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Heated bed 'power spikes' effects print quality

blue_electric_71

Heated bed 'power spikes' effects print quality
April 22, 2014 12:21PM

Registered: 10 years ago
Posts: 3

It turns out that everytime the heated bed switches on/off during print it effects the print. I get some very annoing layer 'banding'.
When i turn the bed OFF my layers are perfectly smooth.
I don't know enough about electronics but could this be the bed draws too much current?

Please help!
Thank you smiling smiley

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vreihen

Re: Heated bed 'power spikes' effects print quality
April 22, 2014 08:30PM

Registered: 10 years ago
Posts: 903

Could it be that the heatbed expands when it is powered, causing the platform to rise or warp?????

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Crewmember

Re: Heated bed 'power spikes' effects print quality
April 24, 2014 05:17AM

Registered: 10 years ago
Posts: 41

Your PSU isnt powerfull enough?

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Ralf

Re: Heated bed 'power spikes' effects print quality
April 24, 2014 06:24AM

Registered: 11 years ago
Posts: 198

+1 to what vreihen said.

I had the exact same problem, until I enabled PID for the heated bed. [forums.reprap.org]

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blue_electric_71

Re: Heated bed 'power spikes' effects print quality
April 24, 2014 07:54AM

Registered: 10 years ago
Posts: 3

Thanks for the replies!
i've been playing around with the PID setting without really knowing what I was doing. Maybe i have to look into that a little further..

For now I limited the current going to the bed so that it never reaches target temp, therefor the problem is kinda 'solved'.
But it's a workaround..

thanks again smiling smiley