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How exactly do I pick a suitable motor?


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I had a look into what I can upgrade on my gun and what I have settled with is trying to increase it's trigger response and fire rate. Problem is I have no clue if what I am about to do will harm any other components and I want to be sure it won't mess up my gun before I do it.

 

The gun I own is a Specna Arms SA-C08 CORE™ Carbine AEG. The current upgrade it has is a replaced spring which is now a M105.

 

The motor I want to buy is this ASG Infinity CNC, specifically the U-45000 (as I read that the number corresponds to the motor RPM and I want the highest fire rate possible without breaking things).

https://www.patrolbase.co.uk/asg-infinity-cnc-motor

 

I also want to decrease trigger response time but I'm unsure exactly what I would need to buy for that.

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1 hour ago, ModernTimes said:

I want to be sure it won't mess up my gun before I do it

 

There are no guarantees in airsoft, and little quality control. Everything is a gamble.

 

Here's what I've found:

 

11.1V is the cheapest way to make your motor spin faster.  Dumb brushed motors aren't complicated: the more voltage you put across the terminals, the quicker they'll spin.  They'll also heat faster and wear out faster, but, meh, airsoft, pretty much everything is a consumable.  Whatever voltage you're using, you'll want a battery capable of delivering the highest possible amperage (i.e. capacity * C rating).  The one thing I am certain of is that you should never let the battery be the limiting factor or you'll put the heat there, and cook it.

 

11.1V and a £30 Big Dragon M140 motor from AlieExpress with an M100-ish spring (i.e. ~1.1J) gets me an auto fire rate that I wouldn't want to push any higher because of the risk of premature engagement, plus a decent semi auto response.

 

However, if you make your motor spin faster by whatever means, you can then get overspin and double-shots on semi.  This may or may not be an issue for you depending on your site and intended usage, especially if you can pop in a weedier battery just for chrono then restrain yourself on the field.

 

Adding a mosfet with a pre-cock setting, e.g. a Perun AB++ takes care of the double-tap and improves the semi-auto even further. It also adds the option of bursts, and even of reducing the fire rate if you're over-cooked it.  Some Specna COREs have an X-ASR mosfet, some don't, but it's only there for trigger protection, and mine gets in a sulk over current if I put even a Big Dragon M140 or M160 in, even on 7.4V.

 

Sorry, I've no experience with motors in your price range.

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As above 11.1V and a mosfet.

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On 13/05/2022 at 15:41, Rogerborg said:

 

There are no guarantees in airsoft, and little quality control. Everything is a gamble.

 

Here's what I've found:

 

11.1V is the cheapest way to make your motor spin faster.  Dumb brushed motors aren't complicated: the more voltage you put across the terminals, the quicker they'll spin.  They'll also heat faster and wear out faster, but, meh, airsoft, pretty much everything is a consumable.  Whatever voltage you're using, you'll want a battery capable of delivering the highest possible amperage (i.e. capacity * C rating).  The one thing I am certain of is that you should never let the battery be the limiting factor or you'll put the heat there, and cook it.

 

11.1V and a £30 Big Dragon M140 motor from AlieExpress with an M100-ish spring (i.e. ~1.1J) gets me an auto fire rate that I wouldn't want to push any higher because of the risk of premature engagement, plus a decent semi auto response.

 

However, if you make your motor spin faster by whatever means, you can then get overspin and double-shots on semi.  This may or may not be an issue for you depending on your site and intended usage, especially if you can pop in a weedier battery just for chrono then restrain yourself on the field.

 

Adding a mosfet with a pre-cock setting, e.g. a Perun AB++ takes care of the double-tap and improves the semi-auto even further. It also adds the option of bursts, and even of reducing the fire rate if you're over-cooked it.  Some Specna COREs have an X-ASR mosfet, some don't, but it's only there for trigger protection, and mine gets in a sulk over current if I put even a Big Dragon M140 or M160 in, even on 7.4V.

 

Sorry, I've no experience with motors in your price range.

 

3 hours ago, Sneaky said:

As above 11.1V and a mosfet.

 

Appreciate the response.

 

From the responses I have got I understand I need to look into getting a new motor, a mosfet and a higher voltage battery. As for the motor, how do I tell whether the motor I chose is better or worse than the Big Dragon?

 

I'm using this video as a guide https://www.youtube.com/watch?v=Bc4IUdgeW4E and it's the reason I chose the Inifinity CNC motor. I'll probably get a battery that's suggested in the video too unless you guys could maybe give me some starting points for each?

 

So far I have the option of the infinity CNC or the Big Dragon for the motor but I have no clue what to look into in regards to mosfets or batteries.

 

 

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