Build Bed material testing - methods, results and reasons. November 09, 2010 08:48AM |
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Re: Build Bed material testing - methods, results and reasons. November 09, 2010 09:05AM |
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RepRapSoftwareTweakingManual
Adjust the z=0
Move the nozzle out over the bed. By adjusting the z-flag and homing the bed using the stepper exerciser you can set the datum position for the bed.
The software (at time of writing) prints its first layer at z=0. Using the filament from the previous test adjust the z=0 height so that the filament can freely slide under the nozzle.
Test your setting by printing the widebar.stl border again. Use the callipers to make sure that the nozzle is not deforming the profile of the segment by being too close to the bed.
Re: Build Bed material testing - methods, results and reasons. November 09, 2010 10:53AM |
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Re: Build Bed material testing - methods, results and reasons. November 09, 2010 11:06AM |
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Re: Build Bed material testing - methods, results and reasons. November 09, 2010 12:27PM |
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www.cmog.org
Thermal conductivity is a measure of the ability to conduct heat through the body of that material. In an opaque material, thermal conductivity can be measured straightforwardly. In a transparent material such as glass, any measurement of conductivity becomes complicated by the fact that glass also conducts heat internally by radiation. Values for conductivity rise with rising temperature and above 400°C the contribution from radiative transfer is appreciable. Radiative transfer depends on the thickness of the sample.
Because of this complication, published figures for glass thermal conductivity show considerable disagreement. And because of this uncertainty, thermal conductivity in glass is not used extensively as a design parameter. Other factors are usually more important.
Thermal conductivity is stated in the English system in BTU (British Thermal Units) times inches of thickness per hour per square foot of area per degree F. Room-temperature values for glass lie between 4.23 and 10.10, well below the corresponding values for metals. However, in some applications glass equipment will transfer heat more effectively than metal equipment, in spite of the lower thermal conductivity of the glass.
Re: Build Bed material testing - methods, results and reasons. November 09, 2010 12:59PM |
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Re: Build Bed material testing - methods, results and reasons. November 09, 2010 03:16PM |
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Re: Build Bed material testing - methods, results and reasons. November 09, 2010 05:22PM |
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Re: Build Bed material testing - methods, results and reasons. November 09, 2010 05:48PM |
Admin Registered: 17 years ago Posts: 7,879 |
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@Nophead -Do your nice flat parts warp if you re-heat them again after they have been removed?
Re: Build Bed material testing - methods, results and reasons. November 09, 2010 06:17PM |
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Re: Build Bed material testing - methods, results and reasons. November 09, 2010 09:22PM |
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