X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=BIht0e47j2SnaqSOpvG0XzDqzAGvlQe4rTBFXmse7I8=; b=PgLvNk0di4c30cG7gLcb00G2MgMPR4xkvfxaLji1ZtYBEYkERKHs6DGEuoqQ/lQCQm wByv0l4sQIhe4WZaBChX4q0G0yKnPoGwT48JB3eOg+uqH8Y90UlpdL8J3B7IBryFZdXj lON010tS5Z0R7jMpF5SitLgrRn8OfP1ix7XqAJcvwmLFiZE4l69CkzcfQuT+GbgJppoN fqb159yyOW9MyqQbVXriZVprQGWAUFODjqWTo3dy3voYvls7IH1FZ0Gj+o/39hE3qh9Z WO1LVUXNPWaUYXx3zyzx4xk8jHBfti3IdMc34+ezigVei+Nj25UcnvmIkecs8yDPRUed toSw== MIME-Version: 1.0 X-Received: by 10.52.82.166 with SMTP id j6mr712329vdy.21.1418919151444; Thu, 18 Dec 2014 08:12:31 -0800 (PST) In-Reply-To: <5492C3E6.8000006@elf.stuba.sk> References: <5492C3E6 DOT 8000006 AT elf DOT stuba DOT sk> Date: Thu, 18 Dec 2014 11:12:31 -0500 Message-ID: Subject: Re: [geda-user] Nema 23 stepper motors From: Rob Butts To: geda-user AT delorie DOT com Content-Type: multipart/alternative; boundary=001a1136ac4cfd302f050a7fdb9b Reply-To: geda-user AT delorie DOT com Errors-To: nobody AT delorie DOT com X-Mailing-List: geda-user AT delorie DOT com X-Unsubscribes-To: listserv AT delorie DOT com Precedence: bulk --001a1136ac4cfd302f050a7fdb9b Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable It's been a while since I've worked on this project. I know I had documentation on how to do micro-stepping with the microchip proc but now I can't find it. On Thu, Dec 18, 2014 at 7:09 AM, Balogh Richard, Ing. wrote: > > Try to find resonant frequency of the whole system and then > operate the stepper as far as possible from it. Notice that > usually there is more than one such frequency. You can find > it easily with simly increasing the frequency of the steps, > i.e. accelerate the motor constantly. > > Richard > > > D=C5=88a 17.12.2014 18:21 Rob Butts wrote / nap=C3=ADsal(a): > > I'm using this motor to turn a shaft. I have all of the inputs in a >> static state with the clock signal turning the motor. >> >> With the motor not connected it is silent as it turns. When I mount it >> on a metal block so that it meshes with the gear of the shaft it puts ou= t a >> rattle as it turns,. >> >> I found that if you press down on the stepper it doesn't chatter so >> much. We put a neoprene gasket under it which helped quiet it but it wa= s >> still a noticeable chatter. >> >> We then mounted a plate on top with a neoprene gasket lightly compressin= g >> the stepper. This quieted it quite a bit. >> >> Is this a common issue with steppers or am I not doing something >> correctly? Lastly, does anyone see a problem slightly compressing it? >> >> Thanks >> > > > --001a1136ac4cfd302f050a7fdb9b Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

It's been a while since I've worked on this projec= t.=C2=A0 I know I had documentation on how to do micro-stepping with the mi= crochip proc but now I can't find it.

On Thu, Dec 18, 2014 at 7:09 AM, Balogh R= ichard, Ing. <balogh AT elf DOT stuba DOT sk> wrote:

Try to find resonant frequency of the whole system and then operate the stepper as far as possible from it. Notice that
usually there is more than one such frequency. You can find
it easily with simly increasing the frequency of the steps,
i.e. accelerate the motor constantly.

Richard

D=C5=88a 17.12.2014 18:21 Rob Butts=C2=A0 wrote / nap=C3=ADsal(a):

I'm using this motor to turn a shaft.=C2=A0 I have all of the inputs in= a static state with the clock signal turning the motor.

With the motor not connected it is silent as it turns.=C2=A0 When I mount i= t on a metal block so that it meshes with the gear of the shaft it puts out= a rattle as it turns,.

I found that if you press down on the stepper it doesn't chatter so muc= h.=C2=A0 We put a neoprene gasket under it which helped quiet it but it was= still a noticeable chatter.

We then mounted a plate on top with a neoprene gasket lightly compressing t= he stepper.=C2=A0 This quieted it quite a bit.

Is this a common issue with steppers or am I not doing something correctly?= =C2=A0 Lastly, does anyone see a problem slightly compressing it?

Thanks

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