotics.com/dynamixel-rx-64-robot-actuator.aspx) with an angled frame set (http://www.trossenrobotics.com/store/p/6277-Custom-Frame-OF-64H45-Set.aspx). Or should I go with something completely different?

I wasn't sure how to translate weight into kgf/cm...so I figured I'd ask for help.

Thoughts?

Thank you,
Billy McCafferty
http://www.sharprobotica.com/

DresnerRobotics
09-07-2010, 05:56 PM
The RX-28 should be sufficient. That said- is it possible to mount the SICK unit on top of a servo so that the servo doesn't have to swing the center of gravity at the end of a lever?

wmccafferty
09-07-2010, 06:32 PM
That was my biggest concern as well; I bet I can figure something out to mount it to the top of a frame instead of in front of it using this frame set (http://www.trossenrobotics.com/p/Robotis-Dynamixel-FR07-H101K-Hinge-Frame-Set.aspx) and some 90 degree bracket to mount between the servo frame and the back mount of the laser scanner.

Thanks for the advise!
Billy McCafferty
http://www.sharprobotica.com

lnxfergy
09-07-2010, 07:34 PM
One reason I might see to upgrade to an RX-64 is that it would be under very little load -- which would make it quieter than a loaded RX-28. Just a thought to keep in mind -- especially if you want to run the tilt quite frequently (that servo noise can get annoying fast).

-Fergs

wmccafferty
09-08-2010, 02:50 PM
That's a great tip...it'll be running almost continuously.

Billy

SK.
09-08-2010, 04:47 PM
I´d also definitely go for a RX-64 based solution. The S300 is quite heavy compared to the Hokuyos that are more frequently used in combination with Dynamixels, so some extra power won´t hurt (and it also won´t hurt significantly financially when looking at the total cost for the system).

DresnerRobotics
09-08-2010, 04:52 PM
I´d also definitely go for a RX-64 based solution. The S300 is quite heavy compared to the Hokuyos that are more frequently used in combination with Dynamixels, so some extra power won´t hurt (and it also won´t hurt significantly financially when looking at the total cost for the system).

Go Darmstadt Dribblers! Woo!