Ovation Engineering Inc The System Please click tab

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Welcome to the EZ-Comp System. • The EZ-Comp System automatically corrects for tool wear and other process deviations by transmitting measured values directly into the CNC offset tables! • This makes The EZ-Comp System an invaluable tool in CNC productivity.

What Is the EZ-Comp System? • The Ovation Engineering EZ-Comp Programmable Tool Compensation Interface helps to eliminate machine down time and part size errors due to manually entered tool offset data by automatically transferring tool offset data into the CNC control’s offset tables. Data can be collected and processed from a variety of gaging devices and SPC software packages.

How The EZ-Comp Works. • The EZ-Comp collects data in real time from a gaging device or SPC software. It then calculates a statistical or fixed running average for each controlled feature and compares the average to user programmed tool compensation limits. If the average exceeds the limit, the required tool receives a compensation.

System Capabilities • The system is capable of providing offset data for up to 20 measured features. Each feature will correspond to a channel in the EZ-Comp. The size control for each of these features is accomplished by automatically changing tool offset values in the CNC control. The EZ-Comp interfaces to the machine's controller through either an RS 232 serial port or parallel I/O.

Why Compensate for Tool Wear Automatically? • Automatic tool compensation allows the operator to focus on tasks other than entering offset data into the control. It also eliminates the possibility of entering erroneous data, or transposing data values (i. e. , . 0051 instead of. 0015) In addition, the EZ-Comp makes compensation decisions based upon a running average, as opposed to single part measurements. This provides for a much more stable response to variation by providing a “filtering” effect on the data. The result is that small, “normal” , erratic, and unpredictable variations in the process are ignored, while large and consistent variations (such as tool wear) are compensated.

Principles of Operation and Parameter Definitions. • • Upper and Lower Tool Compensation Limits Comp Target Max Comp Skip Trend Direction Upper and Lower Reject Limits Tool Compensation Algorithm

Upper & Lower Tool Compensation Limits • The Upper & Lower Tool Compensation limits are values that are programmed on a per tool basis. The Upper & Lower Tool Compensation limits determine the process level (running average) that must be reached before an offset will be sent to the CNC. This parameter is usually expressed as deviation from mean. If the process running average is within these limits, no compensation will be sent on the current cycle.

Comp Target • This is the process target value. This parameter is used to anticipate process trends by compensating to a value other than the mean. Set this parameter to the desired process level to be reached on each comp. This parameter is usually expressed as deviation from mean. To target the mean, set this parameter to zero. The EZ-Comp uses a default value of +0. 0000

Max Comp • This is the maximum amount of compensation that can be sent on any given cycle. If the calculated comp amount exceeds this value, the compensation that sent will be equal to the Max comp value. If the Max Comp value hasn’t been programmed, the EZ-Comp uses a default value, which is based on the setting of the resolution parameter. (The Max Comp cannot exceed the comp range of the system. )

Skip • This value represents the number of parts that exist in the queue between the operation creating the compensated feature and the gage that is measuring the compensated feature. This value specifies how many parts will be gaged after a compensation, before the first part affected by the comp will reach the gage. Set this parameter to a value greater than zero if non-compensated parts will reach the gage after a compensation is sent. The default value for this parameter is zero.

Trend • This value indicates the number of gage readings used to calculate the running average. The EZ-Comp uses a default value of 1.

Comp Direction • This parameter determines whether the sign of the calculated compensation value will be reversed before being transmitted to the CNC offset tables. Normally the comp sign will be the opposite of the calculated trend in order to correct the process back toward the mean. The default value is POS (Positive). If the unit is compensating in the wrong direction change this parameter to NEG (Negative). Negative Comp direction is often necessary when a cut-off tool is compensated to control part length.

Upper and Lower Reject Limits • Data received from the gage that is outside of these limits will not be used in the compensation algorithm.

EZ- Comp Tool Comp Algorithm. • The EZ-Comp software uses exclusive algorithms for calculating the current process level after every gaging cycle. This process level is compared to the programmed tool comp limits for making comp decisions. If the calculated process level exceeds one of the comp limits, an offset is sent to the CNC control such that the process will be brought back to the mean or the programmed target level.

Machine Tool Interface • The interface between the EZ-Comp, the machine tool, and the gage may be achieved by a variety of different methods. The installation technician will determine the optimum method for the type of CNC and gage system being used.

Ease of Use • Once installed, the EZ-Comp System begins to generate automatic offsets. This starts the cycle of creating and maintaining a useable product based on specific work piece tolerances. All of this is done so efficiently that the benefits of the EZ-Comp System will be recognized immediately.

Can you afford not to have the EZComp n System? • The EZ-Comp System saves you time, labor, and materials. Stop throwing money away CALL US TODAY! Return to ovationengineering. com