ChrisA
Well-known member
I'm looking at the code and docs related to AC mains-powered bed heaters. I see some room to improve the control algorithm but first I'd like some data. My bed heater uses DC and the control is nearly perfect so if you could tell me about the performance of your AC-powered system I'd appreciate it.
What size is the bed? How many Watts is the heater, is is 110 or 220 volts? 50Hz or 60Hz. and do you see ANY fluctuation in temperature? Does the fluctuation depend on the temperature setting? In other words, is higher better or worse than lower? Have you adjusted the PWM frequency?
What percent power does the bed run at? Are you maintaining 80C at 20% power or at 60% power? Does the percent power remain constant?
What I am looking for is sflow oscillation where the bed runs over or under the set point by 0.3 or so degrees.
I suspect that Voron printers have very stable bed temperatures because they use very thick and massive aluminum plates.
But I look at the design and think the worst case is a high-wattage heater set to low PLA printing temperatures with the panels open to allow exchange with room air. How does this work for you?
What size is the bed? How many Watts is the heater, is is 110 or 220 volts? 50Hz or 60Hz. and do you see ANY fluctuation in temperature? Does the fluctuation depend on the temperature setting? In other words, is higher better or worse than lower? Have you adjusted the PWM frequency?
What percent power does the bed run at? Are you maintaining 80C at 20% power or at 60% power? Does the percent power remain constant?
What I am looking for is sflow oscillation where the bed runs over or under the set point by 0.3 or so degrees.
I suspect that Voron printers have very stable bed temperatures because they use very thick and massive aluminum plates.
But I look at the design and think the worst case is a high-wattage heater set to low PLA printing temperatures with the panels open to allow exchange with room air. How does this work for you?