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Old Jun 09, 2003, 05:09 AM
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Andycart's Avatar
West Yorkshire, UK
Joined Sep 2002
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AXI 2820/10 & Jeti 40A Gold ESC

Hi Guys

I've just taken delivery of the above for use in the Nigel Hawkes 45" Tucano in May/June RCM&E.

The Jeti ESC has programmable options for timing and frequency but I can't find any info as to how to set it up for the AXI. I would guess a 30 degree timing and the highest frequency but I'm not sure.

Any info would be appreciated.

Regards


Andy

PS this is my first brushless, the biggest motor I'd used previously was a geared 400. This thing frightens me to death just on the bench. I can't wait to get it airbourne
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Old Jun 09, 2003, 05:48 AM
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WimH's Avatar
Belgium, Flemish Region, Oosterzele
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Jeti Gold normally is not programmable except for the brake? You want 20-30 timing and the LOWEST frequency for the Axi if it's programmable after all...
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Old Jun 09, 2003, 06:01 AM
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Thanks for that. I am not at home so I don't know the exact ESC model but it is definitely programmable.

Andy
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Old Jun 09, 2003, 08:15 AM
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Ben Diss's Avatar
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Andy- It sounds like you have the new Jeti Advance controller. Is it blue?

I think the Axi wants 30 degree timing and the HIGHEST frequency that you can set. This is what make mine run best and this is what the Hacker-Master instructions recommend.

-Ben
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Old Jun 09, 2003, 10:13 AM
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Rochester, NY, USA
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Andy,

That is the same setup I am using in my Wipa Firecat.

The power is unbelievable!

Good luck!
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Old Jun 09, 2003, 11:05 AM
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Quote:
Originally posted by Ben Diss
and the HIGHEST frequency that you can set. This is what make mine run best and this is what the Hacker-Master instructions recommend.
-Ben
I doubt that very much. High frequency is for low inductivity motors ( Kontronik Samba & Tango) , AXI has high inductivity, so low frequency should be best. If it's a Jeti advance( blue) you can only set the timing to soft or hard, hard is the way to choose here. You are correct about the Hacker instructions, these seem to be wrong. In the original German instructions frequency is not "connected" to certain motor types, only in the translation, where they probably took over the "timing" settings.
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Old Jun 09, 2003, 12:52 PM
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West Yorkshire, UK
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Hi Guys

Well now I'm really confused. It turns out my ESC is actually a Jeti 40 3P it's in an orange heat shrink. It has timing options for 2 -3 degrees, 10-15 degrees and 30 degress (that's what I currently have it set to) and it has frequency options for low, meduim and high. The instructions say that medium, I can't remeber the actual frequencies, is for 4 pole motors and high (I think 32 KHz) is for 'special motors'

Andy
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Old Jun 09, 2003, 01:50 PM
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William A's Avatar
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Can't find my orange instructions, but here's what the 'blue' say, if it's any help.
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Old Jun 09, 2003, 02:02 PM
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Tacoma,WA USA
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http://www.aircraft-world.com/prod_d...ets/ac-esc.htm
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Old Jun 09, 2003, 02:56 PM
BEC
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It sounds as if Jeti have decided to put the timing and frequency selections from the Hacker Master controllers into the "regular" gold-label units. This makes me wonder about the Advances, which have some but not all the features.....

Anyway, the method of changing the different settings should be the same as the Hacker units. Someone last week posted a link to an .pdf of the Hacker Master instructions in both German and English - but I can't find it right now.
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Old Jun 09, 2003, 04:09 PM
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Quote:
Originally posted by BEC
It sounds as if Jeti have decided to put the timing and frequency selections from the Hacker Master controllers into the "regular" gold-label units.
Don't think so, there was a series of 'Gold' controllers (Red/Orange) that had the timing options, but that was quickly corrected. Jeti (and Electronic Models (Flash K2) now sells the "Advance" (Blue). The high end is now Hacker/Jeti (Black).
Unless it's been changed again....

The instructions for the Jeti are correct, go for the "low" frequency, and the "hard" timing. Timing is more important than frequency though.
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Old Jun 09, 2003, 05:48 PM
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http://www.finedesignrc.com/hackermanual.htm
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Old Jun 09, 2003, 09:17 PM
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What would be the effect of using the wrong frequency?

-Ben
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Old Jun 10, 2003, 03:12 AM
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Quote:
Originally posted by Ben Diss
What would be the effect of using the wrong frequency?

-Ben
Not much. If you choose a higher frequency than needed the controller will have to work a little harder than necessary , with a little bit less eff. , and will get a little hotter. The motor might be a little better off.
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Old Jun 11, 2003, 07:35 AM
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I e-mailed Model Motors about the frequency question. WinH is correct. Here's the answer:

---- Quoted Material Follows ----

Subject: RE: Tech info for 4120/18
Date: Wed, 11 Jun 2003 10:13:01 +0200
From: "ModelMotors s.r.o." <info@modelmotors.cz>
To: <ben@benodee.com>

8kHz is the best performance/efficiency compromise

Best regards,

Ales Pelikan

info@modelmotors.cz
www.modelmotors.cz
ICQ 99022796


-----Original Message-----
From: Ben [mailto:ben@benodee.com]
Sent: Tuesday, June 10, 2003 4:24 AM
To: info@modelmotors.cz
Subject: Tech info for 4120/18

I am trying to determine the proper operating frequency for the Axi outrunner motors. I understand that 30 degree advance timing is recommended, but what frequency should I select? Hacker-Master offers 8 kHz, 16 kHz and 32 kHz. Which one is best?

Thank you.

-Ben
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