CAMT Machine Calibration & Process Parameters Flashcards
6 cards from real CAMT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CAMT Machine Calibration & Process Parameters flashcards as text
How does increasing nozzle temperature in FDM printing generally affect interlayer adhesion?
Answer: Higher temperatures generally improve interlayer adhesion up to a material-specific maximum
Higher extrusion temperatures increase polymer chain mobility and diffusion across layer interfaces in FDM, improving interlayer bonding strength up to the point where material degradation begins.
In laser powder bed fusion, what is the primary effect of increasing laser power on the melt pool?
Answer: It increases melt pool size and depth, improving fusion but risking keyhole porosity at excess levels
Higher laser power in LPBF enlarges and deepens the melt pool, improving powder fusion and part density, but excessive power creates keyhole defects from vapor cavity formation beneath the melt pool.
What is Volumetric Energy Density (VED) in laser powder bed fusion, and why is it a key process parameter?
Answer: Energy delivered per unit volume of powder, directly controlling fusion quality and porosity
VED quantifies energy delivered per unit powder volume (Power ÷ [Scan Speed × Hatch Spacing × Layer Thickness]), serving as the primary predictor of part density, microstructure, and defect level.
How does increasing print speed in FDM typically affect the trade-off between productivity and part quality?
Answer: Higher speed increases throughput but typically reduces dimensional accuracy, surface finish, and layer adhesion
Increasing FDM print speed reduces build time but can degrade dimensional accuracy, surface finish, and interlayer bonding due to inconsistent material flow rates and reduced interlayer dwell time.
What is 'hatch spacing' in laser powder bed fusion, and how does it affect part density?
Answer: The lateral distance between adjacent laser scan tracks, affecting melt pool overlap and density
Hatch spacing is the lateral offset between adjacent laser scan tracks; smaller spacing increases melt pool overlap, improving density and reducing porosity, but increases scan time per layer.
Why is a heated build plate critical when printing ABS filament on an FDM machine?
Answer: A heated plate minimizes thermal gradients in the part, reducing warping and layer delamination
ABS has a high coefficient of thermal expansion and contracts significantly as it cools; a heated bed maintained at 90–110°C reduces the temperature gradient between deposited layers and the ambient environment, preventing warping.