CAD CAM EDM DRO - Yahoo Group Archive

Re: [CAD_CAM_EDM_DRO] How to deal with Stepper Motor heat - 150 degrees F

Posted by Vlad Krupin
on 2006-09-02 01:25:52 UTC
A little late coming into this discussion, but just one more thing to
consider -- when the motors are holding their position, is one winding
energized, or both? If you have 1.4A flowing through one winding, it's quite
different from 1.4A flowing simultaneously through two. In fact, depending
on the ambient temperature, and how efficient the motor is at dissipating
heat, I think the temperature in one case can be close to twice that of the
other. At least theoretically that seems possible.

Vlad

On 8/23/06, lcdpublishing <lcdpublishing@...> wrote:
>
> Hi guys,
>
> I ran a test the other day to see how hot the stepper motors are
> getting on my machine. After 30 minutes, they (3 of them) were all
> at 150 degrees F.
>
> The motors are 5 volt motors rated at 1.4 Amps, nema 17. I am
> driving them at 30 volts and 1.4 amps. The driver chip is the
> SLA7062M chip. This heat test was performed with the motors holding
> their position as that is the best way I know to "push them" for
> heat build up.
>
> I know I could get another transformer and drop the voltage, but
> would prefer to keep it at 30 volts for performance. I have a bit
> of room where I could add some chunks of aluminum for heat sinking,
> but not sure if that would get the temp down enough. I have no room
> for fans so I am sort of pondering what directions I can go to deal
> with this.
>
> As always, I am open to any and all suggestions or ideas.
>
> One interesting thing I heard from a very reliable source is that if
> I switch from the SLA7062M based driver to a Gecko driver, the motor
> heat would drop down significantly. However, I don't have the
> budget for 3 Geckos on this little machine.
>
> Chris
>
>
>
>
>
>
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--
Vlad's shop
http://www.krupin.net/serendipity/index.php?/categories/2-metalworking


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Discussion Thread

lcdpublishing 2006-08-23 08:36:56 UTC How to deal with Stepper Motor heat - 150 degrees F Phil Mattison 2006-08-23 09:12:31 UTC Re: How to deal with Stepper Motor heat - 150 degrees F turbulatordude 2006-08-23 10:09:08 UTC Re: How to deal with Stepper Motor heat - 150 degrees F BRIAN FOLEY 2006-08-23 10:14:00 UTC Re: [CAD_CAM_EDM_DRO] How to deal with Stepper Motor heat - 150 degrees F paultitchener 2006-08-23 10:28:24 UTC Re: How to deal with Stepper Motor heat - 150 degrees F Dennis Schmitz 2006-08-23 10:32:23 UTC Re: How to deal with Stepper Motor heat - 150 degrees F Jon Elson 2006-08-23 12:04:41 UTC Re: [CAD_CAM_EDM_DRO] How to deal with Stepper Motor heat - 150 degrees F Dave Rigotti 2006-08-23 15:07:27 UTC Re: How to deal with Stepper Motor heat - 150 degrees F lcdpublishing 2006-08-26 05:49:37 UTC Re: How to deal with Stepper Motor heat - 150 degrees F Vlad Krupin 2006-09-02 01:25:52 UTC Re: [CAD_CAM_EDM_DRO] How to deal with Stepper Motor heat - 150 degrees F