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Glenn Beer
Active User
KST’s Spec. Sheet for X06.
Glenn Beer
Active User
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Konrad
Very Strong User
Sorry still don't see any specifications (performance rating) @ 8.4V.
HSO8 spec.
P.S.
I find it odd that with wide voltage amps that the signal logic is still TTL. I'd have thought it was CMOS (1/3 Vss).
HSO8 spec.
P.S.
I find it odd that with wide voltage amps that the signal logic is still TTL. I'd have thought it was CMOS (1/3 Vss).
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Glenn Beer
Active User
I see ratings at 7.4v. I’ve seen that same rating voltage on many WV servos. Don’t know what’s up with that.
Glenn Beer
Active User
That signal at 5v (4.8v?) is likely kept so servos remain compatible with the legacy equipment.
Glenn Beer
Active User
Some of the old stuff didn’t use TTL.
just a timer driven by the pot compared to the input pulse width which drove the motor whichever way needed to make the difference vanish.
just a timer driven by the pot compared to the input pulse width which drove the motor whichever way needed to make the difference vanish.
purview
Very Strong User
Wayne should have this spec sheet, there is a link to the download pdf
kst-servo-shop.de
HS08-A 0,5 N/m @ 6V für Modelle bis 2,5 kg
Empfohlen für Thermiknodelle bis 2,5kg Abfluggewicht (Querruder, Seiten- und Höhenruder) KST HS08-A Technische Daten: Betriebsspannung [V]:…
kst-servo-shop.de
Konrad
Very Strong User
Yep. Are your posted spec's different than the spec's I posted?
Speed and power have been improved over all voltage ranges other than 3.8V. At 3.8V there is a speed hit. But let's be honest here, we (I'm) not likely to use the HSO8 in a single cell application. I still think the XO-8 is better for the single cell.
With KST's reputation I have no issue with using these at 8.4 Volts. This voltage is approved by KST.
Like you and other, I wonder why we don't see any performance spec's at 8.4V.
Speed and power have been improved over all voltage ranges other than 3.8V. At 3.8V there is a speed hit. But let's be honest here, we (I'm) not likely to use the HSO8 in a single cell application. I still think the XO-8 is better for the single cell.
With KST's reputation I have no issue with using these at 8.4 Volts. This voltage is approved by KST.
Like you and other, I wonder why we don't see any performance spec's at 8.4V.
gp49
Very Strong User
I asked the question on the KST website yesterday. Now I'm holding my breath, waiting for the answer ?
Hmm, I wish KST would share these nice documents with me. I'll have to bug them a bit.
Even though we are one of the few shops that buys direct, we hardly ever find out about new items from them or are given specs, etc. That is what happens when you deal with the president of the company. That and KST is a funny company, they prefer not to mess about with sales and marketing, so they outsource all of that. I have managed to get our foot in the door where we deal direct as we had issues with the third parties. KST rather focus on the product production and development.
Even though we are one of the few shops that buys direct, we hardly ever find out about new items from them or are given specs, etc. That is what happens when you deal with the president of the company. That and KST is a funny company, they prefer not to mess about with sales and marketing, so they outsource all of that. I have managed to get our foot in the door where we deal direct as we had issues with the third parties. KST rather focus on the product production and development.
Konrad
Very Strong User
LOL
Management!
I more than understand not wanting to deal with the marketing side of things! But as an engineer, documentation is the sole responsibility of engineering.
Glenn Beer
Active User
Specs are available on their web.
Glenn Beer
Active User
Not sure I see the value of 8.4v ratings. The lipo isn’t going to stay that high for very long. Especially if there is a launch motor drawing it down.
Konrad
Very Strong User
I have some 2 cell 2m gliders that have large batteries (5000mAh). As these are digital servos there is a lot of pulsed energy being used just holding the control surfaces at neutral, particularly at speed.
So my set up can keep the Vss at 8.4v (fully charged 2 cell lipo) for a lot longer than one might think.
Ok, at 120 amp draw there is some voltage suppression. But this only lasts for about 9 seconds. Then the battery voltage bounces back when the motor is shut down.
But the question still remains why didn't KST issue spec's for 8.4v as the servo is rated to operate at 8.4V.
So my set up can keep the Vss at 8.4v (fully charged 2 cell lipo) for a lot longer than one might think.
Ok, at 120 amp draw there is some voltage suppression. But this only lasts for about 9 seconds. Then the battery voltage bounces back when the motor is shut down.
But the question still remains why didn't KST issue spec's for 8.4v as the servo is rated to operate at 8.4V.
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