Fitting HSR-5990tg servos to Pheonix Hexabox issue

Hi,
I have a Pheonix hexabot that has the 12 HSR-5990TG servos.
The bottom of the servo has a nut embedded into it for mounting.
If I use this base rather than the other plain one supplied in the box.
I have to fit 4 x 1.5mm or 1/16" 3mm washers in between the servo mount and the servo bracket as the base with the nut makes the servo longer.

Just wonder what way everybody with this kit went with this issue?
Normal base or base with mounting nut?

Rod

If it’s ok with you I will answer here and not the email you sent to me. :wink:

You can install the normal servo base plate, or you can modify the ASB-04 parts as shown here…
viewtopic.php?f=11&t=4826

The later providing the strongest solution.

Your hands will be sore after you mod the ASB-04s, but it is WELL worth the effort…

You’re using 5990TGs for the Phoenix? /jealous… :wink:

Hi Guys,

Thanks for the quick response Robot Dude!
Looks like that would work ok. A bit of work doing the holes.
But I have a CNC router that could do it nicely.
I would need to jig it up tho.

I found some spacers today the exact size I need so I might go that way.
5 solid mounting points.

tom_chang79 I’m doing these for the local Science Centre.
They bought 4 of them I think.
I have 2 I’m working on.
They will have clean cable management system and a custom cnced vacuum formed top.
Running a 5000mA Li-Po

Will post pics soon.

Rod

CNC jig? Seriously? You can use a hand reamer and it takes like 2 minutes each…

Haha no! No. not really.
But it would look cool doing it.

I’ve done half of them now, only 3 to go.

Hi,

Looking forward to see some pics and vids of your Phoenix on steroides :wink:
How are you planning to power the servos? The 5000 mAh LiPo directly to VS1/2 or using regulators?

Hi zenta,

Not too far away from pics.
I’ll put the Li-Po directly into the VS1/2, but will need to fit a few 5A diodes to drop the voltage 0.7V each for a 1.4V drop for the 6V servos HS-5645mg.
The HSR-7990TG servos will run ok on 7.4V.

I have the Hexapod building Bug and next project will be a scorpion with working tail.
I’m going to take after your lead Zenta and start building some Hexapods designs.
I have a workshop at home with CNC Router, CNC Mill And CNC Lathe.
I should be able to make something quite specky looking.

Rod

Hi Rod,

If you’re using 5000mAH LiPo, don’t forget to get the BEC (Switcher) with a cutoff that can regulate it down to 6V. The 5990TGs can handle the 7.2V, but it does get hot (but with SUPER torque). It’s only my own personal preference to run it lower.

Also, watch your fingers with the 5990TGs. They are POWWWWWWWWWERFUL.

The best BEC in my opinion is the same one that Zenta uses. The Turnigy 8-15A UBEC with LiPo cut-off. If you’re using LiPo, be careful and make sure you balance the cells each time you charge it, never under-volt them (they die and next time you charge it, they puff). I’ve seen a couple of RC cars that had LiPos go up in flame due to user-error at my local track.

I’ve been meaning to get a hold of some Turnigy 8-15A UBEC, but each time I look, the distributor’s stock number gets further and further into negative (huge backorder).

Jim, if you’re reading this, you interested in carrying these? If you carried the Turnigy 8-15A BECs, I’d rather buy it from you. Shipping from IL and supporting LM is a double-plus in my book :slight_smile:

http://www.modellbau-lenz.at/onlineshop/images/turnigy_BEC.jpg

I will look into it. :smiley:

Thanks for the info. I did find that there was a bit of heat getting into the aluminium frame from the servos.
The battery is 7.4V.
But running on a 6v it was ok.

I just have to build a programmer to access and set the servo limits.

Rod