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Old Mar 28, 2009, 08:00 AM
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tune by tito's Avatar
USA, CA, Riverside
Joined May 2006
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Discussion
Ultra-micro servos for the Spektrum’s AR6400 and other Micro Receivers.

***I will moderate this thread from time to time so it stays on topic and concentrates on Micro servos and the connectors. If there are many details you want to talk about you design my suggestion is: Please open a separate thread and make a shortcut when you post the information here. Any messages that wander off topic will be left for a couple of days and then deleted.***

This thread is about two items:
1- Ultra-micro servos for the Spektrum’s AR6400 and others ultra micro Receivers
2- the other one is the connectors, which appear to be different from each receiver manufacturer
3- >>>>stay on topic<<<<






KRS_LNS_PZ01®™ is my Linear Servo PCB for the Park Zone plastic mechanical linear servo which is included with the Ember, Vapor, Cessna 210, Etc…
The board has a microcontroller running a P.I.D. controller with resolution of 10 bits; the PPM signal is calculate with a 16 bit timer. The servo can be reversed from the transmitter, also a pad connection is included to reverse the servo if can’t be done from the TX. The board dimensions are 14.93 mm by 11.4 mm for a total area of 170.3 sq mm, the board thickness is 0.508 mm (.020 of an inch). More info is available @ my blog.
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Old Mar 28, 2009, 08:12 AM
Inventor&Genius Extraordinary
tune by tito's Avatar
USA, CA, Riverside
Joined May 2006
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Spektrum’s AR6400 is a 6-channel ultra-micro receiver with integrated servos, a question come up @ this post;
http://www.rcgroups.com/forums/showpost.php?p=11687471&postcount=22
which ask if the Spektrum 1.5-Gram Linear Servo http://www.spektrumrc.com/Products/Default.aspx?ProdID=SPMAS2000
work with AR6300 receiver or any other receiver after the connector is replaced with the appropriated connectors used by each diverse RX (MicroInvent, Plantraco, AR6300, Etc…). A clear answer never was given by Park Zone Product Development staff if the Spektrum 1.5-Gram Linear Servo works with any other receiver after and only after a simple connector swap. Now if you check the web page for the Spektrum 1.5-Gram Linear Servo the photo and the specification have been removed, also the AS2000 Servo Reverser just looks like only swaps the cables position. Now the explanation given at the AS2000 Servo Reverser web page is;
Quote:
“The AS2000 Servo Reverser installs between the AR6400 Receiver (SPMAR6400) and the optional AS2000 servo (SPMAS2000) to reverse the direction of travel.”

The function of reversing the direction of the servo can be easily accomplish with a simple switch or by grounding a pin of the microcontroller which control the servo, but only if the servo have an active electronic device (microcontroller). Looking at the photograph of the AS2000 Servo Reverser I don’t see any bulk in the shrink rap which indicate an active device (microcontroller Pic10 or 12 with a footprint dimension of sot 23-6 or 8 pin DFN, the smaller size microcontrollers available). With this information is probable that SPMAS2000 only work with Spektrum’s receiver AR6400. This information make me think if this servo SPMAS2000 have any active electronics device in which can function like a normal servo or the PZ AR6400 carry the electronic and send two pwm signal to the motor and receive a signal for the servo position just like the one in the Park Zone Brick making the SPMAS2000 a remote motor actuator and sensor for the electronics in the PZ AR6400. If this is the way these remote servo works then it make common sense the simple servo reverser adapter. If this is not the way it work then; why the servo reverser cable????? Why not a simple switch?????

Which option is more economical and light weight?
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Old Mar 28, 2009, 08:31 AM
Inciting Riots
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Joined Dec 2006
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Who is selling you servo board, and what is the price?

I still think it is sad that Horizon didn't use the microcontroller and progammer from the DSP60 servos for their new linear design. This would have allowed reversing without the weight of the extra device. I also think it is counter productive to have the different connector, but I guess they really onl want to sell them to people buying the AR6400. I assume that after a while we'll get a micro JST version.
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Old Mar 28, 2009, 04:00 PM
Inventor&Genius Extraordinary
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USA, CA, Riverside
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Quote:
Who is selling you servo board, and what is the price?
I'm making all the development, the price will be around $20.00, remember I can't compete with Park Zone!!!

Quote:
I still think it is sad that Horizon didn't use the microcontroller and progammer from the DSP60 servos for their new linear design. This would have allowed reversing without the weight of the extra device. I also think it is counter productive to have the different connector, but I guess they really onl want to sell them to people buying the AR6400. I assume that after a while we'll get a micro JST version.
VI I hear you, will be a shame if this servo only work with Park Zone AR6400, however we can be wrong abouth this!!!!! I hope to be wrong. $19.99 is the perfect price for Park Zone servo.
more coments are welcome
best regards tito
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Old Mar 28, 2009, 05:22 PM
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Minnesota
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Hi were is there a ESC that will work with the a6300 by spectrum, the conector is odd, keep in mind it should be light and for a motor with only about 20 grams of trust. And will the 1.5 gram servo work with it? Looks like the same connector. If not can i replace the ESC built in to the a6400?
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Old Mar 28, 2009, 07:38 PM
Inventor&Genius Extraordinary
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USA, CA, Riverside
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Quote:
Hi were is there a ESC that will work with the a6300 by spectrum, the conector is odd
Spektrum have adapters for servo connections and ESC:
http://www.spektrumrc.com/Products/D...dID=SPMAJST1UL

http://www.spektrumrc.com/Products/D...ID=SPMEXJST3UL

http://www.spektrumrc.com/Products/D...ID=SPMEXJST6UL

http://www.spektrumrc.com/Products/D...ID=SPMYHJST3UL

the connector use in the Ar6300 are 1.50mm or 1.25mm Jst, I will need to be corrected here??????
connector housing: http://search.digikey.com/scripts/Dk...me=455-1160-ND

header: http://search.digikey.com/scripts/Dk...me=455-1658-ND

the connector use in the AR6400 are 1.00 mm Jst

header: http://search.digikey.com/scripts/Dk...=455-1789-2-ND

connector housing: http://search.digikey.com/scripts/Dk...me=455-1378-ND

Note JST have header from 0.023'(0.60mm) to 0.244"(6.20mm)
and housing to mach any of their connector headers, also each connector families have differents characteristics or distinctive parts.

Quote:
And will the 1.5 gram servo work with it? (Ar6300)
we don't know if will work with the AR6300 with a simple Connector change or adapter!!!!!!

Quote:
If not can i replace the ESC built in to the a6400?
we don't know if this feature will be Active(functional) when the AR6400 is release for sales!!!!!! i hope is active when sales start. if the ESC feature is active you can connect a ESC to the battery connectors of the AR6400 and PPM ESC input from the PPM output of the AR6400 ESC. you need to consider the amout of voltage the ESC output to the AR6400 need to be less than 4.2 volts.

Best regards tito
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Old Mar 28, 2009, 09:05 PM
M16 CIII/AR15/FN 2000 and PS90
Denile's Avatar
United States, AR, Waldron
Joined Jan 2005
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If the 6400 can operate other std servos using the correct connector than it stands to reason that the linear servo will work with the 6300 with the right connector. It makes no buisness sense to make a servo that works with one, the 6400 rcvr. No semi intellegent manufacturer would limit interchangability especially looking at spektrum's record. A connector is a small issue.
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Old Mar 29, 2009, 12:30 AM
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USA, CA, Riverside
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Quote:
If the 6400 can operate other std servos using the correct connector than it stands to reason that the linear servo will work
we don't know if this is tru, we know that the receiver from a Park Zone Vapor (PKZ3351) with a Green Sticker have this PPM outputs: http://www.parkzone.com/Products/Def...ProdID=PKZ3351
the description for the AR6400 is;
Quote:
Two additional servo ports
Don't give us any info if this ports are PPM or PWM for Linear servo!!!!
we are praying and hope they output PPM only and the servo work with normal PPM receiver outputs.

Quote:
It makes no buisness sense to make a servo that works with one, the 6400 rcvr.
wrong, look futaba micro receiver; when you go micro lots of thing change!!! like the connectors, the smaller you go more things have to change
http://www3.towerhobbies.com/cgi-bin...?&I=LXUDS7&P=0

Quote:
No semi intellegent manufacturer would limit interchangability especially looking at spektrum's record. A connector is a small issue.
every body make errors , the connector is a small issue for BIG manufacturer but for you and me is a Huge problem, try to get one @ Radio Shack before the close @ night. Remember you Local Hobby Shop may not stock every thing Horizon Hobby, Inc. sell!!!!!!!!
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Old Mar 29, 2009, 03:03 AM
M16 CIII/AR15/FN 2000 and PS90
Denile's Avatar
United States, AR, Waldron
Joined Jan 2005
521 Posts
"wrong, look futaba micro receiver; when you go micro lots of thing change!!! like the connectors, the smaller you go more things have to change".
I know what you are saying, Futaba simply supporting my point, their micro rcvr and servo connectors were not very popular.

As for connectors I also see that for many this could be an issue; not for me as I have access to them and the terribly overpriced tools for crimping them. I do not buy anything at radio shack there are supply wharehouses that have the correct parts. Im still trying to figure why spektrum went with the 1mm centers sure seems to be a large mistake in overall compatability.
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Old Mar 29, 2009, 03:19 AM
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Quote:
I do not buy anything at radio shack there are supply wharehouses that have the correct parts
what you said is supporting my point; you can't get this connectors from any other place except from Dedicated Hobby Shops or Digikey, Mouser, Allied Electronics, etc..
this day you can't get a simple Lm7805 voltage regulator at Radio Shack
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Old Mar 29, 2009, 10:46 PM
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AR6400 and SPMAS2000 connectors info

AR6400 and SPMAS2000 connectors info:
CONN HOUSING SH 3POS 1MM WHITE:
http://search.digikey.com/scripts/Dk...me=455-1378-ND
CONN HEADER SH 3POS TOP 1MM TIN:
http://search.digikey.com/scripts/Dk...=455-1789-1-ND
CONN TERM SH CRIMP 28-32AWG TIN:
http://search.digikey.com/scripts/Dk...=455-1561-1-ND
X-Port connector, CONN HEADER SH 4POS TOP 1MM TIN;
http://search.digikey.com/scripts/Dk...=455-1790-1-ND
CONN HOUSING SH 4POS 1MM WHITE;
http://search.digikey.com/scripts/Dk...me=455-1379-ND
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Last edited by tune by tito; Apr 01, 2009 at 05:25 PM. Reason: Extra information
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Old Mar 30, 2009, 08:38 AM
Inciting Riots
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Joined Dec 2006
9,687 Posts
Well I don't know how they managed to make a more complex crimper actually cost less, but the crimper for these connectors is only $151! That's almost reasonable especially since it looks like it does all three wires at once (could be wrong).
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Old Mar 30, 2009, 09:08 AM
Micro Addict!!!
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Vale of Shadows, Ontario, Canada.
Joined Feb 2008
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Do you have a link for that $151 crimper?
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Old Mar 30, 2009, 10:20 AM
Inciting Riots
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Joined Dec 2006
9,687 Posts
Click on one of the links above, then scroll down to the catalog page links and it will show you the part number. If you click on the Flash based interactive web page, you can click on the item that you want.

I wonder if it would crimp the ZH connectors too???
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Old Mar 30, 2009, 10:58 AM
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Vale of Shadows, Ontario, Canada.
Joined Feb 2008
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VI,
Thanks for the "How to" .....Much better than just a link.

Just checked.
Turns out that, It's $151 for the pistol grip handle only. (no die set)
They want $1153.29 for the Head adapter (SR series)
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