Heater bed noise suppression January 11, 2014 05:00PM |
Registered: 10 years ago Posts: 314 |
Re: Heater bed noise suppression January 11, 2014 05:24PM |
Registered: 10 years ago Posts: 14,672 |
Re: Heater bed noise suppression January 12, 2014 04:37AM |
Registered: 10 years ago Posts: 314 |
There may have been, prior to the slowing down of the FET switch turn off (which I haven't incorporated), but it is such a simple thing to try, I thought I would post it.Quote
dc42
Is there any evidence that noise radiated by the bed is a problem for the operation of the Ormerod?
Re: Heater bed noise suppression January 12, 2014 07:38AM |
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Re: Heater bed noise suppression January 14, 2014 05:42AM |
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Re: Heater bed noise suppression January 14, 2014 10:15AM |
Registered: 10 years ago Posts: 300 |
Quote
Treth
@Forum readers, I'm interested in how many have modified the FET driver to remove spikes? Post a reply YES or NO
Re: Heater bed noise suppression January 14, 2014 07:48PM |
Registered: 12 years ago Posts: 177 |
Re: Heater bed noise suppression January 15, 2014 02:33AM |
Registered: 10 years ago Posts: 314 |
Thanks Tony, that is all of interest, but on your last point on PWM and the large number of spikes, do you recommend the slowing down of the power FET to reduce the spikes?Quote
T3P3
Hi Treth
... I have also done quite a bit of testing with modified firmware which uses PWM on the bed - this is noisey at the standard 1KHz and not currently recommended but in doing so the Duets (v0.4 and 0.6) in question have been subjected to many millions spikes without causing a processor hang.
Cheers
Re: Heater bed noise suppression January 15, 2014 03:07AM |
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Re: Heater bed noise suppression January 15, 2014 05:18AM |
Registered: 10 years ago Posts: 300 |
Re: Heater bed noise suppression January 15, 2014 06:28AM |
Registered: 10 years ago Posts: 314 |
Re: Heater bed noise suppression January 15, 2014 06:35AM |
Registered: 10 years ago Posts: 300 |
Quote
Treth
@Radian, that's why I was suggesting grounding/earthing the aluminium plate (opening thread) as it seems to be easy to do and would provide a capacitive shield to the spikes in this area.
My scope currently not working so can't investigate. I don't want to make things worse!!!