2002 Kit Hitec Servo Part Number

[kmcclary]

Can someone please tell me Hitec's part number for the 2002 kit's servo? I'm with a new team now, and don't have access to the old kit to stare at one.

The specs look a lot like either the HS-85MG, the HS-85BB, or one of the HS-125 series, but if someone can peek at their robot or in their kit and tell me what it was for real, I'd appreciate it.

BTW, if some team or person has compiled a complete chart of ALL of the manufacturer's REAL part numbers for last year's kit (and/or a set of URLs for spec sheets, app notes, etc...), I'd be interested a URL for that list, spreadsheet, or DOC file too!

Thanks!

- Keith

[sanddrag]

I believe the servo was an HS-303. I know the store price on the one in the kit was less than $15 because I was going to buy some. It is a "standard" servo whatever the part number is. I believe the 303 has been discontinued and replaced with the 311. The one in the kit was not metal gear (MG in part number). I'm not sure if it was ball bearing (BB) though.

These links may help:
http://www.hobbypeople.net/prdcls/servoa03.asp
http://www.hitecrcd.com/product_fs.htm

This link may be of some assistance to you regarding your other question.
http://www.usfirst.org/robotics/doc_art1.htm

[kmcclary]

Originally posted by sanddrag
I believe the servo was an HS-303. [...] I believe the 303 has been discontinued and replaced with the 311. The one in the kit was not metal gear (MG in part number). I'm not sure if it was ball bearing (BB) though.

These links may help: [...]

Thanks sanddrag, but I don't wish to guess. I need to have someone verify the exact part number, as I have an unusual idea and wish to examine that servo before the contest cycle starts to know if it's even feasible. Can someone please verify the exact part number used?

BTW, WRT to the parts, yea the HS-303 was discontinued. It's also interesting that the HS-311 does NOT appear on Hitec's "all servo" list at:
- http://www.hitecrcd.com/Servos/allservos.htm
Hmmm... Maybe that list just not up to date yet. The HS-311 does have the right specs, too...

WRT the FIRST list, I was in the contest with another team last year and already have all of those docs. The problem is that the FIRST "List of Components" in the 90 page 25.5MB KIT_P_HLIST.PDF" doc on the link you show does NOT show the manufacturer's true part number for each supplied part. Many of the data sheets further down are "family" sheets too, covering many variants of the parts. Unless you have a part in hand (which I don't anymore), it is often difficult to tell which of the family you have for any particular part.

That's why I'm still hoping someone actually took the time to make an exact parts list for the 2002 kit, with the true manufacturer's part numbers for the specific instance of each part. I did that for a few of the parts, but man oh man, at times it was a real pain to track down some of them. Unfortunately, I don't even have that partial list anymore.

Did anyone out there bother to make a REAL parts list for the kit, with the EXACT part numbers for each part?

- Keith

[dlavery]

Keith-

If your idea is so dependent on knowing the exact part number and configuration of the servo, then may I make the following suggestion: stop and wait until January 4. Even if you know the exact part number of the servo used in the 2002 kit of parts, there is absolutely NO guarantee that the same part will be used in the 2003 kit. If your idea requires such a high degree of specificity to determine if it is feasible or not, then there is a distinct probability you will end wasting a lot of time and effort if (or when) you find out that the servo used in the 2003 kit doesn't match your design.

To determine the probability of this happening, just take a look at the contents of the kit of parts over last several years. See how often the particular items, particularly the small motors and control system components, change from year to year.

If you can't wait until January, then you might want to see if you can make your design concept a little more flexible in terms of the ability to incorporate alternate servo (or other small motor) configurations. Expect and anticipate changes. Then you will be better prepared should they happen, and you will have a more robust design even if they don't.

-dave

[kmcclary]

Originally posted by dlavery
Keith-

If your idea is so dependent on knowing the exact part number and configuration of the servo, then may I make the following suggestion: stop and wait until January 4. Even if you know the exact part number of the servo used in the 2002 kit of parts, there is absolutely NO guarantee that the same part will be used in the 2003 kit.

I'm willing to take the chance. I'm deliberately being vague so as not to "spoil the surprise" of what I wish to attempt. If I asked what I REALLY want to know, it would give it away.

I need this test done before Kickoff because I have way too many other things to do after it. I also want to see what breaks first when things get hairy, and I'd rather trash my own part with "limit testing" than a kit supplied part. This is my new team's first year, so we won't have spares for this kind of test.

I simply desire my test jig to be as accurate a simulation as possible. Knowing last year's part number (or its closest relative) helps tremendously when I buy it by giving me a really good idea of what FIRST Purchasing considers "the regular servo". Heck... If I'm going to spend my money wrecking something with this test, I wanna buy the right part the first time!

- Keith

[Matt Reiland]

In my (Rc Car/Helicopter) experience the servo's are very similar, they all have very similar sizes (standard) and similar torques for the standard application servos from HiTec, Tower and Futaba. Only the specialty servos differ in micro size, digital or high speed/torque. Using a standard part # servo should do for just about anything you can do with a servo that I can think of. I do not think you can modify the servo for continous rotation like the EduRobot servos according to the rules but I could be wrong. If you can, there are a bunch of instructions on the net.

Good Luck!

[kmcclary]

Thanks for all the myriad advice about servos, but I'm not going to say (or hint at) what I'm doing!!! <chuckle>

Aw come on guys, gimme a break. It's a very... simple... question...

Can someone PLEASE look at a servo from last year's kit and just tell me the actual Hitec part number that's written on it???

Thanks!

- Keith