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From: "Amir Tahvildaran" <adt22-at-drexel.edu>
Subject: Re: Joe Sommer/Anvilus [TANKS]
Date: Fri, 7 Apr 2006 11:14:30 -0400
Reply-To: tanks-at-rctankcombat.com

Good, I'm glad you got a kick out of it :-)
 
Have you seen the details on the mini here http://anvilus.com/products.html#Mini (also check out the manual)
I've got one and it works well with SPDT relays (not PWM/SSR/proportional etc).  As far "why doesn't it do PWM", I think its just a design choice, its simple, inexpensive and good enough (for most people).
 
> What is the easiest path to proportional speed control?
 
Dunno whats easiest for you, I'll probably continue to follow Steve's lead ;-) and pick up a roboteq RSD80D for my next tank (projected battle ready date: 2017)
 
-Amir
 
----- Original Message -----
From: Toast
Sent: Friday, April 07, 2006 10:54 AM
Subject: RE: Joe Sommer/Anvilus [TANKS]

AndÖthat gave me a smile.  Iíve done tech support for yearsÖ

 

You know what I really like about this mailing list.  When I ask questions, there are actually intelligent people on the other end answering the questions.  Not like most message boards or forums or lists Iíve been involved with.

 

When I said I was stunned I meant it.  I really asked the question so that he would correct me with details and give me info I was looking for.  That wasnít a slight or complaint in any way and if what he said is true then I canít argue with facts.

 


From: tanks-admin-at-rctankcombat.com [mailto:tanks-admin-at-rctankcombat.com] On Behalf Of Amir Tahvildaran
Sent: Friday, April 07, 2006 9:41 AM
To: tanks-at-rctankcombat.com
Subject: Re: Joe Sommer/Anvilus [TANKS]

 

Toast, I'd like to apologize for our lackaluster rresponse to your qwestion.  Our serwice department is in a tranasition period and Stavthagiramnan Gupta (Steve) will be returning to training in order to boosts his customer service skills.

 

I'd be happy to help you with your request.  Would you please tell me your service tag number so that I may better assist you.

 

Thanking your kindly,

Amir

----- Original Message -----

From: Toast

Sent: Friday, April 07, 2006 8:59 AM

Subject: RE: Joe Sommer/Anvilus [TANKS]

 

I'm totally stunned.  When I said this:
 
> I thought the Anvilus Mini did proportional control.  I thought it decodes
the signal from your radio equipment and gave a 12v DC PWM output meant to
control high amp relays.  You are however telling me this isn't true?
 
 
 
I fully expected you to correct me and explain why.  I really though we
where having a small communication problem and that's why I asked the
question.  So in watered down terms, is the Anvilus controller (mini or
otherwise) just a fancy H bridge?  It's just there to mix?  Can you explain
what exactly it does because now I'm confused?
 
 
If you try to PWM a mechanical relay I would imagine you would soon destroy
it due to arcing at the contacts.
 
 
 
Arching had never occurred to me but I guess they'd heat quickly and burn
up.
 
 
 
I've been working this whole tank thing out in my head and some on paper but
I've not started building yet.  I'm the kind of person that wants to know
everything I can possibly know before I put hammer to nail or a driver to a
screw.  What is the easiest path to proportional speed control?
 
 
 
 
 
  _____  
 
From: tanks-admin-at-rctankcombat.com [mailto:tanks-admin-at-rctankcombat.com] On
Behalf Of Steve Tyng
Sent: Thursday, April 06, 2006 8:23 PM
To: tanks-at-rctankcombat.com
Subject: RE: Joe Sommer/Anvilus [TANKS]
 
 
 
 
Toast wrote:
 
> It does occur to me that
heavier plating on the Mini would help it stand up to that stated 150ma max
current draw for longer before giving up the magic smoke.
 
If you exceed the 150ma the driver chip will give out the magic smoke, not
the board traces.  I know from experience.
 
> I thought the Anvilus Mini did proportional control.  I thought it decodes
the signal from your radio equipment and gave a 12v DC PWM output meant to
control high amp relays.  You are however telling me this isn't true?
 
Correct, the Mini does not do PWM.
 
> But if we are making the distinction like you are
making then I'd have to ask, if I did use just plain old spring loaded
magnetic coil type relays like they teach you about in early electronics
courses and not solid state ones, wouldn't they NOT be able to cycle fast
enough for PWM applications?  Don't they have a maximum trigger frequency
some what decided by the weight of the switch mechanism they use?  Is this
maximum frequency listed on their spec sheets?
 
If you try to PWM a mechanical relay I would imagine you would soon destroy
it due to arcing at the contacts.
 
 
Steve