Xicoy - LG15 Gyro Controlled Brakes
07-05-2020, 08:43 AM
#326
I am installing the LG15 on a Ultraflash with JP retracts.
I have an odd situation where one side of the brakes slowly decreasing to zero while holding brakes full while static on the bench. I swapped left and right and the effect still occurs on the same side. This seems to be solely dependent on the use of steering gain on the brakes config page. The higher the brake steer gain, the faster the fade/decrease on one side. Changing the brake steer gain from positive to negative changes the side it occurs. Set brake steer gain to zero and reboot will eliminate the issue and the brakes hold as commanded. Any ideas?
As an install note, I had to remove the permanent magnets in the wheel hubs to get consistent proportional braking and widen the servo channel band where it is proportional.
I have an odd situation where one side of the brakes slowly decreasing to zero while holding brakes full while static on the bench. I swapped left and right and the effect still occurs on the same side. This seems to be solely dependent on the use of steering gain on the brakes config page. The higher the brake steer gain, the faster the fade/decrease on one side. Changing the brake steer gain from positive to negative changes the side it occurs. Set brake steer gain to zero and reboot will eliminate the issue and the brakes hold as commanded. Any ideas?
As an install note, I had to remove the permanent magnets in the wheel hubs to get consistent proportional braking and widen the servo channel band where it is proportional.
07-05-2020, 09:00 AM
#327
I am installing the LG15 on a Ultraflash with JP retracts.
I have an odd situation where one side of the brakes slowly decreasing to zero while holding brakes full while static on the bench. I swapped left and right and the effect still occurs on the same side. This seems to be solely dependent on the use of steering gain on the brakes config page. The higher the brake steer gain, the faster the fade/decrease on one side. Changing the brake steer gain from positive to negative changes the side it occurs. Set brake steer gain to zero and reboot will eliminate the issue and the brakes hold as commanded. Any ideas?
As an install note, I had to remove the permanent magnets in the wheel hubs to get consistent proportional braking and widen the servo channel band where it is proportional.
I have an odd situation where one side of the brakes slowly decreasing to zero while holding brakes full while static on the bench. I swapped left and right and the effect still occurs on the same side. This seems to be solely dependent on the use of steering gain on the brakes config page. The higher the brake steer gain, the faster the fade/decrease on one side. Changing the brake steer gain from positive to negative changes the side it occurs. Set brake steer gain to zero and reboot will eliminate the issue and the brakes hold as commanded. Any ideas?
As an install note, I had to remove the permanent magnets in the wheel hubs to get consistent proportional braking and widen the servo channel band where it is proportional.
07-05-2020, 12:50 PM
#328
Thread Starter
I’ve found that the touch screens need to be calibrated fairly often. Fortunately, it’s easy to do. Hold pressure on the screen (with a stylus) and apply power, then follow the on screen directions.
07-05-2020, 04:02 PM
#329
My Feedback: (1)
I took out all the steer trim and rebooted it after a set of changes. it seems that some changes will take effect without rebooting but the brake steer gain change woudl cause the issue I had. Rebooting alleviated the behavior. I could duplicate the reboot (no issue) or no reboot (one side would drop to zero) consistently when changing the brake steer gain.
07-12-2020, 06:05 AM
#333
Thread Starter
Have you tried adjusting the limit on the side that drags? On one of my T1 minis I have one wheel adjusted to only 70% limit while the other wheel is 100%.
07-12-2020, 07:08 AM
#335
Silly question, but does it drag in the vertical position (gear down), because mine drag in the horizontal position (gear up) but not vertical. Also if I roll the plane backwards sometimes it will drag on one side but not forwards... I had a problem with one side not engaging after I took them apart and took out the magnets. One of the axels had slid slightly and I had to reset it back and then it worked fine. They are a crappy design, they should have put some sort of light spring in there instead of the magnets to keep the disc from dragging or something.
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Dansy (07-12-2020)
07-12-2020, 07:38 AM
#337
Thread Starter
did you make sure not to drop the tiny shim When you took the wheel apart? If the shim is missing it will cause the wheel to drag.
07-12-2020, 11:05 AM
#338
My Feedback: (64)
I also have an Ultra Flash with JP retracts and LG15. The gear work perfectly on the ground....but once airborne, at least one gear goes not full retract most of the time. If I drop to landing flaps and slow the plane way down, they will full retract. Everything seems to be aligned correctly. Is air pressure stalling the gear? Do I just need to increase Amperage? Does anyone know where amps should be set for the mains? Thanks in advance!!
07-12-2020, 12:03 PM
#339
My Feedback: (53)
I also have an Ultra Flash with JP retracts and LG15. The gear work perfectly on the ground....but once airborne, at least one gear goes not full retract most of the time. If I drop to landing flaps and slow the plane way down, they will full retract. Everything seems to be aligned correctly. Is air pressure stalling the gear? Do I just need to increase Amperage? Does anyone know where amps should be set for the mains? Thanks in advance!!
The retract of our ER-150 start max current is about 1.2A. the working current is about 0.8A. not suggest to use with other brand controller
07-12-2020, 12:09 PM
#340
I also have an Ultra Flash with JP retracts and LG15. The gear work perfectly on the ground....but once airborne, at least one gear goes not full retract most of the time. If I drop to landing flaps and slow the plane way down, they will full retract. Everything seems to be aligned correctly. Is air pressure stalling the gear? Do I just need to increase Amperage? Does anyone know where amps should be set for the mains? Thanks in advance!!
jp seem to work better on these voltages.
dansy is correct Stall is about 1.1 and max is 0.8 on use.
however when its "braked by air"stall voltage go up to 2 amps easy.
07-12-2020, 01:26 PM
#344
My Feedback: (53)
i run mine on 2s lipo...
07-12-2020, 03:19 PM
#347
Thread Starter
You doubt the 7.5v limit even after I posted photos of my volt meter measuring the output voltage on my JP controller? If you don’t agree that’s fine, but it would really be more constructive to actually do you own experiment, like I did, and simply post your findings rather than pontificate on your gut feel. -Tom
07-12-2020, 03:46 PM
#348
You doubt the 7.5v limit even after I posted photos of my volt meter measuring the output voltage on my JP controller? If you don’t agree that’s fine, but it would really be more constructive to actually do you own experiment, like I did, and simply post your findings rather than pontificate on your gut feel. -Tom
07-12-2020, 05:08 PM
#349
Thread Starter
I have an email from JP direct. Current production retract motors, unless otherwise stated, are rated for unregulated lipos. Yes voltage value in is the voltage value out on their, and xicoy controllers. And JP states that 2s lipo no problem. Even their controllers show 7.2v-8.4v on their input port.
07-12-2020, 05:15 PM
#350
My Feedback: (53)
You doubt the 7.5v limit even after I posted photos of my volt meter measuring the output voltage on my JP controller? If you don’t agree that’s fine, but it would really be more constructive to actually do you own experiment, like I did, and simply post your findings rather than pontificate on your gut feel. -Tom
And I didn’t remember.....I don’t normally remember things that I read but has no impact on my setup....I’m on electron now anyway....