Revision as of 01:52, 31 March 2012

Key Performance Specifications

Rotary-to-Linear Motion Converting Stainless Steel Leadscrew and Wear-compensating Leadscrew Nut

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 =Key Performance Specifications=
-*X Axis Travel Range = 20cm
+*X Axis Travel =
-*Y Axis Travel Range = 20cm
+*Y Axis Travel =
-*Z Axis Travel Range = 5cm
+*Z Axis Travel =
-*Step Motor Torque at 12VDC = 3.2kg-cm
+*Step Motor Resolution =
-*Spindle Max Rotation Speed = 22600rpm no-load
+*Accuracy =
+*Step Motor Torque = 3.2kg-cm at 12VDC
+*Spindle Speed = 22600rpm no-load
 *Spindle Motor Torque at 24VDC = 88.5g-cm at max efficiency
-*Workpiece Holding Mechanism = Linear Bolt and Tensioning Nut
+*Repeatability Goal: +/- 0.01mm
-*For Prototype II, define goals based on study of industry standards. Include desired precision + accuracy + speed.
+*Nominal Milling Speed (Copper on FR-4):
-**Minimum step size for each axis plus variance
-**Repeatability of motion (drift) (determined by going to certain locations a large number of times)
-**Minimum spacing between traces (determined by minimum allowable size of bit + precision)
-**Minimum trace size possible
-**Goal: repeatability is as good as step size - ie, all inaccuracy is negligible compared to step size, and zero backlash at all practical milling speeds.
-**Define practical milling speed range based on substrate
 =Key Design Specifications=