Chapter 1
7
UM10349_PCNC1100_Manual_0916A
Preface
Resolution, Accuracy, and Repeatability
The following table summarizes resoluon, accuracy, and repeatability of PCNC mills as delivered.
Resolution of Motion (minimum discrete positional move) 0.0001”
Ball Screw Positional Accuracy ≤ 0.0006” per foot
Combined Positional Accuracy
1
≤ 0.0013” per foot
1
Includes addional contribung factors such as compressibility of bearings, ball screw windup, fricon, etc.
Each PCNC Mill ships with a Cercate of Inspecon. This report details quality assurance
measurements performed at the factory by a Tormach quality assurance team member on each mill
prior to shipping.
A sample cercate of inspecon and more informaon on quality assurance measurements is
available at: hp://www.tormach.com/quality_overview.html
In pracce, accuracy and repeatability are heavily inuenced by the techniques used by the
machinist. A skilled machinist can oen deliver accuracy that exceeds the accuracy specied by
the manufacturer, while an inexperienced machinist may have diculty delivering the expected
accuracy. With this understanding, Tormach cannot predict operator accuracy. Nevertheless, the
accuracy specied by the manufacturer remains an important reference point.
Nomenclature
This manual uses the following typographical nomenclature.
Soware Control
Refers to a Software Control, i.e., an on-screen button
Hardware Control
Refers to a button or switch on mill’s Operator Panel
G-code (e.g., G01X34.8)
Used to show G-code programs
Key name (i.e., Enter)
Tells you to press the indicated key
Buon name (i.e., Stop)
Tells you to press the indicated button
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