|
|
Post by ohioeclipseballoontm on Oct 7, 2016 8:33:47 GMT -7
Hello! Jeremy Funk here, from the Knox County Ohio Eclipse Balloon Team. We are having an issue with our Servo #2 resetting when we launch our tracker. It resets to the left, we reset and center the dish, and the servo #2 resets to the left. This causes our dish to spin and it appears unable to locate the Iridium modem. Everything else appears to be working correctly: we show up on the tracking website, video and stills work great, etc. Any ideas? Thanks for all your help!
Jeremy
|
|
|
|
Post by David MSGC on Oct 7, 2016 8:53:40 GMT -7
Sounds like the servo lost its' initial zero position or the hub that is attached to the pan gear is spinning on the shaft it is attached to. I will check with someone who knows the antenna tracker better than I and post back here. In the meantime I would follow the instructions on how to zero the pan servo and make sure the set screw in the hub is tight preventing the hub from spinning on the shaft and try again.
|
|
|
|
Post by ohioeclipseballoontm on Oct 24, 2016 7:56:23 GMT -7
Hello!
We checked our servo setup and tested it again this weekend. The shaft on the servo is splined, so that's not causing our issue. We reset the servo to its initial zero position, and that is correct. We're at a loss as to why servo #2 keeps resetting all the way to the left. We're shooting video of the issue on Thursday, (10/27) and posting it to the forum to further clarify the issue we are having.
Any help/ideas/knowledge is greatly appreciated. We'll be testing again on 10/27. Thank you! Jeremy
|
|
|
|
Post by David MSGC on Oct 24, 2016 9:25:18 GMT -7
When you say it is reset to initial zero is it by adjusting the shaft and large aluminum colored gear on the servo or through software? This zero is the center position and not a "zero" pulse on the control center program, a zero pulse is all the way counter-clockwise. When the servo is set to its initial zero position will it go to center when using the maestro control center app on the computer? If it does not go to center when using the maestro control center than the gear and shaft are not in the proper position relative to each other and is not "zeroed". When the servo is zeroed it should be at its center position. In the control center program a very low pulse, around 200ms, will be all the way counter-clockwise. A pulse around 2.4ms will be all the way clockwise and a pulse near 1.5ms will be near center. I would use the maestro control center to turn the servo all the way clockwise and all the way counter-clockwise to see where center should be, the aluminum colored gear that meshes with the small spline coming right out of the motor is attached to a potentiometer that gives feedback to a controller inside the servo, if this gear is turned on the shaft, or not in the proper angular position relative to the shaft, the servo will "think" it is in a different position than it really is. This is the same shaft that is adjusted to get the zero/center position of the servo.
Later this week I may have some time to do the calibration based on the instructions and see if something is not clear in the documentation. If the servo is centered using a "zero" pulse it will turn all the way to the left when you try to center it. Maybe this is confused in the instructions.
|
|
|
|
Post by ohioeclipseballoontm on Oct 28, 2016 4:15:00 GMT -7
Hi David!
We were able to fix our servo issue yesterday. We "re-built" the entire package by thoroughly checking and re-checking every connection, piece of hardware, and software program. We completed a full test on the system including tracking, video streaming, and image retrieval. Our next test is streaming video!
Thanks for all your help.
Jeremy
|
|
