SparkFun Electronics Commentsurn:uuid:214d0e4e-f1b1-d287-ce26-ac5b4c9f82492024-03-29T05:05:33-06:00SparkFun ElectronicsPaxs on ROB-12091 - Multi-Chassis - Tank VersionPaxsurn:uuid:ab700766-a2f6-3dd1-e6c3-c6a1a7abec852016-05-02T13:44:48-06:00<p>Hello, Could anyone please tell me the weight of this kit?</p>
hurst robotic kid at robotic camp on ROB-12091 - Multi-Chassis - Tank Versionhurst robotic kid at robotic campurn:uuid:f0abc7a1-d43a-8d02-9fe4-2f972efb95ee2015-07-13T11:32:42-06:00<p>Ok guys I'm going to cry, the battery pack is mounted in the bolt slots that slide diagonally. Also, you can mount the "red board" (highly recommended) with two bolts on it, we used this kit in robotics camp two days ago. And they uped the motor speed via programmer. The red board is basically arduino uno, it still uses that programming language of arduino, please say if this was helpful.</p>
Aaron on ROB-12091 - Multi-Chassis - Tank VersionAaronurn:uuid:844359e4-c153-50da-2fcd-260605dd5ec72015-04-23T14:59:36-06:00<p>I love this chassis. It's an awesome mix of quality and price. The motors are much quieter than the other toy chassis I bought years ago.<p>The one problem I had was mounting the wheels on the motors. The fit was soooo tight (yes, I lubed it as instructed) that I think I ended up bending the shaft the wheels are mounted on. As a result, my robot has a bit of a hitch in his giddyup.. They were such a pain to put them on I don't know if I'll be able to ever get them off to replace them without destroying the whole thing.</p><p>Other than that it's a good kit for the money.</p></p>
Customer #282738 on ROB-12091 - Multi-Chassis - Tank VersionCustomer #282738urn:uuid:0755684c-b7b0-2038-fef5-0be2f4659a0c2014-11-21T21:21:23-07:00<p>I'm a little disappointed with this kit. It looks so good, but its looks are deceiving. As others said, its not perfect. My biggest problem is just the lack of power. Using a motor shield and the same battery pack I use with the Tamiya tank kit this stalls out with the slightest obstacle and just doesn't move very quickly.</p>
onebeartoe on ROB-12091 - Multi-Chassis - Tank Versiononebeartoeurn:uuid:35a21ab2-4b6b-1692-234c-d93bfc89ddcc2014-09-11T15:18:43-06:00<p>Thanks, Robert. I ended up using a Raspberry Pi, a Ryanteck motor controller board, and Java for the software.<p>http://electronics.onebeartoe.org/roller/assembly/</p><p>http://electronics.onebeartoe.org/roller/usage/</p></p>
FlowerAskew on ROB-12091 - Multi-Chassis - Tank VersionFlowerAskewurn:uuid:fdcbde0e-a3bd-ead3-43c9-4796eccbfa152014-02-18T20:41:38-07:00<p>I agree with this except for stalling while driving over a pencil. I have no idea how this happened, mine works really well. After I perform further testing I will post some measurements.</p>
FlowerAskew on ROB-12091 - Multi-Chassis - Tank VersionFlowerAskewurn:uuid:41f2c7ca-594b-41fe-f6cd-669c0341df392014-02-18T20:39:19-07:00<p>This chassis is really good. I'm using it with the serial controlled motor driver and it works great. Also, I have no idea how this managed to stall driving over a pencil. Mine seems very powerful running at 9 volts.</p>
RobertC. on ROB-12091 - Multi-Chassis - Tank VersionRobertC.urn:uuid:b8cc06dd-53be-8bdd-8cf0-4a68d32382e22014-02-07T15:21:11-07:00<p>check below in the related products. it's the 'wheel encoder kit'.</p>
mhectorgato on ROB-12091 - Multi-Chassis - Tank Versionmhectorgatourn:uuid:2d383aab-9c56-4955-8066-89a7f057fe8d2014-02-07T13:54:22-07:00<p>Any plans to include encoders? If not, do you have any suggestions what encoders will work with these motors? Thanks!</p>
FlowerAskew on ROB-12091 - Multi-Chassis - Tank VersionFlowerAskewurn:uuid:5391a224-0b14-4b4b-067d-21ec322091c62014-02-01T10:53:18-07:00<p>It's on the box when you get the chassis.</p>
Briscoe on ROB-12091 - Multi-Chassis - Tank VersionBriscoeurn:uuid:f89122c2-bab6-f6c4-96e1-c054fc7bf9ca2014-01-28T11:52:01-07:00<p>Thanks for the reply! Where did you find that information?</p>
FlowerAskew on ROB-12091 - Multi-Chassis - Tank VersionFlowerAskewurn:uuid:c1118503-586b-0dc7-1953-55bfb19a7bad2014-01-28T10:47:38-07:00<p>Stall current is supposed to be 2A.
Nominal current is supposed to be 800mA.</p>
nsa on ROB-12091 - Multi-Chassis - Tank Versionnsaurn:uuid:b45235b7-89ff-ab4e-4d62-5f8c7812a7432014-01-15T05:01:25-07:00<p>when is going to be really available? i've been waiting for more than a month..</p>
FlowerAskew on ROB-12091 - Multi-Chassis - Tank VersionFlowerAskewurn:uuid:2ccdbd4c-76e1-12f7-7566-7f6b35a0c8ad2014-01-05T15:50:40-07:00<p>The tutorial is archived. It is <a href="https://www.sparkfun.com/tutorials/348" rel="nofollow">here</a>. You can also find cheap radio controllers <a href="http://www.hobbyking.com/hobbyking/store/__295__190__Radios_Receivers-2_4Ghz_HobbyKing.html" rel="nofollow">here</a>.</p>
FlowerAskew on ROB-12091 - Multi-Chassis - Tank VersionFlowerAskewurn:uuid:a1b0a7c7-593b-5235-32f0-d838179a107b2014-01-05T15:46:21-07:00<p>I know sparkfun has one, I've been to It before. If I find it, I'll let you know.</p>
UQOnyx on ROB-12091 - Multi-Chassis - Tank VersionUQOnyxurn:uuid:f9a703b6-f628-0203-977b-f98250c127512014-01-05T15:32:08-07:00<p>I am completely new to Arduino.
I want to use this for an r/c project. Can someone direct me to a tutorial for using this with an r/c radio system?</p>
Briscoe on ROB-12091 - Multi-Chassis - Tank VersionBriscoeurn:uuid:50555a28-4e20-a4b2-a48e-1f43d70ff0542013-12-02T23:25:13-07:00<p>"stall trying to drive over a pencil" - you must be doing something wrong, this thing should have no problems going over a pencil. You axles sound way too tight, or you are not controlling the motors the right way and supplying them with proper power. What kind of motor controller are you using?</p>
picklecolor2 on ROB-12091 - Multi-Chassis - Tank Versionpicklecolor2urn:uuid:82bb1fd8-d0a6-5668-0ace-33a6fe202f2e2013-12-02T23:13:06-07:00<p>I am very impressed with most of the chassis. Dagu has done a nice job. The aluminum is nicely punched and folded. There are abundant slots and holes for mounting just about anything. I was surprised and impressed with the bearings that the wheels run in. They make a big difference in how smoothly everything goes together. Assembly is mostly easy and straightforward. Tread quality is good. Everything seems like it would stand up really well to falls, even from 4' high workbenches.<p>I just have a few gripes:
No mounting holes in a pattern for Arduino? I can mount 42 servo motors, but no controller? C'mon!
No mounting holes for the <strong>included</strong> battery pack? This is inexcusable!
The bent up prongs in the chassis interior make it really hard to fit the pack next to the motors even if you drill new holes to mount it.
Getting the wheels mounted on the output shaft was a trick. I had to stack the included washers and use screws to pull the wheel onto the shaft. Trimming a little of the plastic where the motor output shaft enters helped.
Lack of power is disheartening. I'm going to look into higher power motors, but these stall trying to drive over a pencil. I don't know what trickery was involved with the stair climbing in the Product Video.
Has paint that chips, anodizing would be nice.</p></p>
picklecolor2 on ROB-12091 - Multi-Chassis - Tank Versionpicklecolor2urn:uuid:ab77c33f-33a5-8a16-efd9-301fae2c6f6f2013-12-02T22:59:59-07:00<p>I'd estimate that 60rpm is fairly accurate for the load of just the tread. Using the Ardumoto and 5 fresh alkaline batteries I got about that speed at 100% PWM. The problem is the stall. This poor thing stalls at about 10-15 degrees of incline at 100% PWM. I'm a little disappointed that this great chassis is limited to flat floor crawling.</p>
RobertC. on ROB-12091 - Multi-Chassis - Tank VersionRobertC.urn:uuid:83998111-b784-7241-23e8-d742818c71d22013-11-05T09:42:12-07:00<p>I hid them to save future confusion. Thanks for catching the pictures, we'll get them updated.</p>
jkm on ROB-12091 - Multi-Chassis - Tank Versionjkmurn:uuid:a0ce1dc0-d3ae-076d-c518-69117640f3a72013-11-05T08:20:05-07:00<p>The main picture still shows the encoder wires/connectors.<p>Did you delete the other posts?</p></p>
RobertC. on ROB-12091 - Multi-Chassis - Tank VersionRobertC.urn:uuid:a44b3b46-e605-8f44-7399-7e7d3229bc622013-11-04T09:48:53-07:00<p>Sure.</p>
RobertC. on ROB-12091 - Multi-Chassis - Tank VersionRobertC.urn:uuid:2ccbd481-6526-8b78-f6bf-f827a46ec7d72013-11-04T09:45:48-07:00<p>Sorry, but the encoder is NOT included. We made a mistake!</p>
jkm on ROB-12091 - Multi-Chassis - Tank Versionjkmurn:uuid:1857840a-70cd-75af-3d42-9ba4db984b6c2013-11-02T13:22:34-06:00<p>When I read the description I assumed it was only the magnets/hubs because the parts picture doesn't show the hall-effect sensors. Looking more closely at the fully assembled picture I can see the 3-wire connectors from the encoders.</p>
Briscoe on ROB-12091 - Multi-Chassis - Tank VersionBriscoeurn:uuid:e94850aa-5a7b-4dd3-81d7-6913cde15df62013-11-02T01:52:15-06:00<p>Thats a good question, we dont know its stall current rating. Datasheet says max no load current is 170mA.<p>Can you guys stall a motor out at 7.5v (same as five AA batteries) for us and see what its max current is? B-)</p></p>
rkvt on ROB-12091 - Multi-Chassis - Tank Versionrkvturn:uuid:d71ac316-1eab-1fb7-9263-675b26348f7a2013-11-01T21:35:23-06:00<p>Would someone check this math?:
Motor Speed = 65rpm No Load. So lets estimate 60rpm with some light load.
Wheel diameter = 52mm. Lets say 54 with the tread added. (so radius = 27mm)<p>So using the formula for tangential velocity given the period (1s), and radius, I find the speed of the chassis would be about 0.170m/s or 0.380mi/h.</p></p>
Customer #290093 on ROB-12091 - Multi-Chassis - Tank VersionCustomer #290093urn:uuid:d1945250-ffd4-3694-224d-43eaeed7a7132013-11-01T16:43:54-06:00<p>Could it be used with the RaspiRobot Board "https://www.sparkfun.com/products/11561" ?</p>
RobertC. on ROB-12091 - Multi-Chassis - Tank VersionRobertC.urn:uuid:552b403f-4a28-bed0-6921-77365d9b9e842013-11-01T11:36:35-06:00<p>It's pretty basic "turn motor on" to drive. you just need a motor driver that can power 2 motors. the redbot mainboard would work.</p>
tcmichals on ROB-12091 - Multi-Chassis - Tank Versiontcmichalsurn:uuid:b5be7757-60f0-a9eb-06a7-b787c612c6af2013-11-01T10:58:22-06:00<p>Will the the <a href="https://www.sparkfun.com/products/9457" rel="nofollow">Motor Driver 1A Dual TB6612FNG</a> work for this platform?</p>
onebeartoe on ROB-12091 - Multi-Chassis - Tank Versiononebeartoeurn:uuid:c44c3371-9fc5-cdb1-eaab-b0439758bb4a2013-11-01T10:06:24-06:00<p>Is there documentation or example code on how to control this with a Raspberry Pi (preferably) or Arduino?</p>
jkm on ROB-12091 - Multi-Chassis - Tank Versionjkmurn:uuid:e6bdd0ca-7ade-44a8-9cc3-49f4f1b81e692013-10-31T23:40:05-06:00<p>In the documents section you provide a datasheet for the RS030 encoder. There is no mention of them being included in the kit nor do they appear to be available from Sparkfun. Are they included?</p>