New ASB-24s (Edit: Changed 04 to 24)

If I order the ASB-04s now, will I get these:

I really would like to get those, the extra holes for the servo hinges will come in handy…

isn’t the photo you are linking for the new ASB-24 and not the ASB-04 :question:

Ahhh ASB-24s! I was wondering if Jim was going to obsolete the ASB-04s or something, but that wouldn’t makes sense since most of the servos out there does not have a hinged back…

I hope Jim puts the ASB-24s up on the .com soon! I would like to order some of these to try out with some hinged servos!

If I am not mistaken, in the same thread that picture came from he also said that while some stock had arrived they would not be available until after they have completed their move.

Yeah, I assumed that the move would be complete over this past weekend, but it looks like from the announcement from the .com that it’s next week…

I can see where the additional “hub” hole patterns on the ASB-24 would be handy, but why would one want to add a servo hinge part in situations where an ASB-04 can be used?

The ASB-04 takes a screw at the right position for the bearing, and that’s all that’s needed. Is there something else?

Alan KM6VV

Well it was a recommended way to attach the servo hinge to the unit, servo+asb-24 (asb-04 with an enlarged hole), for servos with the hinged backing since it provides a much stronger connection.

The swivel mechanism that attaches to the regular ASB-04s does provide some strength, but I believe that attaching the swivel to the hinge of the servo case gives it a stronger connection between the two.

Without the servo hinge casing, the C-brackets connects to the servo through the ASB-04, so essentially, it connects to the servo but indirectly, with the hinge casing on the servo, the hinge can be directly connected to the servo, provided a better connection in my view…

That could be it. However at least in my case (I didn’t use the sticky tape yet) the servo hinges aren’t all that tight on the servo.

I’m reluctant to attach the hinges permanently to the servos. I’m still moving them around.

I wouldn’t mind hearing more about that whole servo-hinge setup and the trade-offs.

Alan KM6VV

Oh, I’m not talking about the PSH-01s, the servos hinges are molded into the servo casing…

Many robot servos like the 5990s and the 5980s have a swappable bottom casing of the servo (opposite side to where the servo shaft sticks out) that’s hinged or not hinged…

Check out the .pdf of the mechanical drawing:

hitecrcd.com/product_file/fi … 5990TG.pdf

That explains it!

Thanks.

Alan KM6VV

This question is for Jim:

This new ASB-24s allows the use of the hinged casing of the 5990s? Or is it merely a modification for mounting to create a tibia-rotate?

Edit:

I found this pic finally, I knew I’ve seen it somewhere:

No.

The HSR5990TG’s back mount is 9.89mm in diameter. The standard bearing is 8mm in diameter. Which means you are still going to have to bore out the newer brackets.

Thanks Sienna! I can always count on you for these details.

I should’ve looked at the mechanical drawing from Hitec and compared it to the bearing :blush:

Any tips on how to bore it out? I’m planning to use just a reamer…

BTW: I received my first batch (8) of the HSR5990TG… I’ve never used digital servos before, always had analog, man, the sound (the high pitch) sure is different from the analog! Kinda similar to the sound that my speed controller makes… It’s the sound of switching (KHz range) going on right?

digital servos generally operate their motor at a higher PWM frequency than analog servos do. they also tend to sample and correct for position error at a higher rate as well. this is why two servos may have the same motor and gear train but the digital version out performs the analog version.

[size=75]oh just to nip this in the bud (not necessarily for you tom or the regulars here but for others who may understand less), do not confuse my use of the term PWM in controlling the servo motor with the PWM signals used to control the servo position (by the SSC-32 for example). Both signals are Pulse Width Modulated (PWM) but one has nothing to do with the other and they operate at radically different frequencies and duty cycles.[/size]

Thanks for the great info EddieB :slight_smile:

I can’t wait for LM to finish moving so I can buy more brackets and other robot paraphenilia!

More servos = more hunger for brackets!