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SERVO TESTER
Hi All ...
What I am looking for is an inexpensive servo tester. My plans are to be able to use it in the shop to run a servo through its full range of motion. In essence to be able to set up the throws distances properly. Now I know I can always use the transmitter. But why drag a good transmitter into a dusty and dirty workshop. Surely there must be a cheap piece of test equipment out there. |
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I think this is a great little unit that everyone should have:
http://www.hobbypeople.net/gallery/518105.asp For $20 it is the easiest and cheapest way to set up a plane that I have found. |
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id have to agree with, David DeWitt. Spoke to someone about the the fma servo lab compared to the vexa control unit, and it looks like vexa is the way to go.
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The Vexa represents the best money I have spent on a tool in years. Absolutely worth every penny. Awesome piece of gear and a great company.
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Well, it figures...I just ordered an FMA Servo Lab last week, and it will probably arrive tomorrow. Now that I have seen the Vexa, I have to have one. And if that wasn't enough, Vexa is based in Ocala, Florida, which is just over an hour away from my home. Oh well, just more money. (And yes, I'm the guy that ALWAYS gets the shopping cart with the wobbly wheel!)
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RE: SERVO TESTER
As long as we're on the subject of "servo testing", I'd actually like to test some old servos and find out their speed and torque. Do either of these two testers actually help with that or do they just find the center and maybe work the arm back and forth?
I figure the torque test should be out of possibility for any simple electrical device. It would seem that some kind of external scale would be required. But seems the speed check ought to be possible. |
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The Vexa is an excellent choice.
I've had mine a couple of years and wouldn't be without it. I have the original Servo Exciter that didn't have all the features of the current model. Greg |
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ORIGINAL: darock As long as we're on the subject of "servo testing", I'd actually like to test some old servos and find out their speed and torque. Do either of these two testers actually help with that or do they just find the center and maybe work the arm back and forth? I figure the torque test should be out of possibility for any simple electrical device. It would seem that some kind of external scale would be required. But seems the speed check ought to be possible. I have a rig for measuring transit time but it involves about $400 in test equipment. |
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How about a DIY circuit ? Anybody got one ?
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What is a DYI circuit....never seen one? Thanks Capt,n
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An FYI, on the DIY,
Do It Yourself... |
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I have the "servociser" from Maxx Products and it is one of my favorite tools. If I needed to replace it for some reason, I'd spend the extra money and get the Vexa ServoXciter.
Good flying, desmobob |
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Down and dirty Servo gear test that costs nothing.
Clamp the servo to the bench with the servo arm hanging over the side. Tie a string through the 1/2” hole in the servo arm. Tie the other end to a Coke bottle sitting on the floor. In the 1/2” hole a 50 in. oz servo should easily pick up a 2 Liter (approx 64oz) bottle full of water. Actually the servo should pick up 100oz of weight. Bill |
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Just for informational purposes, a 2 liter bottle of Coke weighs about 4 pounds 13-14 ounces or about 77-78 ounces.
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I use my 9C.
If you don't want to have your TX in the workshop then just raise the antenna and cycle the servos. |
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darock,
By golly you are correct. The density of Coke must be a little greater than water (about 13%). Who would have thunk it? Bill |
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Any other ideas on testing servos? Thanks Capt,n
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For those that don't DIY, I am selling a CD that has torque vs error signal plots for 26 popular servos. It also has current vs torque plots for about ten of those and linearity plots for about 15 of the servos.
PM me for the price |
RE: SERVO TESTER
How much more information (or usefulness) would i get by usign the Vexa vs. the FMA unit?
Considering that before (until now):D i have never tested my servos, and that everything we do requieres a learning curve... Is it features or quality of information that should convince me to buy the vexa or the FMA? |
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ORIGINAL: bob_nj An FYI, on the DIY, Do It Yourself... http://www.schumacher.clara.net/servodriver.htm Pretty simple circuit, just make sure you get the correct components. radio Shack has them. |
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ORIGINAL: SwampFlier-RCU How much more information (or usefulness) would i get by usign the Vexa vs. the FMA unit? Considering that before (until now):D i have never tested my servos, and that everything we do requieres a learning curve... Is it features or quality of information that should convince me to buy the vexa or the FMA? |
RE: SERVO TESTER
[link=http://www.rcgroups.com/forums/showthread.php?t=459568]YTV Cycler[/link]
$18 shipped in the US. Micro processor driven Center guaranteed 1.5ms Manual adjust in 1400 steps Sweep mode with 10 sweep speeds Dual servo driver Two ranges - 1-2ms and .8-2.2ms Size of a matchbook |
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Left seat, could you please give me the website of this servo tester? I can't access rcgroups.
TX |
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