Converting my CS gimbal to a brushless gimbal

Steve you should be a very happy man. That was great! All it takes is a little time and patience. Alexmos can have equal performance to Movi in the air if you put in the necessary work tuning which in my own opinion is no different than the time needed to setup a Movi. As for horizon roll during fast pans, I've seen Movi do this as well. Slow down your pans and you won't have that issue besides you won't ever need to pan that fast while onset filming.

What changes have you made from the last video?

 

Thanks, man! I agree. I’ve seen some pretty questionable footage in some MōVI clips, even in handheld work. And I’ve seen precious little decent aerial work. I think the reason for the scarcity of MōVI MR stuff is there just aren’t that many out there, and it’s still really hard to get a good, reliable, stable platform up there. Those of us who have been working a lot on our copters have a leg up. There’s no “plug-and-play”, even if you spend a boatload of money.

Backed off on my gains a bit as per Fabian’s instructions (found this on the forum http://bit.ly/18Ofm2c ...it’s great).Also, I got the roll (pitch) working from my transmitter (just had to add a ground wire...duh) so now I can actually aim my camera. And today I’m going out with the FPV working again, so I’m hoping to get some footage of something other than the parking lot and my own head.

 

Are you guys using lenses with stabilization on Red cameras mounted on brushless gimbals?

 

Thanks Bill!

A few things here...
I talked to Grayson at Brushlessgimbals.com and he said the 8108 is the same motor as the gb-85 except that it has a dust cover.


I have the exact 8017 and pulley pan axis that you suggested to another someone else from aliexpress. I am getting a stair stepping effect when I pan left or right. I have heard this is a problem with belt reduction. What is the remedy for that?
I multiplied the 28 poles times 4 which is the number of times the motor spins for 1 rotation of the main hub. I dropped my power to 150 and my PIDs to 9 0.2 17 with gyro high sensitivity on. What are your thoughts?
Thanks in advance!

 

wow steve that is really awesome!!!

 

So here’s some actual flying footage, rather than flying in circles around my own head. This was all filmed at pretty high altitude (6000-9000 feet) with some pretty windy conditions. I did use some Warp Stabilizer, as things got a little hairy in some places. But the gimbal’s doing great. Thanks again to everybody here...can’t wait to do some more!

 

Steve it looks great man!! Congrats!!!!!

 

Thanks, Dave.

Next on the agenda is to try and get a 3rd axis up and running. However, I am concerned I’m running out of GVW for my motors. In the X8 config I’ve lost quite a bit of horsepower, and the QC3328 motors may not be up to the task. So if I go to the 3rd axis (and landing gear, etc) I may have to go back to the flat 8. Or, it may be time for the heavy lifter.

Here’s what my GPX header looks like. As you can see, I’m pushing some serious power. Of course, this was at 8000’ ASL, so maybe I should hold out hope that back at sea level in Half Moon Bay I’ll be better off. I also have to mess with the mixer settings a bit. My bottom motors 5-8 (which are set to 71) can be backed off a little, I think.

MK Version: FC HW:2.2 SW:2.02a + NC HW:2.0 SW:2.02a​

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Flight date: 12/27/2013 10:11:08 AM​

Flight time: 10:11:08 AM - 10:17:15 AM (367 secs, 00:06:07)​

Batt. time : 365 secs, 00:06:05​

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Elevation(GPS) : 0.172 20.94 40.81 m (min/avg/max)​

Altitude(Barom.): -2.4 19.4 40.55 m​

Vertical speed : -2.74 -0.09 2.82 m/s​

Max speed : 39.3 km/h​

Max target dist.: 0 m​

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Sats : 10 9 11​

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Voltage : min. 13.7, max. 15.4 V​

Current : 0.5 87 123.8 A​

Wattage : 7 1264 1696.06 W​

Capacity: 8969 mAh​

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Motor1: 0.3 8.6 14.5 A Temp: 14 30 53 °C​

Motor2: 0.0 9.4 14.0 A Temp: 14 32 49 °C​

Motor3: 0.0 10.2 19.4 A Temp: 14 37 51 °C​

Motor4: 0.0 11.0 15.8 A Temp: 20 44 52 °C​

Motor5: 0.0 11.6 20.1 A Temp: 15 46 57 °C​

Motor6: 0.0 13.3 22.0 A Temp: 13 48 61 °C​

Motor7: 0.1 10.0 17.0 A Temp: 11 36 56 °C​

Motor8: 0.5 11.2 17.5 A Temp: 16 38 54 °C​

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Magnet Field: 89 97 111 % (ok)​

Magnet Inclination: 48 57 74 deg​

 

Steve whats your hover throttle at?

 

Steve: WOW dude! That is some smooth video! You guys are blazing a trail for us! Thanks.

 

I'll let you know when I get back to sea level.

 

Hi Kari

Thanks for your tips. They are greatly appreciated. Where did you get the aluminium booms in the right diameter?

Abut the flight: It was a quick test flight and I think I was not above those kids. Maybe I was then. It definitely is against my safety principles to fly above kids or people in general. Must be more careful next time.

@ Bill: Do you think Famous Hobby will send the pan reduction thingy you linked without the motor as I already have it. I wrote them but not reply at least yet.

 

Bill, did you try those GB100 motors? How do you like it? And also PM motors.

 

Hi Bill,

Have you tried the PM60 yet. I know they say it is a PMSM and should be smoother but I can't find much info from reliable sources that have actually used the PM60 or PM57. Which controller are you using for the PM60?

 

Thank Bill,

Do you have any instructions on what to do with the fourth wire and its function?

I am confused because looking at the pictures and drawings it looks like the PM60 has 4 wires and the PM57 has three wires. I know the ranger gimbal is shipping with the PM57 but I don't know if there is an extra wire addded for "mtr ground" or if the PM57 only needs three wires.

I have tried asking the company but never get a useful answer.

 

@Sam

Did you manage to improve the pan with the new settings? I am about to buy the Aliexpress pulley, but maybe not if it does not work.
Presently I have the direct drive pan axis cage for 8017 from brushlessgimbals.com