06-16-2020, 04:05 PM | #1 |
Rock Crawler Join Date: Jul 2010 Location: Great Britain
Posts: 767
| Micro servo
So one of my diff servos failed so I changed both for jx pdi 1151mg servos, plenty of torque and waterproof fitted then and was all fine, put rx lid on and both died can't believe it, tried other electrics in the slots and they worked so it's just the TWO servos. Most bizarre was running 7. 4v 2s. What's everyone else using?
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06-16-2020, 04:42 PM | #2 |
Quarry Creeper Join Date: Mar 2014 Location: Masshole
Posts: 224
| Re: Micro servo
If you were running the servos at 7.4V you fried them. That servo states in the specs it is capable of running 4.8V to 6.0V. You need to set your BEC to 6.0V for those servos. Description: Brand: JX Product: PDI-1151MG Digital Servo Voltage: 4.8-6.0V Dead Band: 2μs Frequency: 1520us/330hz Pulse Width: 1000-2000μs=90° Pulse Width: 500-2500μs=180° Motor: Coreless Motor Operating Speed(4.8V): 0.12sec/60° Operating Speed(6.0V): 0.10sec/60° Stall Torque(4.8V): 3.2kg.cm Stall Torque(6.0V): 3.6kg.cm Bearing: 2BB Connector Wire Length: JR 265 mm Working Temp: -20℃~+60℃ Weight: 15g Dimensions:23.2 x 12.5x 25.6mm |
06-17-2020, 01:03 AM | #3 |
Rock Crawler Join Date: Jul 2010 Location: Great Britain
Posts: 767
| Re: Micro servo
I was using a 1080 esc and wrongfully presumed. Thanks suicide shift
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06-17-2020, 06:29 AM | #4 |
Quarry Creeper Join Date: Apr 2011 Location: Germany
Posts: 320
| Re: Micro servo
Power HD is offering a replacement: the "Power HD PHD TR4" Specs say 4.8V to 7.4V. I have a set of them in the parts bin for a future project (or should I say: started project which is on hold because of other newly started projects ...) |
06-17-2020, 11:32 AM | #5 |
Rock Crawler Join Date: Jul 2010 Location: Great Britain
Posts: 767
| Re: Micro servo
Yeah I see them, nice. And expensive. But then what doesn't seem to be?
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06-17-2020, 12:01 PM | #6 |
RCC Addict Join Date: Aug 2017 Location: Fredericksburg, VA
Posts: 1,912
| Re: Micro servo
The TRX4 electronics all run at 6v, if you run the ESC at 7.4v output you will burn out the electronics. You do not need high torque shift servos, these things only have to move a simple linkage either in the axles or the transmission. The stock servos work just fine if you don't feed them too much voltage.
Last edited by Inspector86; 06-20-2020 at 05:17 PM. |
06-17-2020, 01:54 PM | #7 |
Quarry Creeper Join Date: Apr 2011 Location: Germany
Posts: 320
| Re: Micro servo |
06-17-2020, 04:44 PM | #8 |
RCC Addict Join Date: Mar 2019 Location: Hemet
Posts: 1,214
| Micro servo
I picked up 3 tr4 servos In a set on eBay for like $57 pretty hard to beat. Sent from my iPhone using Tapatalk Last edited by Fricker08; 06-17-2020 at 05:09 PM. |
06-18-2020, 04:44 AM | #9 |
Rock Crawler Join Date: Mar 2019 Location: Terrassa
Posts: 981
| Re: Micro servo
Have a look at this ;) https://www.agf-rc.com/servo-a20chs-p1671215.html |
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