HH Servo

[Prime]

Originally Posted by JohnRobHolmes

Using the bypass adapter keeps servo power from going through the RX. If you aren't having problems then don't feel the need to switch, but it is good practice to isolate the radio from servos and external BEC in crawlers. They are the most abused and electrically noisy components, and radios don't really like having that dirty power tied through it.

Thank you for the input. I think I will go ahead and add the bypass when I add the servo. Will be ordering both by this weekend.

[JohnRobHolmes]

So my joking comment about who wants Capwn's servo was taken as a serious comment. I'm not sure how we were going to peel the servo off him and give it so others, but he was convinced. Sorry about that, I let you turn me into a regular guy for a second and crack jokes instead of being a stiff company owner like normal.


Capwn, I've sent you an email on how to return it for a refund. We need a response or servo or something from your end. Attached is our response email to you sent feb 18th.

Hello,

Please send us your servo so we may take a look at it. Instructions are on our warranty information page. Please let us know if you have any other questions.

Thanks,

Justin

[snapon boy]

I'm sorry to capwn and John. I should not have Replied to that. I had a few issues with my hh 400 Servo but I wound up with a good one in the end and am glad I sent it in.

Sent from my SAMSUNG-SM-N900A using Tapatalk

[Jus]

new HV500 only lasted 2 runs in my Wraith. Disappointing. Hitec 7950 went back in for good. Yes the Hitec has been wounded twice (broken case and after about 5 years of abuse, a couple broken teeth on the big gears)

I'm a fan of Holmes and will continue to be, but that's 0-2 for the servos. (Once with the old 400 and same with the new 500) Customer service is excellent of course and my new servo will be here friday, but it's going in a 1.9 rig only. We'll see how it does there.

Since both my servos failed the same way, with broken pins inside that seized everything up, I wonder if the rigid aluminum case has anything to do with the pin failure? Just curious and thinking out loud.

On another subject, has anyone tested how water tight the HV500 is out of the box? I never submarine my rigs, but a quick dunk or stream crossing isn't out of the question.

[Slovenian6474]

I believe mine got water into the output bearing which rusted and shot balls into the inside. After warranty repair, I've put waterproof grease all over the bearing and output shaft. I haven't driven in water again yet to try it out though

[JohnRobHolmes]

The middle is still the most common break, so far we are a little under 4% of the total servos having a failure with almost all being the middle pin. We found the temper of the pins to be over hardened on broken units as compared to operational ones. Our next batch of servos lands next week with the pins more carefully tempered.

[gbean]

I must say I've finally been putting my hv500 to use.
I can't believe how smooth and silent it is.
Great piece.

[JohnRobHolmes]

New batch of servos is arrived!

[Capwn]

So whats new with the new batch ??

Also I must apologize, I ran my HV500 in the Top Truck Challenge and it did great.. I'm not one that cant eat thier words.. I like it alot.. Had it 100% underwater more than once in the tank trap.. No issues, Only crank.. . This after I abused it the best I could in a Yeti XL..

Long story short, I may have caused my own issue with the HV500, And stupidly blamed HH..

[antikid]

i got one from Amain last week, ran it once around the yard and it was great. very fast, quiet and powerful. crawled
a bit and broke a link, so the truck was down.

today, after i put new incision links on the bomber, i was playing in the yard again, and bumped into a landscaping
timber. That was enough to strip the output (?? not sure what it is properly called) gear. Went on HH site to check
on ordering a set and they are out of stock. Sent a support request to HH. 2 teeth are completely gone and 1 is
nearly gone. My gears aren't black like the pictures on HH site if that means anything.

the bump was not high speed, at all. I have hit stuff way harder than that and it's tumbled down some steep stuff
and bounced off rocks many times.

I guess it was a lucky hit? I can't wait to get it up and running again.

[JohnRobHolmes]

New batch has middle pins with proper hardness. The majority of failures (over 95%) have been shattered middle pins, enabled by overhardening. Maybe caused by some abuse


We are below 5% failure rate, but with enough breakage to know that the middle pin has been a statistically significant failure mode. I had enough data to empircally confirm it about two weeks ago, but had made an educated guess on the fix a few months back when placing the latest order.

[JohnRobHolmes]

Originally Posted by antikid

i got one from Amain last week, ran it once around the yard and it was great. very fast, quiet and powerful. crawled
a bit and broke a link, so the truck was down.

today, after i put new incision links on the bomber, i was playing in the yard again, and bumped into a landscaping
timber. That was enough to strip the output (?? not sure what it is properly called) gear. Went on HH site to check
on ordering a set and they are out of stock. Sent a support request to HH. 2 teeth are completely gone and 1 is
nearly gone. My gears aren't black like the pictures on HH site if that means anything.

the bump was not high speed, at all. I have hit stuff way harder than that and it's tumbled down some steep stuff
and bounced off rocks many times.

I guess it was a lucky hit? I can't wait to get it up and running again.

Same problem as described in my previous post, your pin probably broke first and later the gears stripped. give us an email through warranty@ , if your servo case is in good condition we will send you a new unit and rebuild yours for the next customer. FAster turnaround this way we find.

[Capwn]

Originally Posted by JohnRobHolmes

New batch has middle pins with proper hardness. The majority of failures (over 95%) have been shattered middle pins, enabled by overhardening. Maybe caused by some abuse


We are below 5% failure rate, but with enough breakage to know that the middle pin has been a statistically significant failure mode. I had enough data to empircally confirm it about two weeks ago, but had made an educated guess on the fix a few months back when placing the latest order.

So that new set of gears I was sent ( free of charge ).. Are they the updated ones? With proper hardness? giggity

[Deckard]

If I place an order today will it have the new pins?

[84yoda]

Originally Posted by Deckard

If I place an order today will it have the new pins?

Originally Posted by JohnRobHolmes

New batch has middle pins with proper hardness. The majority of failures (over 95%) have been shattered middle pins, enabled by overhardening. Maybe caused by some abuse

[Deckard]

Originally Posted by 84yoda

I just want to make sure there's no old inventory with the faulty pins. I don't know if they have servos sitting on the shelf or if they build each one to order. I assume they would replace the faulty pins in existing inventory with the new ones but you know what happens when you assume.

I had to replace the top cover on my SA1283SG and last weekend the yellow wire broke at the board. Savox is okay, but they're noisy and they seem to loose their center. The Savox in my Yeti XL has been great but the Bomber does much more real crawling.

If I could find a servo I like, I have no problem ordering a couple to have a good back up.

[shiftauto]

I'd say order what you need before they're out of stock again. I use this servo in my basher yeti and love it. Just ordered 1 for my scx and 1 for my bomber kit. You'll like these servos.

[84yoda]

Originally Posted by Deckard

I just want to make sure there's no old inventory with the faulty pins. I don't know if they have servos sitting on the shelf or if they build each one to order. I assume they would replace the faulty pins in existing inventory with the new ones but you know what happens when you assume.

I had to replace the top cover on my SA1283SG and last weekend the yellow wire broke at the board. Savox is okay, but they're noisy and they seem to loose their center. The Savox in my Yeti XL has been great but the Bomber does much more real crawling.

If I could find a servo I like, I have no problem ordering a couple to have a good back up.

They were sold out but just got more in a few days ago, so I'm pretty sure you'll get one with updated pin. Im sure holmes can confirm that.

[JohnRobHolmes]

Originally Posted by Capwn

So that new set of gears I was sent ( free of charge ).. Are they the updated ones? With proper hardness? giggity

Your pins could be over hardened. We will have additional inventory of that part soon, and could harvest from new servos until then if needed.

Originally Posted by Deckard

I just want to make sure there's no old inventory with the faulty pins. I don't know if they have servos sitting on the shelf or if they build each one to order. I assume they would replace the faulty pins in existing inventory with the new ones but you know what happens when you assume.

You assume correct. We have a few servos on the shelf from the old batch that I will either destroy for testing or rebuild for sale.

[Shinjari]

I'm sorry if I'm late to the show or over looked, but I have one of the earlier HH servos BLS400 (gray/gunmetal case) and its been mocked up on my super slow ultra4 build since I purchased it back in 2014 (wow time flies).

Does the over hardened pin apply to this batch of servos as well?