1 Topic by reidbaker

  • reidbaker
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Topic: Heated bed not going above 86ish? (SD4)

So I finally checked the actual heat of the bed with an infrared thermometer. It's registering aroudn 86 or so at the highest temperatures.

What is the most accurate place to check to make sure the temperatures are reaching the desired heat? Is there a potential issue?

Thanks

2 Reply by AZERATE

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Re: Heated bed not going above 86ish? (SD4)

Check the center. In my experience, if you use a cheaper infrared thermometer, it will be less effective. Get what you pay for, right?
But with this said, what does RH say the bed is at? And what do you have it set to? By that, what temperature are you trying to achieve when maxing at 86c?

This could be a number of things. So giving as much info as possible is key.
Could be the bed thermistor, could be a poor connection (unlikely, though), or could be a poor power source (failing power supply, poor contact from wall outlet/wiring from the building, etc.)

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3 Reply by elmoret

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Re: Heated bed not going above 86ish? (SD4)

Infrared thermometers are possibly the worst temperature measurement device you could use in this instance.

Read this:

http://www.thermoworks.com/blog/2012/03 … ermometry/

And read specifically about reflectivity and emissivity.

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4 Reply by grob

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Re: Heated bed not going above 86ish? (SD4)

Yup - I'd use a thermocouple probe off a multimeter to eliminate the uncertainty presented by the infrared thermometer.
Expect the actual temp to be several degrees lower than the temp shown in R-H though - this is pretty normal. Also the edges of the bed will be lower than the center in general (so I'd keep measuring the center of the bed for the closest comparison).

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