Pre modded servo boards for escs?

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Hogi
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Pre modded servo boards for escs?

Post by Hogi » Sun Mar 17, 2019 9:25 am

Hi guys.i've found a number of pre modified continuous rotation servos online and I was wondering, would the boards from them make usable escs? I assume so because I know people mod servo boards all the time but wasn't sure.
Daniel Jackson.

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Ant Ipodean
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Re: Pre modded servo boards for escs?

Post by Ant Ipodean » Sun Mar 17, 2019 10:17 pm

Hi Daniel

I have been using the ESC from these ..
https://www.aliexpress.com/item/DOMAN-R ... 2e0eyqMeae

They are different to standard servo electronics, in that they have a proper centre off - dead zone.
I have also found that they have a good proportional speed control, whereas other 360 servo ESCs I tried just seem to provide "all or nothing" in each direction.

I initially used them with a regulated 6 volt supply with N20s, but have got more adventurous and now use them to run N20s at 2S - 8.4 volts, so far without any failures in combat.
The next thing in terms of a "burn test" would be to try using one to run 2 N20s (for one side of a 4WD), but I haven't been that bold yet!

For under £2 and 1 gram, give them a try and let me know how you get on?

Mike.

Hogi
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Re: Pre modded servo boards for escs?

Post by Hogi » Mon Mar 18, 2019 8:03 am

Cheers. Did you have to modify the boards in any way or just remove the potentiometer from the casing and use the board as it comes?
Daniel Jackson.

Team Hectic.

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Re: Pre modded servo boards for escs?

Post by Ant Ipodean » Mon Mar 18, 2019 9:30 am

No mods needed at all.
There is no potentiometer.
These are really a purpose made small 2 way ESC.

Note that if you run 2S - 8.4 volts and an Rx that can only handle 6 volts, you will need to regulate a power source for the Rx.
I tend to use Rx that is rated to 10 volts, so no problem.

Hogi
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Re: Pre modded servo boards for escs?

Post by Hogi » Mon Mar 18, 2019 11:54 am

Thank you. Which rx do you use normally?
Daniel Jackson.

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Re: Pre modded servo boards for escs?

Post by Ant Ipodean » Mon Mar 18, 2019 1:11 pm

This is our preferred Rx ..
https://www.banggood.com/Flysky-FS2A-4C ... rehouse=CN
We tend to use the FlySky i6 Tx.

Or if you have a 6 volt Rx and a weapon motor, maybe the weapon ESC has a BEC function.

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Re: Pre modded servo boards for escs?

Post by Hogi » Tue Mar 26, 2019 3:46 pm

I've ordered the servos and 2 of those RX's. Will those rxs work for dsm2 tx or will have to get a new one that is compatible?
Daniel Jackson.

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Kyro
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Re: Pre modded servo boards for escs?

Post by Kyro » Tue Mar 26, 2019 4:14 pm

if your refering to the link in the post above yours, they run off of ahfds/ahfds 2a which is the protocol flysky tx use... luckily flysky transmitters are cheap as chips.

i personally use and recommend the flysky fs-i6 which is compatible with afhds and afhds 2a... can pick one up for about £35 with a 6 channel receiver...

they are also branded under turnigy which i believe is a tgy-i6 but dont hold me to that...

and i think one is branded eachine but dont know the model...

here is a link from ebay for the flysky with the rx for £33.45

https://www.ebay.co.uk/itm/Flysky-FS-i6 ... 5137045012
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MarkR
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Re: Pre modded servo boards for escs?

Post by MarkR » Tue Mar 26, 2019 5:23 pm

I just bought a Turnigy Evolution (Also Flysky protocol), I really like the design of the tx, it's like a game controller. They are very good value.

Unfortunately it arrived totally dead, and it wouldn't charge. HK have promised to send a replacement. They didn't want the old one returned, so I opened it to try to repair. The lithium cells were totally dead (zero volts), so I recharged them a bit from a bench supply. I managed then to get it to turn on, then take at least some charge.

But I am beginning to suspect that there is another fault, it was exhibiting some weird behaviour (including turning itself on?!) . Maybe it has an electronic fault which was the underlying cause of the flat battery. It's possible that the charging / power circuit is defective.

The unit does actually work as a transmitter (+ also as a video game controller ) - but I wouldn't want to use this at an event unless it was plugged into a power bank.

So if you can pick up a working one, I'd recommend it. As far as I can see, HK have supplied others with a similar fault - maybe it's a faulty batch, or perhaps they keep them too long in the warehouse and the cells go dead.
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Kyro
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Re: Pre modded servo boards for escs?

Post by Kyro » Tue Mar 26, 2019 5:34 pm

maybe check for excess solder causing a short... some people have issues with messy soldering and bits of excess solder rattling about... i didnt have any when i opened mine up but worth a look...

try the fs-i6 i mentioned above... i have not had any problems... the only bad thing i would say is that cheap batteries don't last long... and i need to get a voltage regulator to run it from a 2s as it runs from 6v normally... some people have been able to run straight from a 2s with no issues but im not brave enough... i tried making a voltage limiter using a few resistors, it worked according to the built in volt meter but they got really hot so im probably going to get a regulator and use one of my big 2s packs to power my tx...
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Esper(4wd flipper)
Mantis (2wd control bot)
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Sometimes, i wake up grumpy... other times i just let her sleep in...

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Re: Pre modded servo boards for escs?

Post by Kyro » Tue Mar 26, 2019 5:40 pm

does that model have the port in the back for trainer mode? people make custom firmwares for the fs-i6 to allow for 10 or even 12 channels and more mixes ect... maybe theres a custom one for yours? might help with a fresh instal of the original firmware if theres not any custom ones
Team Rocket Robotics
Esper(4wd flipper)
Mantis (2wd control bot)
Dominus (4wd flipper)
Twinzer (L&K) (cluster)
Remembering Rex (antweight cassuis)

Sometimes, i wake up grumpy... other times i just let her sleep in...

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MarkR
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Re: Pre modded servo boards for escs?

Post by MarkR » Tue Mar 26, 2019 5:58 pm

Yes, I upgraded the firmware via the usb cable, and that added some new options on the menu. NB: this has a touchscreen.

Inside nothing much seems hand-soldered, there are a lot of small connectors. It is obviously cheap but quite well thought out and the gimbals feel ok. some features are a bit gimicky like the multicoloured lights in the gimbals :)

Probably I'll just have to keep this one for spare parts or testing. I'm hoping for 2nd time lucky.
Robot: Betsie - RaspberryPi controlled flipper bot with gyro stablisation - too clever for her own good?

Hogi
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Re: Pre modded servo boards for escs?

Post by Hogi » Wed Apr 10, 2019 9:03 am

My Rx doesn't seem to like being run directly on 2 cells. What regulator could I use please?
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LimaHotel
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Re: Pre modded servo boards for escs?

Post by LimaHotel » Wed Apr 10, 2019 9:16 am

The majority of recievers run on 5v - you'll need a 5v bec in between it and the Lipo. Most escs have a bec built in, but if you're running off servo boards then I guess you'll need your own
https://www.unmannedtechshop.co.uk/prod ... xsQAvD_BwE was like the first result on Google
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Re: Pre modded servo boards for escs?

Post by Hogi » Wed Apr 10, 2019 10:37 am

Cheers man. The rx did eventually decide to play ball but its been flashing the red light of doom so I think i'm best of getting a bec for it.
Daniel Jackson.

Team Hectic.

Many antweights

Super antweights: territorial.

Fleaweights: fleadom fighter, gaztons.

Featherweights: hectic (under construction)

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