The following guidlines is our default general tolerances. Forecast will work with your specific needs to insure that your individual guidelines are met.

SLA & SLS Patterns:

General guidelines for SL Pattern creation:

• SL Pattern standard tolerances are +/-.007" for the first inch and +/-.003" for every inch thereafter.
• Line width for embossed graphics should be at least .016" wide by .016" tall.
• Line width for recessed graphics should be at least .012" wide by .012" deep.
• Features in a vertical build plane should be at least .020" wide.
• Features in a horizontal build plane should be at least .010" wide.
• Overall wall thickness for of a part should be at least .030".
• Wall thickness for tongue and groove applications should be at least .020".
• Gear teeth, blade edges or similar geometry should be thickened at the ends to .010"; the laser will stop building geometry small than the beam's width of .0099".
• Hollow walls or sections will fill with liquid and supports if not addressed early.

Hi-Resolution SLA Patterns:

• SL Pattern standard tolerances are +/-.005" for the first inch and +/-.002" for every inch thereafter.
• Line width for embossed graphics should be at least .010" wide by .010" tall.
• Line width for recessed graphics should be at least .008" wide by .008" deep.
• Features in a vertical build plane should be at least .015" wide.
• Features in a horizontal build plane should be at least .010" wide.
• Overall wall thickness for of a part should be at least .020".
• Wall thickness for tongue and groove applications should be at least .015".
• Gear teeth, blade edges or similar geometry should be thickened at the ends to .008"; the laser will stop building geometry small than the beam's width of .0079".
• Hollow walls or sections will fill with liquid and supports if not addressed early.

ProCast/Hybrid:

Standard tolerances and general guidelines for Hybrid and ProCast parts, (the later being in addition to those mentioned abovefor SL Patterns):

	ProCast	Hybrid
0 - 24"	+/- .007" first inch plus .003" per inch thereafter	+/- .007" first inch plus .0015" per inch thereafter
24.001" - 40"	+/- .003" per inch	+/- .0015" per inch
40.001" +	TBD upon order placement	TBD upon order placement
last updated:06.12.06

 

• Bosses requiring threaded inserts should allow for minimum .040" outside the insert, consult manufacturer's website. We stock PEM and Dodge inserts.
• Overmolding or co-molding should be discussed at the onset of a project for an understanding of the additional requirements.
• Polished surfaces and geometry requiring machined mold inserts require extra time and cost if not quoted as such.
• Dimensions intersecting the parting line may be subject to an additional +/- .015".
• Parts with wall thicknesses under .040" or over .187" may exceed standard tolerances due to warping and excessive shrinkage respectively.
• Foreign resins or resins with a high shrink rate may also interfere with standard tolerances.