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T-REX 700 › motor shutting off in flight then comming back on
06-18-2015 06:22 PM  3 years agoPost 1
GBaker110583

rrNovice

Chandler AZ

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Hey everyone. I have a trex 700 dominator with a castle edge 160 and a scorpion HK 4525 520KV motor. I had a flight last week where the pinion grub screws fell out, so I replaced them and today I took it up to fly. Now what seems to happen is after harder collective maneuvers the motor seems to shut off for a few seconds and then come back on.

here is my set up below

Bavarian demon 3sx
castle edge 160 scorpion HK 4525 520 KV gov set up at 1900 2000 2100 HS

I did buy the scorpion and castle 160 used off here a while back. I would be happy to up load the castle logs for a second opinion but from what I saw I didn't see anything odd.

Thank you all for your help.

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06-18-2015 06:52 PM  3 years agoPost 2
knightofcarnage

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chicago

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Put up the logs and your configs for your ESC. Sounds like the cut off is kicking in. Either its a thermal issue or just settings.

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06-18-2015 07:04 PM  3 years agoPost 3
GBaker110583

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Chandler AZ

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Ok. I will download the current logs and post them up. I'll also type out a list of the setting s I have.

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06-18-2015 07:21 PM  3 years agoPost 4
GBaker110583

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Chandler AZ

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here are my current settings. how do I upload my castle logs?

Castle settings
Throttle
Vehicle type: Helicopter
Throttle type Gov mode (set RPM)
Gov Gain 15
Head speeds 1900 2000 2100
Break
Disabled
Cutoff Voltage
Auto Li-Po 4.0 (it is on the setting where I am not able to change the voltage)
Voltage cut off type: RPM Reduction Cutoff
Current Limiting: Insensitive (280A)
Current Cutoff Type: (Soft Cutoff)

Motor
Motor start power: 59
Motor Timing: 5
Direction: Forward
PWM Rate: 8Khz

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06-18-2015 07:27 PM  3 years agoPost 5
GBaker110583

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Chandler AZ

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If it would be helpful I can post all the values in question like current voltage temp so on and so forth. I just cant see how to upload the actual logs.

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06-18-2015 07:55 PM  3 years agoPost 6
knightofcarnage

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chicago

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can you post screen shots from the CC menus sorry current i don't have access to the software.

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06-18-2015 08:46 PM  3 years agoPost 7
GBaker110583

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Chandler AZ

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Here are the screen shots of my CC set up.

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06-18-2015 10:04 PM  3 years agoPost 8
GBaker110583

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Chandler AZ

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Here is a photo of the flight logs if this helps

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06-18-2015 10:45 PM  3 years agoPost 9
ticedoff8

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Morgan Hill, CA. USA

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If the motor "cuts out" and comes back on, then that is weird.

The settings:
Voltage cut off type: RPM Reduction Cutoff
Current Limiting: Insensitive (280A)
Current Cutoff Type: (Soft Cutoff)
Will define the behavior when one of these thresholds it reached.

A low flight pack battery will cause the motor to spin at a slower speed, but it will maintain that speed until the throttle channel is rest. EG: The flight pack voltage drops, the motor slows but does not cut off. To get back to full RPM, you need to hit throttle hold (0% throttle), wait about 10 seconds, the switch off throttle hold.

The Current Limiting may be something to look at.
Disable it and fly it to see if things change.

Your bullet connectors may be loose or you maybe have a bad solder joint.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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06-18-2015 11:30 PM  3 years agoPost 10
GBaker110583

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Chandler AZ

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I personally did not solder the joints and I have not learned how to solder yet.. I know NOOB lol

but I can tell you that right after this happened I landed to inspect the heli to see if I could figure out what was going on. I did check the batteries with a lipo checker and they were at 52 percent.

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06-19-2015 12:09 AM  3 years agoPost 11
knightofcarnage

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chicago

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Make sure you check the connectors first and also check your motor screws aren't too long and causing a short. What size bullets are you using and what connectors? If your are going to redo your connectors I would suggest 5.5 mm on motor and castle 6.5 connectors. Also use a torch to solder them. Its a bad idea to have the limit set to 270amps, the odd thing I notice you don't have any temp data in your graph. Is just missing? Or is the temp sensor bad? My buddy just had his 160 edge replaced by CC because the temp sensor got damaged after a crash. Are you shoure that PWM is 8 not 12 on that motor?

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06-19-2015 12:47 AM  3 years agoPost 12
GBaker110583

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Chandler AZ

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I double checked and the PWM is 8 per the scorpion website.

OK so assuming that there is a connection issue from the esc to the motor or the esc to the FBL unit what should I be looking for on the flight log? I also can email it you so you can see it first hand instead of just a picture.

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06-19-2015 12:48 AM  3 years agoPost 13
GBaker110583

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Chandler AZ

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Also the motor leads and leads off the esc are pretty short for my application and I did buy them both used.. Is there a way to get new leads installed on the esc and the motor if need be?

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06-19-2015 04:20 AM  3 years agoPost 14
GBaker110583

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Chandler AZ

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Being that my highest amp draw is only 132 and my average was only about 34 do you guys think the soldering job is a little weak and needs to be redone?

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06-19-2015 06:38 PM  3 years agoPost 15
ticedoff8

rrKey Veteran

Morgan Hill, CA. USA

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Changing to larger bullet connectors is not necessary. That is not the problem.

The only "supported" way to lengthen the motor leads or the ESC motor leads is to send them back to the manufacturer.
You could kludge something up, but it will most likely fail.

Your comment about leads being too short make me ask:
Where is the ECS mounted?
On the 700, you can mount the ECS quite close to the motor. Maybe it is getting hot due to lack of airflow.

To inspect the solder joins on the bullet connectors (and the EC5 battery connectors) you need to remove the heat shrink so you can see the solder joint.
Even then, you may not be able to tell a bad joint from a good one unless you have done some soldering yourself.
Get one of the more experienced builder / fliers in your area to help with the soldering and inspection.

I would still suggest disabling the "Current Limiting' and then fly it a couple of times. This is easy to do (if you have the CastleLink USB interface)

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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06-19-2015 09:10 PM  3 years agoPost 16
GBaker110583

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Chandler AZ

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Yeah I'm going to have the battery leads resoldered. They don't look good to me...

The esc is close to the motor at the nose of the helicopter.

At the very least I can post a pic of the leads to the ec5s

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06-26-2015 01:20 PM  3 years agoPost 17
dkshema

rrMaster

Cedar Rapids, IA

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What's with the minimum 12.9V reading captured on that plot? And why did the battery voltage take a nosedive near the end of the plot?

And where during that plot did your motor cut out?

Insensitive current limit setting doesn't look to be the problem and should be OK.

If you still have that file, email it to me so I can take a better look at it.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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06-26-2015 01:59 PM  3 years agoPost 18
rexxigpilot

rrProfessor

Florida

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GBaker110583, I recommend you turn on the temperature and ripple logging. The cut-out and 12.9V voltage appears to be at the end of the log at around the 720 second mark. This is typical of thermal shut-down on controllers with thermal protection. The castle has no such protection, only current. Temp. logging and ripple would tell us more useful information.

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06-26-2015 11:12 PM  3 years agoPost 19
dkshema

rrMaster

Cedar Rapids, IA

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How old are the batteries?

I see, looking at your setup stuff, you have Auto-LiPo cutoff enabled, and the cutoff voltage is set to 3.0 volts per cell. If you have older batteries with lots of cycles (maybe some abuse) AND you're cutting off when the cells are pretty much dead, there is a good chance one or more cells in the pack is dropping off in voltage long before the others.

Again, if you still have that file, you can email it to me.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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08-23-2015 11:41 PM  36 months agoPost 20
robheli12

rrNovice

Portland Tn

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That same thing happen to me on my blade 600. Drove me crazy but turned out one motor lead was pulling apart just enough to turn motor off then come back on.

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