The Easson ES-1M DRO Counter is a digital readout system designed for various machining applications, offering a range of functions to enhance precision and efficiency. It is committed to quality, technology, and innovation, providing a comprehensive solution for operators.

Function Description

The ES-1M DRO Counter offers a wide array of functions, categorized as follows:

1. Basic Functions:

Set Display to Zero: Allows the operator to set the current position for a specific axis to zero.
Inch/Metric Display Conversion: Enables switching between inch and metric display units.
Enter Dimensions: Facilitates entering specific dimensions for an axis.
Resolution Display Switches: Provides options to switch between 0.005 / 0.01 resolution displays.
ABS/INC Coordinates Display Switches: Allows toggling between absolute (ABS) and incremental (INC) coordinate displays. ABS coordinates refer to the work piece datum (work piece zero position), while INC coordinates are for relative position machining. The work piece datum is retained in ABS coordinate display even when switching to INC.
Centre-find: This function helps locate the center of a work piece by halving the current display coordinate. It involves using an edge finder at two opposite ends of the work piece and then halving the displayed coordinate.
Sleep Function: Designed for power saving and extended service life. The ES-1M can enter a sleep mode, switching off the transducer display and other non-essential components. It can be put into sleep mode manually or automatically after a period of inactivity. The display will show "MOVED" if the machine is moved during sleep mode, or "KEYED" if a key is pressed.

2. REF Datum Memory:

Function: The REF datum memory allows the operator to store and recall a permanent fixed mark or reference point on the transducer. This is particularly useful in cases of power failure or accidental movement of the work piece, as the original work piece datum (zero position) can be recovered by presetting the display zero position as the stored reference point.
Find the Scale's REF Mark Position (FIND REF): This procedure involves selecting the REF function, moving the machine to find the REF mark, and then recalling the REF mark position.
Recall the Work Datum Zero (RECALL 0): This function allows the recovery of the work piece datum if it is lost for any reason, by recalling the RECALL 0 function.

3. 199 SubDatum Function:

Function: This feature provides 199 sub-datums (SDM) for memory, allowing the operator to set and store multiple work co-ordinates (ABS/INC). This is beneficial for repetitive machining tasks, as it eliminates the need to re-establish the work piece datum using an edge finder or other methods.
Application Example: The manual illustrates setting up four sub-datums (SDM 1 to SDM 4) and moving the machine to the required sub-datum position. It also describes direct keying in the SDM zero position co-ordinates.
Usage Features: The operator can switch between sub-datums using UP/DOWN keys and directly input sub-datum coordinates.

4. Built-in Calculator:

Function: The ES-1M integrates a built-in calculator that supports normal mathematical calculations (add, subtract, multiply, divide) and trigonometric functions (SIN, COS, TAN, SQRT). It also features a "Result Transfer" function, which allows calculated results to be temporarily transferred to any axis, setting the zero position at the calculated value.
Usage Features: The calculator can be accessed via a dedicated key, and results can be transferred to X, Y, or Z axes. It includes clear/restart functions.

5. LHOLE Function (Tool Positioning for a Line of Holes):

Function: This function simplifies drilling a line of holes by guiding the operator through setting parameters like Line Angle (LIN ANG), Line Distance (LIN DIST), and Number of Holes (NO. HOLE).
Usage Features: The system calculates and displays the positions for each hole, allowing the operator to move the machine to the calculated coordinates. It also allows temporary swapping to normal XYZ display and returning to the LHOLE function.

6. INCL Function (Inclined Surface Datum Tool Positioning):

Function: This function assists in machining inclined surfaces by allowing the operator to set an inclined datum. It supports both XY plane and XZ/YZ plane machining.
Usage Features: The operator enters the inclined angle (INCL ANG) and Z increment per step machining (Z STEP). The ES-1M provides visual guidance and simulated Z-axis movement to aid in positioning the tool.

7. PCD Function (Tool Positioning for Pitch Circle Diameter):

Function: This function facilitates drilling holes on a Pitch Circle Diameter (PCD). It guides the operator through setting parameters such as Centre Coordinate (CENTRE), Diameter (DIA), Number of Holes (NO. HOLE), Start Angle (ST. ANG), and End Angle (END ANG).
Usage Features: The system calculates and displays the positions for each hole on the pitch circle, allowing the operator to move the machine to the calculated coordinates.

8. R Function (Tool Positioning for ARC Machining):

Function: This function is designed for machining round corners or arc surfaces in mould making. It offers two main modes: "One off job" for single arc surfaces and "Only simple ARC surface or round corners" for simpler tasks.
Usage Features: The operator defines the work plane (XY, XZ, or YZ), R's Centre (CENTRE), R's Radius (R), R's Start point (ST. PT), R's End point (END PT), Tool Diameter (TOOL DIA), and Tool Compensation (R+TOOL or R-TOOL). It also includes options for Z incremental step machining (Z STEP) or Maximum Cut (MAX CUT). The system simulates Z-axis movement for precise positioning.

9. Simplified R Function:

Function: This is an easier-to-use version of the R function, designed for simpler arc machining tasks. It incorporates eight types of ARC and allows the operator to select the desired type, input radius, tool compensation, and increment per machining step.
Usage Features: Similar to the full R function, it guides the operator through defining the work plane, preset R type, radius, tool diameter, tool compensation, and Z increment/maximum cut. It also provides Z-axis simulation.

10. Shrinkage Calculation:

Function: This function compensates for material shrinkage during plastic injection processes. It allows the operator to input a shrinkage factor, and the DRO will display expanded dimensions for machining the mould cavity.
Usage Features: The operator enters the shrinkage factor, and the system automatically calculates and displays the compensated dimensions. It also allows toggling between expanded and normal dimensions.

11. ES-1M Setup Function:

Function: This menu allows the operator to configure various parameters of the DRO, including sleep mode, counting direction, linear error compensation, reference point signal, Z dial parameters, Z increment for ARC machining, DRO axis number, R mode settings, DRO type (MOULD/MILL), and restoring factory preset values.
Maintenance Features: This function is crucial for initializing parameters after abnormal operations or program version changes. It includes a self-test and RAM test procedure.
Setup Procedure: The setup process involves turning off and on the DRO, pressing specific keys to enter the setup menu, and then navigating through various options to configure the system.

Important Technical Specifications

Axis Support: The ES-1M supports 2-axis and 3-axis configurations, with specific functions tailored for each. For example, the 2-axis ES-1 does not have a Z-axis, and the system uses the unused axis display to show Z dial turn number and Z dial reading during ARC machining.
Resolution: The display can be switched between 0.005 and 0.01 resolution.
Linear Error Compensation: The system allows for linear error compensation, calculated as: error value X - (1000 / measuring length) = compensation value. The compensation value is in micrometers (μm).
Reference Point Signal: Supports two types of electronic signals for the reference point: one associated with a rise in voltage (Normal Voltage = 0V, At ref point = 5V) and another with a drop (Normal Voltage = 5V, At ref point = 0V).
Z Dial Travel: For Taiwanese type milling machines, the Z dial travel is typically 2.5mm.
Dial Increment: For Taiwanese knee-type milling machines, the minimum Z-axis increment is 0.02mm.
Software Packages: The DRO supports "MOULD" and "MILL" software packages. The "MOULD" package includes shrinkage calculation, while "MILL" excludes it. A "BASIC" option removes complex functions and returns to basic plus calculator functions.

Usage Features

User-Friendly Interface: The ES-1M features a clear display and a keypad with dedicated function keys, making it intuitive to operate.
Guided Operations: Many complex functions, such as LHOLE, INCL, PCD, and R functions, are guided step-by-step through message screens, simplifying the machining process.
Coordinate Systems: Supports both Absolute (ABS) and Incremental (INC) coordinate displays, providing flexibility for different machining strategies.
Datum Management: Offers robust datum memory (REF) and multiple sub-datums (SDM) to manage various work piece origins efficiently.
Calculator Integration: The built-in calculator with result transfer streamlines complex calculations and direct input into axis displays.
Error Compensation: Linear error compensation can be applied to improve machining accuracy.
Power Saving: The sleep function helps conserve power and extend the life of the device.

Maintenance Features

Parameter Reset: The ES-1M includes an original parameter reset function to restore the system to its default settings in case of inscrutable cases or improper operations. This involves a specific key sequence during power-on.
Self-Test and RAM Test: During the parameter reset procedure, the DRO performs a self-test and RAM test, displaying "RAM TEST" and "RAM OK" messages to indicate system health.
Setup Menu: The comprehensive setup menu allows for configuration and calibration of various parameters, ensuring the DRO operates optimally for specific machine types and applications.
Software Package Selection: The ability to select different software packages (MOULD, MILL, BASIC) allows for customization based on machining needs, potentially simplifying the interface for less complex tasks.
Error Compensation Validation: After using the error compensation function, it is necessary to power cycle the DRO to validate the compensated values, ensuring accuracy.

Easson ES-1M - Page 27

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