Polyjet Systems

Stratasys Objet Connex 260 Polyjet Printer, Stratasys Objet Eden 260 Polyjet Printer

Materials: Type: Proprietary acrylate based polymer. Rigid White & Flexible Translucent (which can be combined to achieve intermediate mechanical properties).  Alternatively, Rigid Translucent/Clear (Clear achieved with polishing)
Properties:
Variable mechanical properties but moderately low yield stress at highest stiffness. Behaves much like standard acrylic, unless blended with flexible material.  Alternative materials can be rubber-like in mechanical properties, or clear/translucent.

Accuracy: Extremely high: 16/32 micron layer thickness, Overall 0.05mm to 0.15 mm accuracy (depending on geometry).  Smallest free-standing feature approximately 0.25mm to 0.3mm Support Structures:  Gel-Like secondary material (Removed with water jet).  

Maximum Build Dimensions: 10.2×10.2×7.9 inches (260x260x200 mm)(Both Systems, single or multimaterial)

Build Time: Total: 30 minutes – 5+ Hours (dependent on geometry & size)
*Turnaround time is workload dependent.  Expedited parts may come with an additional fee.

Cost: UC: (at cost) Standard Material (Rigid and Flexible):  $5/10 grams of build material + $3/10 grams of support material + $3/hr of build time + setup and cleaning fee. Clear Material:  $7/10 grams of build material + $4/10 grams of support material + $3/hr of build time + setup and cleaning fee. Outside UC: 32% Premium (above cost)

Pros: Extreme accuracy, Parts can be printed as functional assemblies, functional prototypes (or direct application in light-duty).  Variable mechanical properties.  Near limitless geometric configurations

Cons: Material (generally) not as strong as FDM, or SLA techniques. Cost is comparatively higher than FDM or SLA.

FDM Systems

Raise3D N2, Raise3D N2 Plus, MakerBot Modified/Custom Replicator II, Markforged Mark Two Onyx

Materials: Type: ABS Plastic, PLA, other thermoplastics Properties: ABS –  Very High Yield Stress, standard engineering plastic. PLA – Plant derived plastic; Biodegradable. more rigid, more accurate than ABS.

Accuracy: Moderate/Good accuracy: 0.1mm minimum layer thickness (0.2mm standard), Overall 0.2-0.4mm accuracy depending on geometry. Smallest free-standing feature approximately 0.4mm Support Structures: Same Material, or overhang structures where possible

Maximum Build Dimensions12x12x24 inches (305x305x610 mm) – Raise3D N2 Plus, 12x12x12 inches (305x305x305 mm) – Raise 3D N2, 11.2×6.0×6.1 inches (285x153x155mm) – MakerBot

Build Time: Total: 15 minutes to 24+ Hours (dependent on geometry & size)
*Turnaround time is workload dependent.  Expedited parts may come with an additional fee.

Cost: UC: Black or White ABS or PLA: $4/10 Grams + $3/hr of build time + Setup and CleaningOutside UC: 32% Premium (above cost)

Pros: High impact resistance, good accuracy. Less Expensive.

Cons: Least accurate technique (visible layers), some geometry may not be printable.

SLA System

Formlabs Form 2 with automated Form Wash and Form Cure stations.

Materials: Type: Methacylate Photopolymer Resin Properties: (Similar to ABS) Higher yield point than Polyjet Prints.*Contact for Mechanical Properties

AccuracyGood accuracy: 0.025mm to .1mm Layer Thickness.  0.1-0.3mm Overall Accuracy depending on geometry.  Minimum Feature 0.3mm.Support Structures: Posts which must be cut from body of printed part

Maximum Build Dimensions4.9×4.9×6.5 inches (125x125x165 mm)

Build TimeTotal: 4 hours to 24+ Hours (dependent on geometry & size)
*Turnaround time is workload dependent.  Expedited parts may come with an additional fee.

CostUC: Photo-Curing Resin: $4/10 Grams + $3/hr of build time + Setup and CleaningOutside UC: 32% Premium (above cost)

ProsVery rigid plastic with good impact resistance, great accuracy.

ConsSupport Posts may leave blemishes,  small build chamber