RE: Digital servos - was: RE: [RCSE] HiTech Servo's
Thanks I think I get it now, digital are basically more accurate in how they work
compared to analog (just like most anything else).
-Original Message-
From: Jason Werner [mailto:[EMAIL PROTECTED]]
Sent: Sat 4/13/2002 8:48 PM
To: [EMAIL PROTECTED]
Cc:
Subject: Re: Digital servos - was: RE: [RCSE] HiTech Servo's
Mark,
There are actualyl more things working than just power output. If this
was just a motor that is on or off, then the torque is related to the power
consumption. But the digital servo has a lot of different advantages.
- There is less "slipping" under load. An analog servo has the "two
steps forward, one back" when under load. The time lag during the "off"
period is large enough to allow the gear train to move back slightly. A
digital servo does not (to the same extent at least).
- The motor is controlled in a more efficient manner. Just like a high
rate speed control, the motor is controlled better, resulting in less loss
during the motor use.
Overall digitals use more power, but not on the same direct perrcentage as
the increased torque would indicate.
Jason Werner
- Original Message -
From: "Mark Holm" <[EMAIL PROTECTED]>
To: "Rick Eckel" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Saturday, April 13, 2002 11:26 PM
Subject: Re: Digital servos - was: RE: [RCSE] HiTech Servo's
> Rick,
>
> Thanks for your observation. It is certainly true that you don't get
increased
> holding torque or faster response without more power use, but, in a servo
> system, you don't use power you don't need. Not at least if the system is
well
> designed. The servo amplifier, either digital or analog, discrete logic
or
> micro controller, only responds to off-target servo position. For most
gentle
> flying, the loads on the servos probably don't even approach the maximum
that
> "old fashioned" servos put out. If it did, a lot of us would have had a
lot
> more trouble long ago. You probably only see the extra power draw when
cranking
> tight turns at high speed, yanking big flaps down quickly at high speed or
> similar high load maneuvers. No much of a typical glider's fling time is
in
> those regimes, well ok, maybe those crazy combat guys and pylon racers.
Anyhow,
> a real world observation is worth several books full of theory. Thanks.
>
> Mark Holm
> [EMAIL PROTECTED]
>
>
> RCSE-List facilities provided by Model Airplane News. Send "subscribe"
and "unsubscribe" requests to [EMAIL PROTECTED]
RCSE-List facilities provided by Model Airplane News. Send "subscribe" and
"unsubscribe" requests to [EMAIL PROTECTED]
BHBâ²×Úr)b¶'¬¦º/×o#(ué@ºejw{ zwl¹» ®&Þjwn˱Êâmêު笶Ëh²«x+z«²Ö¢¨ r
Re: Digital servos - was: RE: [RCSE] HiTech Servo's
Tripp, Being a Microsoftie, the analogy might be, Analog servos are like MS-DOS. Digital servos are like XP. Both work but you have to choose the one that meets your needs the best. Me being a Mac guy I didn't want to go for the obvious analogy. ;) Cheers, Mark --- Tripp Meister <[EMAIL PROTECTED]> wrote: > Something I've been wondering for a while > now...What's the difference between analog and > digital servo's and why would I want to spend the > money on digital? > > -Original Message- > From: Bob Johnson [mailto:[EMAIL PROTECTED]] > Sent: Sat 4/13/2002 7:06 AM > To: [EMAIL PROTECTED] > Cc: > Subject: [RCSE] HiTech Servo's > > > > The two best thing I saw at the Toledo Show were > the smiling face of Jim > Deck at the LSF booth and the new HiTech digital > wing servo. The new HiTech > HS5125MG digital servo's were available in limited > supply. I purchased two > of them from Maxx Products. I also saw a > non-digital version of the same > servo in the HiTech booth and was told that these > should be available by the > end of the month with an approximate street price > of $50.00. The non-digital > version is the HS125MG. > > Regards, > Bob Johnson > Fond du Lac, WI > > RCSE-List facilities provided by Model Airplane > News. Send "subscribe" and "unsubscribe" requests > to [EMAIL PROTECTED] > > > D$.+-}§"+bzÊk¢øyÖò2^«¦V§x×°±'§v˱Êâmæ§véì¹» ®&Þê®zËl¶(j¸§·ª¹ë-j*Úç( __ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax http://taxes.yahoo.com/ RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
RE: Digital servos - was: RE: [RCSE] HiTech Servo's
Tripp... Here's the "short" version: Digital Servos typically have better centering, much better "repeatability" (ability to return to a specific point), a much narrower deadband, greater holding power, greater initial start-up torque, and higher frame rates than their analog cousins. Additionally, there are now programmers available for digital servos that allow you to fine-tune many of the servo parameters such as transit speed, end=points, and in some cases a "failsafe" position. As an example, the HS5125MG specs are stated as (all values at 4.8V): 0.17sec 60 deg. transit [IMO - not exceptional speed but not bad either] 41.66in/oz torque [IMO - relatively powerful] In speaking with Mike, one of Hitec's tech's, he stated that the "holding power" (a spec not usually considered when comparing servos) is 100in/oz...That's very respectable by anyone's standards! I'm not saying that the HS5125MG is THE wing servo (you know that I sell them so may appear "biased" )...It's too new to tell yet. However, based on my personal experience using Hitec Digitals in the "torture chamber" of my R/C Heli's, it should perform as well as its other digital brothers and, if it does, it will prove to be a good servo. Time will tell... The downside...Is they are typically higher in cost and they usually draw a little more power. Hope that answers your question... Sheldon YNT uDesign You Need This! Home of the BC6 Flight Monitor A Supporter of the 2002 Soaring Nationals email: [EMAIL PROTECTED] web: www.yntdesign.com -Original Message- From: Tripp Meister [mailto:[EMAIL PROTECTED]] Sent: Saturday, April 13, 2002 2:09 PM To: Bob Johnson; [EMAIL PROTECTED] Subject: Digital servos - was: RE: [RCSE] HiTech Servo's Something I've been wondering for a while now...What's the difference between analog and digital servo's and why would I want to spend the money on digital? -Original Message- From: Bob Johnson [mailto:[EMAIL PROTECTED]] Sent: Sat 4/13/2002 7:06 AM To: [EMAIL PROTECTED] Cc: Subject: [RCSE] HiTech Servo's The two best thing I saw at the Toledo Show were the smiling face of Jim Deck at the LSF booth and the new HiTech digital wing servo. The new HiTech HS5125MG digital servo's were available in limited supply. I purchased two of them from Maxx Products. I also saw a non-digital version of the same servo in the HiTech booth and was told that these should be available by the end of the month with an approximate street price of $50.00. The non-digital version is the HS125MG. Regards, Bob Johnson Fond du Lac, WI RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] D$.+}+zʢy 2Vxױ'v˱m v鹻&z jj* RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
Digital servos - was: RE: [RCSE] HiTech Servo's
Something I've been wondering for a while now...What's the difference between analog
and digital servo's and why would I want to spend the money on digital?
-Original Message-
From: Bob Johnson [mailto:[EMAIL PROTECTED]]
Sent: Sat 4/13/2002 7:06 AM
To: [EMAIL PROTECTED]
Cc:
Subject: [RCSE] HiTech Servo's
The two best thing I saw at the Toledo Show were the smiling face of Jim
Deck at the LSF booth and the new HiTech digital wing servo. The new HiTech
HS5125MG digital servo's were available in limited supply. I purchased two
of them from Maxx Products. I also saw a non-digital version of the same
servo in the HiTech booth and was told that these should be available by the
end of the month with an approximate street price of $50.00. The non-digital
version is the HS125MG.
Regards,
Bob Johnson
Fond du Lac, WI
RCSE-List facilities provided by Model Airplane News. Send "subscribe" and
"unsubscribe" requests to [EMAIL PROTECTED]
! Ë_iȥزè¾'^u¼¡×¥*é©Þ5ì,Iéݲæìr¸y©Ýº{.nÇ+·«z«²Û-¢Ê®)àê®zËZ¶ yÊ&
RE: [RCSE] HiTech Servo's
YNT has 4 of Hitec's new DS5125 Digital Wing Servos left in-stock. If anyone is interested they can contact me offline at the email address below. Sheldon YNT uDesign You Need This! Home of the BC6 Flight Monitor A Supporter of the 2002 Soaring Nationals email: [EMAIL PROTECTED] web: www.yntdesign.com -Original Message- From: Bob Johnson [mailto:[EMAIL PROTECTED]] Sent: Saturday, April 13, 2002 10:07 AM To: [EMAIL PROTECTED] Subject: [RCSE] HiTech Servo's The two best thing I saw at the Toledo Show were the smiling face of Jim Deck at the LSF booth and the new HiTech digital wing servo. The new HiTech HS5125MG digital servo's were available in limited supply. I purchased two of them from Maxx Products. I also saw a non-digital version of the same servo in the HiTech booth and was told that these should be available by the end of the month with an approximate street price of $50.00. The non-digital version is the HS125MG. Regards, Bob Johnson Fond du Lac, WI RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
[RCSE] HiTech Servo's
The two best thing I saw at the Toledo Show were the smiling face of Jim Deck at the LSF booth and the new HiTech digital wing servo. The new HiTech HS5125MG digital servo's were available in limited supply. I purchased two of them from Maxx Products. I also saw a non-digital version of the same servo in the HiTech booth and was told that these should be available by the end of the month with an approximate street price of $50.00. The non-digital version is the HS125MG. Regards, Bob Johnson Fond du Lac, WI RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED]
