Caliper2PC - Digital Caliper and PC Based Digital Readout

Caliper2PC - Digital Caliper and PC Based DRO (Digital Readout) & Tachometer for Mill, Lathe, Drilling Machine and 3D Digitizer

Auto Capture

Auto Capture

Excel Interface

Excel Interface

Caliper with Capture Button

Caliper with Capture Button

Encoder

Encoder

Relais Control Panel

Relais Control Panel

Display Settings

Display Settings

Control Panel

Control Panel

Digital Readout

Digital Readout

Top Slide DRO

Top Slide DRO

Optimum Lathe with Caliper2PC DRO and Touchscreen

Optimum Lathe with Caliper2PC DRO and Touchscreen

Circle Center Finder

Circle Center Finder

Work Piece Center

Work Piece Center

Cone Calculator

Cone Calculator

Holes Coordinates

Holes Coordinates

Bolt Hole Circle

Bolt Hole Circle

Linear Pattern

Linear Pattern

Tachometer Settings

Tachometer Settings

Tachometer

Tachometer

Mach3 Caliper2PC

Mach3 Caliper2PC

Mach3 Modbus

Mach3 Modbus

Excellon

Excellon

Virtual Interface

Virtual Interface

Digital Caliper Readout Mill Lathe

Digital Caliper Readout Mill Lathe

DigiMAG

DigiMAG

Glass Scale

Glass Scale

Video Edge Finder

Video Edge Finder

Android DRO

Android DRO

Milling Machine

Milling Machine

Interface

Interface

Emco

Emco

Mill DRO

Mill DRO

Shielded Cables

Shielded Cables

RPM Sensor

RPM Sensor

Tailstock

Tailstock

Apron Carriage

Apron Carriage

Compound Rest

Compound Rest

Cross Slide

Cross Slide

Touchscreen

Touchscreen

quantum D210x320E

quantum D210x320E

Bernardo

Bernardo

PROFI 550 LZ

PROFI 550 LZ

Bernardo Mill

Bernardo Mill

Dividing Head

Dividing Head

Scales XY-Axis

Scales XY-Axis

Warco Mill Drill

Warco Mill Drill

.New! Caliper2PC with rotary axis DRO. Caliper2PC with Video Edge Finder. Caliper2PC supports glass scales and rotary encoders with 5V TTL quadrature output, the new BIN6 (24 Bit) protocol used in Harbor Freight digital calipers, iGaging DigiMAG ™ (21 Bit) protocol, as well as Mitutoyo Digimatic ™ devices. Soon: Caliper2PC with digital pantograph function. Caliper2PC software with Feed Rate Display and On Screen Keyboard for Touchscreens! Caliper2PC supports TCP Modbus for Artsoft's ™ CNC software Mach3 ™! CNC machines with step motors can be controlled, lost steps can be found at run time

 

By Tomer Lanzman

 

Lowly priced digital calipers have been available on the market for some years. Most of them are produced in China or the Far East and possess a serial interface, over which measuring data can be transferred to other devices. Despite their price ($10 - $20) these calipers are very reliable and precise. Apart from the original use as calipers, they can be used as position display or Digital Readout DRO for linear axles of small machine tools in the same way as linear glass scales. For this purpose digital scale readouts with mounting brackets are available in different lengths. In small CNC machines these scales can serve as reference givers and tool length givers. Even a 3D Digitizer / 3D Scanner for 3D measurements as well as tensile tests can be easily implemented. A complete workshop can be digitized for little money.

 

Digital Caliper Readout Mill Lathe

 

fig. 1: Sample Application of the Caliper2PC Interface, Screenshots Excel Interface and Caliper2PC Software. 

 

To use the measuring data (capturing, displaying, converting etc.), it is necessary to connect the digital calipers to a PC using their serial interfaces. For this purpose the interface and multiplexer Caliper2PC has been developed and is described here (see video).

Within the scope of this project the hardware and software required to equip the machines accordingly have been designed. The result is a future-oriented, user-friendly and adaptable system which offers aside from the numerous implemented features, space for own additions (API - software interface).

 

Milling Machine

 

fig. 2: Milling Machine with Caliper2PC DRO X,Y,Z and glass scales.  

Optimum Lathe with Caliper2PC DRO and Touchscreen

 

fig. 3: Optimum Lathe with Caliper2PC DRO and Touchscreen.  

 

The communication between the multiplexer Caliper2PC and the host PC occurs via USB. No external power supply is required, since the Caliper2PC is power-supplied by USB from the host PC. The Caliper2PC offers on the input side connections for up to 6 digital calipers. This way it is possible to connect, for example, a milling machine (3 axes; x-, y-, and z-axis), a lathe (2 axes) and an additional digital caliper for the QA (see fig. 1). To connect the digital calipers to the Caliper2PC interface, a connecting lead must be attached (see chapters "Pin Assignment" and "Retrofitting Calipers" ).

All supported linear encoders can be used simultaniously (e.g. glass scales, linear scales and Mitutoyo Digimatic devices). The DROs can be reset to zero or to any given value in any position. For every linear encoder the Caliper2PC interface offers an additional input port for an edge finder or to connect a pedal switch to capture the momentary value for instance (see chapter "Retrofit with Capture Button"). Alternatively, reference switches or end switches used with CNC machines can be connected to detect and process the switch states. The Caliper2PC software can be used with a webcam as a video edge finder.

In addition, two tachometers are implemented in the Caliper2PC interface. This allows displaying and regulating tool machines' spindle speeds.

 

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Copyright © Tomer Lanzman. All rights reserved.