AEO-RC S1 Servo Tester w/ Gyro Sensor
AEO-RC S1 Servo Tester w/ Gyro Sensor


Get notified when product is back in stock:
Regular Price:$52.50
Sale Price:$36.25
You save $16.25 Over 31% saving!
Item #:88E-AEDS400-S1-ServoTester
Additional add-on (optional):
Rating:
Availability:Usually ships the next business day




AEORC



AEORC's S1 servo tester is specifically designed to accurately measure the servo speed and helps to understand the overall performance. AEORC's S1 servo tester is the first integrated servo tester in the market which allows you to measure speed, duty cycle, travel linear & range also receiver output signal and frequency.



Specifiaction:
Input voltage: 8~12V (2S lipo or 9V 2A DC power supply)
Output voltage: 5V
Output current: 1A
Accuracy: 1us +/- 10%
Weight: 21g
Size: 69x33x11mm
Operating temperature: -10~50°C
Included;
1 x Servo tester
1 x Gyro sensor
1 x voltage regulated multi-functional servo extension wire
 
Customer Review (jj604 from RCGroups.com)

The AEORC S1 Dr Servo is a tiny box using the same packaging as the clever kV meter.  It consists of a servo driver and an input for an accelerometer that you attach to the servo’s output disk/arm. That input measures the pulse position so is also used to test receiver servo outputs. It also requires an external 8-12V DC supply. They suggest a 2S LiPo, but after using it I would recommend a 3S. The lower voltage just does not seem to have quite enough headroom to supply the 5V to drive the servo at higher currents. Most folks will probably be using the BEC from their ESC to drive the servos in any case – see the three way cable description later. 


The inside of the accelerometer is just a sealed unit with a part number that I could not raise on the internet with an external diode and resistor. I suspect it is the same unit used in single axis piezo helicopter gyros. AEORC call the device a ”gyro” and I’ll do the same for simplicity. The only control is one of those 4-way joysticks with a centre push that you find on every compact digital camera. Long push to move between the 4 screens; up/down/sideways to select a value if appropriate; short push to turn the backlight on and off or start a test. In my view it would have been more logical to make the short push for menu change and long push for backlight/start. The backlight keeps going on and off when you don’t want it to and on the other hand you have to dwell on a screen to change to the next one. This results in an unwanted test starting sometimes. No big deal, and doesn’t detract from the functionality - just an irritation.

In use, you just plug in the external battery, connect the servo and gyro and stick the gyro to the servo output disk or arm with foam tape. Alternatively you can use the gyro input to test transmitter stick range and centring. There are 4 functions on the tester:

1. Display of receiver output signal pulse width to the servo channels in thousandths of mS with a default neutral of 1.500mS (handy to very conveniently check how consistent the range and neutral your transmitter channels are). A servo-plug to servo-plug cable is supplied for this and you connect the gyro channel into each receiver output in turn. The supplied connectors are Futaba style and the ridges have to be cut off to allow the plugs to line up along the edge of the S1. Minor, but irritating. This menu must also be used to set the signal pulse width to give a 60 degree rotation (since the pulse length to do that may vary from servo to servo).

2. A cycle test that logs the number of repeating input cycles together with the number of output cycles recorded by the gyro (good for testing suspect servos). It reads up to 9999999999 cycles which for a 0.1sec servo would be a total test time of about 31 years if I have done the math correctly!

3. Measurement of servo travel linearity, which is really no more than setting up 2 or 3 servos side by side and comparing them as they are driven at the same time.

4. Measurement of servo speed, which is the uniquely useful and important function of this gadget.

To measure servo speed, you first need to tell the S1 what pulse width gives 60 degrees rotation. It’s remarkably simple to position the servo over the protractor they have printed in the manual and use the joystick to move the servo from the neutral position. When the holes in the horn line up at 60 degrees, you just read off the pulse width, subtract the neutral value and adjust it on the measurement screen with the joystick. It turned out to be much easier and more consistent than I expected. My guess is it is accurate to a couple of degrees if you are careful to align your eye with the shaft of the servo on the baseline. Obsessive can set up a more accurate rig to measure rotation precisely. Then you just push the button, the servos cycles a couple of times and the time to move 60 degrees is displayed in 1/100th’s of mS (more on accuracy later). You can do 10 readings in as many seconds. If the servo doesn’t respond, a long push upwards on the joystick reverses the signal – neat.

This is the simple way, and uses an internal regulator in the S1 to provide 5V at a max of 1 Amp to the servo. If you want to measure at the “standard” 4.8V then use any of the servo connectors on the supplied three-way splitter lead which then plugs into the S1. See attached picture TestSetup.jpg. The lead contains a 220µF capacitor to provide some reserve for peak current draw and a forward connected series Schottky diode in the main lead which drops the 5V to almost exactly 4.8V and protects the S1 from external voltages from the branch leads at the same time. Very simple and clever. If you want to measure at a different voltage, say 6V or use your ESC’s BEC, then just plug an external supply into one of the three servo connectors.

Results for AEORC S1 Dr Servo

Initially, no servo worked for me without an external battery supply. Changing the 2S 1000mAh battery supply to a 9V 2.5A power supply made no difference. I measured 0.46V at the servo supply connector. AEORC were helpful and responsive but in the end I discovered the Schottky diode in the harness was assembled in reverse (it’s very hard to spot the band on the diode). Once fixed, everything worked as expected. Be worth checking if you have the same problem.
The sensor weighs 9.5g so can be used on quite small servos. There is no simple way to calculate what the inertial load of the sensor is on the servo of course so it isn’t quite “unloaded”. Here are a few sample results averaged over 6 cycles.
Using a stabilized Lab 2.5A supply:

See Table 1

Using a 40A ESC with 4S 5000mAh LiPo: BEC voltage measured at 5.16V for same servos as above.

Table1


See Table 2

Using without any external supply gives approx 4.85V at the servo.
Results without external supply for 3x Bluebird BMS-375DMG – 11.4g. 
Claimed speed at 4.8V = 130mS. Three identical out-of-the-box, unused servos.

Table2


See Table 3

For fun: Some old servos of late 70’s vintage

Table3


See Table 4

The Orbits were the ultimate small servo at the time, have served me well, and cost a fortune. They still hold up not too badly 30 years later! The Charlie’s (Cannon in kit form) were the smallest servo available and a feat in their day – but look at the response speed.

Table4


Accuracy

Like many digital display devices this one reads out to unrealistic precision. The specs say accuracy is 1µS +/- 10%. “10% of what?” is the issue. Times in µS are reasonable for measurement of signal pulse width but not servo movement. There is no information on precisely how this gadget works but I assume it just measures the time between start of acceleration and end of deceleration. There is going to be some imprecision about this no matter how good the timing circuits are. I would suggest a basic accuracy of perhaps 1 mS for servo traverse is both reasonable and entirely adequate, not the 10 µS that is displayed. I found variations over 10 cycles of less than 3 mS with a new Hitec servo on a 6V supply so I’m assuming the S1 itself is probably good for at least 1 mS accuracy and anything more is servo variation. In other words I think what the specs mean is the READOUT is good to 1 microsecond not the accuracy. In any event this is more than adequate. It’s pretty clear from the numbers above that the variation between cycles and between individual servos of the same type is significant. In general the better the quality of the servo the less variation. Those old 70’s Charlies servos I built from a kit were a wonder in their day but a HobbyKing $2.99 special leaves them for dead!

I did quite a number of tests on different servos using a variety of power supplies and I came to the following conclusions:

This is a uniquely useful device. There are other servos testers of varying complexity but all the ones I have seen are really just servo drivers. I am unaware of any other low cost device that actually measures the servo cycle speed. Be interested if anyone knows of another.

It is low cost and simple to use. Once you get the hang of it you can test a bunch of servos in a few minutes. I found surprising variation between “identical” servos and also between specified and actual performance – particularly at the low-cost generic end of the spectrum.

I’m not into helis but I know there is a great need for speed in the tail rotor servo in particular. This would seem to be a good investment there.





Our warranty/ return / exchange policy is very simple. If the item we sent you is defective when you received the shipment from us (NOT AFTER USE), you can report to us by email for return / exchange / refund arrangement.

Request(s) for return or exchange and report(s) of missing or damaged part(s) must be received within 30 days of your receipt of merchandise(s). We reserves the rights to entertain requests received thereafter.

Items returned must be in as-new conditions with the packing slips, manuals, accessories and all other items intact in original packaging. Returned merchandise must be received from our customer before we will process and ship out any replacement. All merchandise should be returned to us by shipping carriers with safe method which provides proof of shipment (just in case your item does not reach us. so you can check with your local shipping carrier.) We will not responsible for the lost of returned merchandise in shipping.

Shipping and handling charges for all orders are non-refundable, as we have paid the Post Office to send the shipment and the Post Office will NOT refund the postage cost back to us after they processed the shipment. Customer will be responsible for the return shipping cost to send return back to us. For returned merchandise that is found to be genuinely defective, we ship out replacement for free (we pay for the replacement shipping cost) and will not charge additional shipping and handling fees.

We reserves the right to return merchandise to its customer and not refund money, if we in our opinion deem that the merchandise has been used, crashed, abused, misused or modified in any form, or has been damaged by water, dust, or other contaminants.

*** All items are tested by manufactures to make sure they are working properly before we ship them to our customers.

*** Please inspect the product when you received the shipment, identified any issue and report to us BEFORE you try to fly / use it. Please also check over the product (especially the helicopters and air planes) and make sure they are all good every time before use (or taking to the air).

*** Return / exchange / refund is not allowed if the item has been used or flew. Please understand that RC helicopters and airplanes can crash if mistake made or you do not know how to fly, any kind of crash or hard landing may caused damage(s) to the helicopter or plane. We have no control over your flying skill, behavior or the conditions you have chosen to fly in. We tested all products before shipment as we stated above, if you have any problem with the aircraft or other product(s) you ordered from us, please report it at the time when you received the shipment (not after use please).

*** If you used / flew the product, or crashed product, no matter what the reason. We are sorry but we can not be responsible for your crash or use. Hobbypartz.com will not be responsible for incidental or consequential damages including bodily injuries and property damages arising from the use of any product(s) that it sells. Hobbypartz.com reserves the right to refuse service to anyone. Remote controlled products and accessories can be very dangerous.  Please read the operating manual before use.  We have no control over the correct use, installation, application, or maintenance of our products, no liability shall be assumed nor accepted for any damages, losses or costs resulting from the use of the products. Any claims arising from the operating, failure or malfunctioning etc. will be denied. We assume no liability for personal injuries, property damages or consequential damages resulting from our products.

*** These terms applied to all sales made from our website, email, phone, or fax. If you do not agree to our terms, please do not make the order.

We reserves the right to amend this policy without further notification(s).


To experience 5-Star Customer Service & Tech Support from HobbyPartz.com, visit us at RCDiscuss.com

 


HobbyPartz Clearance Deals
HobbyWing eZRun-35A Brushless ESC for 1/10 Car (Version 2) w/ Reverse programming
Regular Price: $69.00
On Sale Now: $31.99
You save 54%
Out of Stock!
STAYPRO 45G HD-DVR 5-MegaPixel Micro FPV Video Recorder w/ HDMI 1280 x 720 30fps
Regular Price: $59.00
On Sale Now: $39.95
You save 32%
Hidden Covert Camera, Great for First Person View Camera system for RC Planes, Cars, Helicopters
Regular Price: $17.50
On Sale Now: $13.00
You save 26%
Detrum GY48V Head-Lock Gyro for 3D RC Helicopters
Regular Price: $19.95
On Sale Now: $12.95
You save 35%
ARF Foam Field Stand-Green
Regular Price: $29.95
On Sale Now: $14.90
You save 50%
64mm 12 Blade Fan Unit for Electric Ducted Fan Jet
Regular Price: $19.95
On Sale Now: $12.95
You save 35%
Out of Stock!
HobbyPartz 2-Meter Warm-White LED-120 Lights
Regular Price: $24.95
On Sale Now: $11.95
You save 52%
Dynam Brushless Motor (3000kv)
Regular Price: $29.00
On Sale Now: $19.00
You save 34%
1/10 Touring Car Run Flat Tire Black
Regular Price: $4.95
On Sale Now: $4.00
You save 19%
Out of Stock!
Dynam Motor ESC Combo  BM2826D-KV3000+60A ESC for 70MM EDF Jets
Regular Price: $49.95
On Sale Now: $34.95
You save 30%
Exceed RC Rocket 2205-1600KV Brushless Motor for RC Plane
Regular Price: $29.95
On Sale Now: $12.95
You save 57%
Tail rotor blade for Exceed RC 40 or Compatiable RC Helicopters
Regular Price: $5.00
On Sale Now: $0.77
You save 85%
Training Gear Sets for All Kinds of RC helicopters
Regular Price: $10.00
On Sale Now: $3.00
You save 70%
Tacon 3650-11T Brushless Motor 3200KV for 1/10 On-Road RC Car
Regular Price: $49.95
On Sale Now: $24.09
You save 52%
Exceed RC Proton 12A ESC Brushless Electronic Speed Controller
Regular Price: $19.95
On Sale Now: $10.95
You save 45%
Solar Servo A106 Analog 9g  0.12@4.8v Micro Servo
Regular Price: $11.95
On Sale Now: $4.14
You save 65%
HobbyWing Program Card for ESC RC Plane
Regular Price: $15.00
On Sale Now: $6.99
You save 53%
Exceed RC Rocket 4120-400KV Brushless Motor for RC Plane
Regular Price: $79.00
On Sale Now: $38.50
You save 51%
Main rotor blades for Walkera Genius CP RC Helicopter
Regular Price: $6.97
On Sale Now: $5.00
You save 28%
Gens Ace 4mm Banana Battery Connector
Regular Price: $4.00
On Sale Now: $2.00
You save 50%
Exceed RC Rocket 2205-1400KV Brushless Motor for RC Plane
Regular Price: $29.95
On Sale Now: $12.99
You save 57%
Out of Stock!
Li-poly Spare Battery for Syma S33 RC Helicopters
Regular Price: $12.50
On Sale Now: $6.66
You save 47%
Out of Stock!
HobbyPartz Red LED-30 Lights
Regular Price: $7.99
On Sale Now: $3.50
You save 56%
HobbyPartz Blue LED-240 lights
Regular Price: $49.00
On Sale Now: $24.00
You save 51%
Tacon 3650-10T Brushless Motor 3500KV for 1/10th On-Road RC Car
Regular Price: $49.95
On Sale Now: $24.09
You save 52%
Exceed RC Proton 40A ESC Brushless Electric Motor Speed Controller
Regular Price: $49.95
On Sale Now: $27.95
You save 44%
Dynam Motor ESC Combo BM2810A-KV810+25A ESC for 3D Planes
Regular Price: $39.95
On Sale Now: $24.95
You save 38%
Solar Servo D770 High Voltage Low Profile .06sec@7.4v Digital Metal Gear 47g
Regular Price: $29.95
On Sale Now: $17.95
You save 40%
High Performance Brushless T-Motor MT4006 740KV for Quadcopter/Multi-Rotor
Regular Price: $124.35
On Sale Now: $82.90
You save 33%
Sky RC Charger 6200 200W Multifunction LiPo/LiFe(1-6S) NiMH/NiCD(1-18S) DC Charger/Balancer
Regular Price: $84.95
On Sale Now: $44.95
You save 47%
GENS ACE 5000mah 3S1P 11.1V 40C hard case Lipo battery Racing Approved Batteries
Regular Price: $62.67
On Sale Now: $50.00
You save 20%
Out of Stock!
GENS ACE 5000mAh 2S2P 65C Lipo RC Battery (Hardcase)
Regular Price: $89.00
On Sale Now: $60.00
You save 33%
GENS ACE 3800mah 4S1P 14.8V 25C Lipo battery pack
Regular Price: $56.70
On Sale Now: $49.95
You save 12%
Gens Ace LIPO  Battery 1200mah  22.2V 40c
Regular Price: $24.00
On Sale Now: $22.00
You save 8%
HD 720p Dice Mini Camera with Night Vision LxWxH: 1 3/8"x1 3/8"x1 1/4"
Regular Price: $69.95
On Sale Now: $34.95
You save 50%
Mini Sport Camera w/ WiFi Pro Version HD
Regular Price: $199.00
On Sale Now: $99.00
You save 50%
8-Pack AA 2200mAh NiMH Rechargerable Battery
Regular Price: $19.95
On Sale Now: $10.90
You save 45%
HobbyWing 1/8 Scale C-Xerun 150A Brushless ESC
Regular Price: $129.95
On Sale Now: $99.00
You save 24%
Out of Stock!
Fly Sky CT6B 6-Ch 2.4Ghz Radio Remote Transmitter w/ Receiver * Brand New Complete Exceed RC OEM Remote System
Regular Price: $99.00
On Sale Now: $44.95
You save 55%
Thunder 1030 Charger 1000 Watt 30 Amps
Regular Price: $249.00
On Sale Now: $139.00
You save 44%
Sky RC E3 2-3S Lithinum 100-240v Balance Charger
Regular Price: $19.95
On Sale Now: $9.70
You save 51%
Out of Stock!
EXI Aluminum Helicopter Carrying Case Perfect For 450 Class Helicopters
Regular Price: $79.00
On Sale Now: $34.95
You save 56%
Tail motor heat-sink for Esky RC Helicopters
Regular Price: $3.00
On Sale Now: $0.55
You save 82%
Main blade grip set for 9053 RC Helicopter
Regular Price: $5.00
On Sale Now: $0.55
You save 89%
50H08-01 Main Rotor Blade
Regular Price: $13.00
On Sale Now: $4.00
You save 69%
Suggested by HobbyPartz
8-Pack AA 2200mAh NiMH Rechargerable Battery
Regular Price: $19.95
On Sale Now: $10.90
You save 45%
JumpStart Intelligent Fast Charger for AA & AAA NiMH Batteries
Regular Price: $19.95
On Sale Now: $12.77
You save 36%
Out of Stock!
2.4G Fly-Sky (FS) CT6B 6-Channel Transmitter+Receiver (R6B)
Regular Price: $79.00
On Sale Now: $39.00
You save 51%
FlySky FS-T6 2.4ghz Digital Proportional 6 Channel Transmitter and Receiver System
Regular Price: $99.00
On Sale Now: $54.95
You save 44%
Thunder AC6 Smart LiPo Balance Charger/Discharger w/ AC Adapter for 1-6 Lipo/ 1-15 Nimh + USB to PC Software
Regular Price: $99.95
On Sale Now: $48.95
You save 51%
FLY SKY FS-GT3B Digital 3-Channel 2.4ghz TX & RX LCD Transmitter & Receiver
Regular Price: $79.95
On Sale Now: $39.95
You save 50%
First Person View System with Sony CCD image Sensor Camera
Regular Price: $499.00
On Sale Now: $289.00
You save 42%
FLY SKY FS-iT4 4-CH 2.4ghz Telemetry RC Radio Control Transmitter w/ LCD Touch Screen (Orange)
Regular Price: $249.00
On Sale Now: $139.95
You save 44%
FLY SKY GT3C 2.4ghz 3-Channel Radio Transmitter and Receiver w/ LCD+Lipo Battery and Charger
Regular Price: $99.00
On Sale Now: $54.00
You save 45%
FS-TH9X 2.4GHz 9CH Transmitter - RC Helicopters/ Airplanes Transmitter Receiver
Regular Price: $199.00
On Sale Now: $89.00
You save 55%
GENS ACE 5000mAh 50C 7.4V Hardcase Lipo Battery Pack ROAR Racing Approval (Direct)
Regular Price: $79.00
On Sale Now: $47.00
You save 41%
Sky RC Charger 6200 200W Multifunction LiPo/LiFe(1-6S) NiMH/NiCD(1-18S) DC Charger/Balancer
Regular Price: $84.95
On Sale Now: $44.95
You save 47%