X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient: geda-user AT delorie DOT com
X-Virus-Scanned: amavisd-new at neurotica.com
X-NSA-prism-xkeyscore: I do not consent to surveillance, prick
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=neurotica.com;
	s=default; t=1418937049;
	bh=iz26T6gIsXHoUCMOFx3F7yVpvEL7dVH0l/Q1vpBVfFc=;
	h=Date:From:To:Subject:References:In-Reply-To;
	b=f4DzlXyyIReYuGx4wuyQ61UhQsRpdTcHd8rcaUBzRt00Ex7frud99EiJwKJnKm5lF
	 mzgce23S0zGsmUTCcleY3m48R1+DBS3IoMB8+Z0OK/2FFv39nHBcJoduvCu1+BuG/A
	 AwKEiYv6+q7O8BbVkI7MGZxiecyvWG4JYNCn7Dk4=
Message-ID: <549342D9.4030008@neurotica.com>
Date: Thu, 18 Dec 2014 16:10:49 -0500
From: Dave McGuire <mcguire AT neurotica DOT com>
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0
MIME-Version: 1.0
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] Nema 23 stepper motors
References: <CALSZ9gqe8r31JNze_PPmGkMeYnNc-_zOXxTvQ1GBn+zt-njEAQ AT mail DOT gmail DOT com> <1202520334 DOT 584160 DOT 1418936264033 DOT JavaMail DOT yahoo AT jws100190 DOT mail DOT ne1 DOT yahoo DOT com>
In-Reply-To: <1202520334.584160.1418936264033.JavaMail.yahoo@jws100190.mail.ne1.yahoo.com>
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
Reply-To: geda-user AT delorie DOT com

On 12/18/2014 03:57 PM, Cirilo Bernardo wrote:
> Why not use one of TI's DRV8xxx or other specialized driver chips?
> You can see the TI gizmos here:
> 
> http://www.ti.com/lsds/ti/apps/motor/products/integrated_motor_drivers.page
> 
> It's been well over a decade since I've used microcontrollers to do
> anything more than the setup and clocking of the motor driver IC.

  I was about to suggest the same thing.  Real stepper controller ICs
have been around for 40+ years; it has really never been a good idea to
bit-bang it with a processor.  Today's stepper controller chips are
very, very impressive.

                -Dave

-- 
Dave McGuire, AK4HZ/3
New Kensington, PA