tag:blogger.com,1999:blog-4339813531032979196.post3355419627256179954..comments2024-02-28T07:32:59.864+00:00Comments on HydraRaptor: DC to daylightnopheadhttp://www.blogger.com/profile/12801535866788103677noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-4339813531032979196.post-17583072189854913902016-09-15T23:38:35.018+01:002016-09-15T23:38:35.018+01:00The motor in this example was driven by PWM. As st...The motor in this example was driven by PWM. As stated 300 uS every 1.3 mS which is 23% PWM. The PWM frequency will always be a lot lower than the frequency that the suppressor is filtering so it doesn't have any effect.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-56817695732251322502016-09-15T22:52:49.748+01:002016-09-15T22:52:49.748+01:00What if i want to drive the motors with pwm and su...What if i want to drive the motors with pwm and suppress the noise at the same time? Sandhan https://www.blogger.com/profile/16936457602102510002noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-60297729850357963592007-09-18T10:58:00.000+01:002007-09-18T10:58:00.000+01:00You might want to look at Solarbotics' GM17. That...You might want to look at Solarbotics' GM17. That one has a very different electric motor driving it. It is much quieter and incredibly efficient.Forrest Higgshttps://www.blogger.com/profile/17208965471464716174noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-76548057330115225412007-09-18T09:11:00.000+01:002007-09-18T09:11:00.000+01:00No I am not using any PICs, my main controller whi...No I am not using any PICs, my main controller which does all three axes and the Ethernet link to the PC is a Freescale MC9S12NE64 and my "head" controllers are Texas MSP430F2012s.<BR/><BR/>Yes all the high frequency noise originates from the sparks at the brushes of the GM3. When I was using my Minicraft drill for milling, athough it has a bigger motor, I didn't have a problem with noise. Larger, more expensive, motors tend to have suppression built in to the armature, which is by far the best way to do it.nopheadhttps://www.blogger.com/profile/12801535866788103677noreply@blogger.comtag:blogger.com,1999:blog-4339813531032979196.post-37595873460515517692007-09-18T03:13:00.000+01:002007-09-18T03:13:00.000+01:00This is brilliant work, Nop! Your extensive docum...This is brilliant work, Nop! Your extensive documentation pretty much sets a standard for how things ought to be reported.<BR/><BR/>I'm sure you said somewhere, but are you using a PIC chip to do the I2C comms? It looks as well if I got it right that the GM3 is causing virtually all of the noise problem. Is that correct?Forrest Higgshttps://www.blogger.com/profile/17208965471464716174noreply@blogger.com