Date: Wed, 6 Feb 2002 02:09:54 EST Subject: Fwd: [FRCtech2002] Digest Number 36 There are 6 messages in this issue. Topics in this digest: 1. RE: Re: Casters From: "Murray, Chris" 2. Logo Dimentions From: "sarah_kerrigan_sc" 3. Pneumatics fax orders 2/1 before noontime From: FIRST Team Support 4. Battery question... From: "cbp952" 5. Re: Battery question... From: "frcengineers" 6. RE: motor and fuses From: "frcengineers" ________________________________________________________________________ ________________________________________________________________________ Message: 1 Date: Fri, 1 Feb 2002 10:12:33 -0700 From: "Murray, Chris" Subject: RE: Re: Casters Fastenal is checking, but the part numberr is not one that their system recognizes. Perhaps this was a special order from corporate for FIRST and the caster has another numberr for regular customers. Chris Murray Team 996 -----Original Message----- From: frcengineers [mailto:frcengineers@yahoo.com] Sent: Thursday, January 31, 2002 1:43 PM To: FRCtech2002@yahoogroups.com Subject: [FRCtech2002] Re: Casters > Small Parts' catalog doesn't show the caster we received in our boxes. > Fastenal is a supplier of casters, but I haven't found that specific model. > a.) What is the specific part number for the caster? A) The specific part number for the caster is 10247-00715 b.) Is it in Fastenal's or Small Parts' catalog? A) Fastenal is the supplier of the caster, I am not sure if it is their catalog. c.) Is that specific caster handled by any chains like Loew's or Home Depot? A)Not sure, you will have to hunt around for it. --- FIRST MRT Yahoo! Groups Sponsor [] _____ To unsubscribe from this group, send an email to: FRCtech2002-unsubscribe@yahoogroups.com Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service . [This message contained attachments] ________________________________________________________________________ ________________________________________________________________________ Message: 2 Date: Fri, 01 Feb 2002 17:33:53 -0000 From: "sarah_kerrigan_sc" Subject: Logo Dimentions I've checked the manual, and have searched the website, but i have been unable to find the restrictions for the size of the logo that appears on the robot. I'm unsure on how large or how small it has to be, all i do know is that it has to be visible, which is not specific enough for our team. If anyone has the dimentions on the limits of how large or how small the team name, number and robot name on the robot has to be please respond soon. ________________________________________________________________________ ________________________________________________________________________ Message: 3 Date: Tue, 05 Feb 2002 12:59:26 -0500 From: FIRST Team Support Subject: Pneumatics fax orders 2/1 before noontime The fax machine at HPE was down on Friday 2/1 up until noontime EST. If you faxed an order to them that morning, they may not have received it, and you should doublecheck with HPE. ________________________________________________________________________ ________________________________________________________________________ Message: 4 Date: Tue, 05 Feb 2002 19:57:05 -0000 From: "cbp952" Subject: Battery question... We are provided with two batteries in the kit of parts. Realizing that only one battery may be used to power the robot during a match, is it permissible to have the 2nd battery on board the robot strictly as ballast? ________________________________________________________________________ ________________________________________________________________________ Message: 5 Date: Tue, 05 Feb 2002 22:01:18 -0000 From: "frcengineers" Subject: Re: Battery question... --- In FRCtech2002@y..., "cbp952" wrote: > We are provided with two batteries in the kit of parts. Realizing > that only one battery may be used to power the robot during a match, > is it permissible to have the 2nd battery on board the robot strictly > as ballast? A) No. See rule K9. --- FIRST MRT ________________________________________________________________________ ________________________________________________________________________ Message: 6 Date: Tue, 05 Feb 2002 22:36:49 -0000 From: "frcengineers" Subject: RE: motor and fuses Hello Q: We have big problem with a motor, speed controller and/or fuses. We decided to use tracks as our drive system. To power that we are using big 200W motors. After few tests we have discovered that one of the motors is being constantly cut off after no more than 30 seconds of working . We have investigated the problem and discovered that 30A fuse goes off each time. We have replaced all parts including speed controller , fuses and wires but nothing has changed. We have even connected for a while the speed controller to two 30A fuses but this didn't help either. Next step is connecting two speed controllers to the same motor so we could send to the motor 60A current from two fuses but we are not sure if this will help. This motor gets extremely hot very fast (on 30A current) and we are wondering if this isn't malfunction of the motor itself. We are also using the second motor to power the other track and this one works fine despite the fact that it's connected in the same way. We would be grateful for any hints.... Piotr Perczynski group 704 A: #1, DO NOT CONNECT TWO SPEED CONTROLLERS TO ONE MOTOR as this is not allowed and will likely burn up both speed controllers. #2, Track drive systems like this are notorious power hogs when turning. Look for extra friction in that side, if it's only one side you're having trouble with. Refer to section 1.2.1 of The Robot, there's a 2 page section discussing tips on working with large motors. If it turns out to be a defective motor, we can replace it for you but only if it was shipped that way. -MW ________________________________________________________________________ ________________________________________________________________________ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/