Jim Mahoney
Senior Member
Posts: 2243
Loc: California
Reg: 06-17-03
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 06-05-06 02:49 PM - Post#74429
Hello All,
I have seen the Name SENECA and RCHELISPOT Mentioned a few times so I went for a look - and I found an interesting post with information on an Open Digital Servo Project!
Check out: www.openservo.com
Interesting information for those interested in the electronics end of our hobby.
Other interesting post that I looked at quickly were on the subject of CSM Gyros, RCHELISPOT is another forum but the more the better - you get a different mix of ideas and more information good for us all - even for Mike The Hat Man Mas! 
Happy Flying,
Cherokee Jim Mahoney 
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SENECA
Senior Member
Posts: 1061
Loc: 47,000 feet
Reg: 11-09-00
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06-05-06 08:28 PM - Post#74437
In response to Jim Mahoney
Hey I know that guy your refering to in your post (he is a total "doooshbag". 
Cool site you found there also...both of them. 
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Anonymous
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06-05-06 09:13 PM - Post#74440
In response to SENECA
What's the point of an open servo?
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SENECA
Senior Member
Posts: 1061
Loc: 47,000 feet
Reg: 11-09-00
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06-05-06 09:16 PM - Post#74441
In response to Buddykitchen
Quote:
What's the point of an open servo?
I dont really know,but I bet I know where you can find out.
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chase
Senior Member
Posts: 1643
Loc: Oklahoma city
Reg: 03-20-05
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06-05-06 10:44 PM - Post#74443
In response to SENECA
Someone say hats?  That should be a forbidden word on here.
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Jim Mahoney
Senior Member
Posts: 2243
Loc: California
Reg: 06-17-03
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06-05-06 10:45 PM - Post#74444
In response to Buddykitchen
Hey BuddyKitchen,
You ask that question but I know you know the answer - those interested in the electronics of our hobby/obsession like this kind of information. Who knows who will be inspired by such to go on to design something. It seems that folks into robotics are willing to build and design there own equipment - a creative activity once shared by the R/C Airplane types. Of course now we have great equipment but there are some who may say to themselves "I can do it better, and then try!
Happy Flying,
Cherokee Jim Mahoney
Multiplex - ACT Radios, Youngblood Gyros & Governors, YS Engines, Blitz AVRO 90 - Phoenix Simulator - A123 Batteries - Mikado Helicopters - Hacker Motors & Controllers
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Jim Mahoney
Senior Member
Posts: 2243
Loc: California
Reg: 06-17-03
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06-05-06 10:51 PM - Post#74445
In response to SENECA
Quote:
Hey I know that guy your refering to in your post (he is a total "doooshbag".
Now is that straight form the Horse's Mouth or What?
Seneca don't be so hard on yourself - Leave that to others - just keep your website going and giving us a different view and keep the information coming.
Happy Flying,
Cherokee Jim Mahoney
Multiplex - ACT Radios, Youngblood Gyros & Governors, YS Engines, Blitz AVRO 90 - Phoenix Simulator - A123 Batteries - Mikado Helicopters - Hacker Motors & Controllers
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Jim Mahoney
Senior Member
Posts: 2243
Loc: California
Reg: 06-17-03
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06-05-06 10:54 PM - Post#74446
In response to Jim Mahoney
BuddyKitchen think of Open Servo as in Open Software, e.g., Linux Operating System - A way to fight the Evil Empire!
Happy Flying,
Cherokee jim Mahoney
Multiplex - ACT Radios, Youngblood Gyros & Governors, YS Engines, Blitz AVRO 90 - Phoenix Simulator - A123 Batteries - Mikado Helicopters - Hacker Motors & Controllers
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Anonymous
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06-05-06 10:54 PM - Post#74447
In response to Jim Mahoney
Quote:
You ask that question but I know you know the answer - those interested in the electronics of our hobby/obsession like this kind of information.
No seriously, Jim. What is an "open servo"? I don't understand what they're doing on that site... are they just demonstrating how to convert a normal analog servo to a digital one?
What does the "open" in the phrase "open servo" refer to?
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Jim Mahoney
Senior Member
Posts: 2243
Loc: California
Reg: 06-17-03
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06-05-06 11:32 PM - Post#74448
In response to Buddykitchen
I think the best I can say is "the sharing of design information and techniques" - the project starts out and everybody has access to what others are doing - one person writes some code, say for a PID Control Loop and puts it out for all to see and then another person looks at it and changes the PID Control Loop routines because he has experence with such control loops and knows how to write code that runs faster or which has better control resolution - then another person sees this and adds "Addaptive PID Tuning" to realize better performance for nonlinearity in the system ... and so on.
At this point the Robotics Folks (Hobbyest and the Obcessed) are in the learning phase and are still happy to share what they know - None of the Dark Force has moved in to make Big Money yet so the folks are excited to share and learn.
Happy Flying,
Cherokee Jim Mahoney
P.S. I have contacts in France still looking for the posters, the only way I found to get some was to join the Foreign Legion myself, at my age - no way, besides my wife just wouldn't understand why I would join the Legion for 5 years to get something for a guy who uses a Cow for his Forum Symbol! Hmmmm if I hadn't already gotten my Hat I could, in addition to the posters, get a "Cap Blanc".
Happy Flying,
Cherokee Jim Mahoney
Multiplex - ACT Radios, Youngblood Gyros & Governors, YS Engines, Blitz AVRO 90 - Phoenix Simulator - A123 Batteries - Mikado Helicopters - Hacker Motors & Controllers
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Steve Walker
Senior Member
Posts: 397
Loc: Cincinnati, Ohio USA
Reg: 07-24-01
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06-06-06 07:09 AM - Post#74465
In response to Jim Mahoney
And then Rockwell Software (aka. Allen-Bradley) starts selling it. It's called RSTune...
About all you can hope for Buddy is that Airtronics gets hold of the platform!
- Steve
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Anonymous
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06-06-06 01:48 PM - Post#74475
In response to Steve Walker
Hell, I'm still waiting for someone to explain to me - in common everyday language - what the hell they're doing on that website.
What is an "open servo"?
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Jim Mahoney
Senior Member
Posts: 2243
Loc: California
Reg: 06-17-03
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06-06-06 02:00 PM - Post#74478
In response to Steve Walker
Allen-Bradley! Now there's a company that has a warm spot in my and many other Electronicers mainly in the form of Allen-Bradley Carbon Composition Resistors --- The Best Carbon Composition ever made! When I was in the Army I sent off for information on said resistors and I received a very nice letter and more than 25 pages of data, graphs, and measurement techniques for Allen-Bradley Carbon Composition Resistors!
You can still buy Allen-Bradley resistors today but at 50 cents each comparied to less than 1 cent each for a carbon film resistor.
In any case before I get too worked up over AB resistors check out the Allen-Bradley RSTune info:
RSTune -- Allen-Bradley
Happy Flying,
Cherokee Jim Mahoney
Multiplex - ACT Radios, Youngblood Gyros & Governors, YS Engines, Blitz AVRO 90 - Phoenix Simulator - A123 Batteries - Mikado Helicopters - Hacker Motors & Controllers
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Jim Mahoney
Senior Member
Posts: 2243
Loc: California
Reg: 06-17-03
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06-07-06 04:16 PM - Post#74539
In response to Buddykitchen
Hey Buddy Kitchen,
Quote:
Welcome
OpenServo is an open project with the goal to create a digital servo for robotics that is free for anyone to use and modify to meet their particular needs. It is currently being developed by a small group of dedicated individuals striving to maintain the very best in free, open source software and standards. We hope that you will find the OpenServo project interesting and become a member of our community.
Buddy that opening statement about says it all --- A collection of technical guys and gals getting togather to create a Digital Servo for all to use or modify to their taste. The exchange of ideas, information and techniques. Guys and gals having fun in creating something. Guys and gals learning the creative process by getting involved in the process.
Why we helicopter types could get together and create the Open Gyro Project or the Open 2 or 3-axis stabilization Project OR the OPEN SOFTWARE PROJECT for the Airtronics or Multiplex Transmitters! Adding new mixer techniques, added channels, etc. Why should we be at the mercy of R/C Manufacturers or evil empires and have to wait 5 or ten years for small improvements for our software?
BK be strong - stand up and walk away from the heard --- join the Pack or if you are really strong become the Lone Wolf! Leader of the Pack.
Happy Flying,
Cherokee Jim Mahoney
Multiplex - ACT Radios, Youngblood Gyros & Governors, YS Engines, Blitz AVRO 90 - Phoenix Simulator - A123 Batteries - Mikado Helicopters - Hacker Motors & Controllers
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Anonymous
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06-07-06 04:24 PM - Post#74540
In response to Jim Mahoney
Oh, so it's just a group of individuals wanting to design digital servos that they themselves can modify/improve, without having to reverse engineer another manufacturer's design?
I think I get it now. I thought "open servo" was referring to a type of servo... like a linear servo or something like that.
"Open", in this case, just refers to a non-proprietary design, open to anyone who wants to try and improve the design?
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Jim Mahoney
Senior Member
Posts: 2243
Loc: California
Reg: 06-17-03
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06-07-06 05:30 PM - Post#74544
In response to Buddykitchen
Just Like you said!
Speaking of linear servos there were many linear servos in the early days, now none. Mike spoke in one od his articles of the need for a good linear servo - traditional type or as I think a ball-screw type, as used on the Yamaha helis.
There will two great improvements in servos to come:
Contactless Feedback to replace currently used pots
Brushless DC Motors
These are high failure items, either out right failure or loss of performance.
Happy Flying,
Cherokee Jim Mahoney
Multiplex - ACT Radios, Youngblood Gyros & Governors, YS Engines, Blitz AVRO 90 - Phoenix Simulator - A123 Batteries - Mikado Helicopters - Hacker Motors & Controllers
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Anonymous
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06-07-06 05:46 PM - Post#74546
In response to Jim Mahoney
I don't understand why there isn't a viable linear servo on the market. Yes, I'm aware of the design difficulties of producing a slop-free linear servo, but I would have thought that the preponderance of CCPM would have driven the market towards that end.
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Jim Mahoney
Senior Member
Posts: 2243
Loc: California
Reg: 06-17-03
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06-09-06 05:59 AM - Post#74614
In response to Buddykitchen
The R/C industry is Very Slow to come out with anything new! They feel there is no money in high end radios - I hear the new Futaba radio cost 3 million in R/D cost alone - they may never get their money back - it is more like an advertisement cost - having a great flag ship.
The old style linear servo was sloppy but it could be made to work. A jackscrew linear servo might be the ticket.
Any of our inventors got any ideas?
Happy Flying,
Cherokee Jim Mahoney
Multiplex - ACT Radios, Youngblood Gyros & Governors, YS Engines, Blitz AVRO 90 - Phoenix Simulator - A123 Batteries - Mikado Helicopters - Hacker Motors & Controllers
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Topcat
Senior Member
Posts: 905
Loc: NW Indiana
Reg: 12-10-02
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06-12-06 11:39 AM - Post#74680
In response to Jim Mahoney
Reading this section I ran into PID loops and adaptive tuning. 2 4 ton calenders *hollow steel rolls* heated with oil through a pump system. temp controllers with pid loops and adaptive tuning to control the heat within a few degrees. worked on it all friggin week finally getting it to stay with in a few degrees of setpoint. Forgot most of what I was taught on pid loops back in college.
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