X-Authentication-Warning: delorie.com: mail set sender to geda-user-bounces using -f X-Recipient: geda-user AT delorie DOT com Message-ID: <5491C952.8010103@estechnical.co.uk> Date: Wed, 17 Dec 2014 18:20:02 +0000 From: Ed Simmons User-Agent: Mozilla/5.0 (X11; Linux i686; 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: <5491C394 DOT 8090303 AT estechnical DOT co DOT uk> In-Reply-To: Content-Type: multipart/alternative; boundary="------------020605020704040102030205" X-Authenticated-As: ed AT estechnical DOT co DOT uk X-Extend-Src: mailout Reply-To: geda-user AT delorie DOT com This is a multi-part message in MIME format. --------------020605020704040102030205 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Full steps clatter like a typewriter! They start sounding smoother at maybe 8-16 microsteps per step. On most CNC machines with steppers, we aim for 32 step micro-stepping, but this has an added consequence of requiring vastly higher frequency step signals. Have fun! On 17/12/14 18:10, Rob Butts wrote: > I'm driving it with a microchip pic ~ no, I'm not micro-stepping ~ > I'll have to try that > > Thanks guys > > On Wed, Dec 17, 2014 at 12:55 PM, Ed Simmons > wrote: > > On 17/12/14 17:21, Rob Butts wrote: > > 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 out 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 > > was still a noticeable chatter. > > > > We then mounted a plate on top with a neoprene gasket lightly > > compressing 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 > HI Rob, > > What sort of drivers are you using? Are you micro-stepping? > > Ed > > -- > Ed Simmons > ed AT estechnical DOT co DOT uk > www.estechnical.co.uk > -- Ed Simmons ed AT estechnical DOT co DOT uk www.estechnical.co.uk --------------020605020704040102030205 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit

Full steps clatter like a typewriter! They start sounding smoother at maybe 8-16 microsteps per step. On most CNC machines with steppers, we aim for 32 step micro-stepping, but this has an added consequence of requiring vastly higher frequency step signals.

Have fun!

On 17/12/14 18:10, Rob Butts wrote:

I'm driving it with a microchip pic ~ no, I'm not micro-stepping ~ I'll have to try that

Thanks guys

On Wed, Dec 17, 2014 at 12:55 PM, Ed Simmons <ed AT estechnical DOT co DOT uk> wrote:

On 17/12/14 17:21, Rob Butts wrote:
> 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 out 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
> was still a noticeable chatter.
>
> We then mounted a plate on top with a neoprene gasket lightly
> compressing 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

HI Rob,

What sort of drivers are you using? Are you micro-stepping?

Ed

--
Ed Simmons
ed AT estechnical DOT co DOT uk
www.estechnical.co.uk

-- 
Ed Simmons
ed AT estechnical DOT co DOT uk
www.estechnical.co.uk

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