Hofmann geodyna 6300 - User Manual

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Calibration instructions geodyna 6300

Page 1 of 8

Date 2 Oct 2001

Basic settings of diameter and distance potentiometers with code

C80

Service and test functions become accessible by simultaneously

pressing and holding the C and the balancing mode keys and by

rotating the main shaft.

… is read out for 1 second.

The display proceeds automatically to the basic settings.

Then the basic settings of .15 to .2 Volt of the diameter and distance

potentiometers are read out.

The left-hand reading refers to the basic setting of the diameter potentiometer.

Engage the calibration tip of the gauge head with the calibration groove in the

board of the vibratory system. If the slider voltage of the diameter potentiometer

is not within a range of .15 to .20 Volt, turn the potentiometer shaft to bring the

voltage to within this range.

The right-hand reading refers to the basic setting of the distance potentiometer.

If the gauge arm is in left home position and if the slider voltage of the distance

potentiometer is not within a range of .15 to .20 Volt, turn the potentiometer

shaft to bring the voltage to within this range.

Return the gauge arm into the left home position and press the C key to store

the values.

The following reading appears:

Fully pull out the gauge arm, hold, and press the C key to store the value.

The following reading appears:

Engage the calibration tip on the bottom of the gauge head with the calibration

groove in the board of the vibratory system and press the C key to store the

value.

C80.

0,17 0,16

2 0,16

3 0,16

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The geodyna 6300 is a sophisticated balancing machine designed for precise calibration and measurement tasks, primarily focused on wheel balancing. Its operational framework is built around a series of calibration codes (C80, C81, C82, C83, C84, C90) that allow for detailed adjustments and measurements of various components, ensuring high accuracy in its primary function.

Function Description

The core function of the geodyna 6300 is to accurately measure and compensate for unbalance in rotating components, typically vehicle wheels. This is achieved through a multi-step calibration process that involves setting up and verifying the machine's internal sensors and mechanical components.

Basic Settings (Code C80): This initial calibration step focuses on the diameter and distance potentiometers. These potentiometers are crucial for accurately determining the dimensions of the wheel being balanced. The process involves engaging a calibration tip with a specific groove on the vibratory system board and adjusting the potentiometer shafts until the slider voltage falls within a specified range (0.15 to 0.20 Volt). This ensures that the machine correctly measures the wheel's diameter and the distance to the unbalance planes. The gauge arm's home position is also calibrated here.
Measuring Adaptor Flange and Zero Plane (Code C81): This calibration step establishes the machine's reference zero plane. By applying the gauge arm to the contact surface of a test rotor, the machine learns the precise location of its measurement origin, which is essential for accurate unbalance calculations.
3D SAPE Calibration of Width Gauge Arm (Code C82): The 3D SAPE (Semi-Automatic Parameter Entry) system allows for automatic measurement of wheel dimensions. This calibration specifically targets the width gauge arm. It involves setting the width potentiometer's slider voltage within a range of 4.25 to 4.30 Volt when the arm is in its right home position. Subsequent steps involve applying the gauge head to the adaptor flange and then to a calibration weight, allowing the machine to accurately measure wheel width.
Calibration of Unbalance Measurement (Code C83): This is a critical calibration for the machine's primary function. It involves clamping a test rotor and entering its specific dimensions (15" diameter, 6.5" width). The machine then performs a measuring run. Based on the suggested calibration weight (e.g., 100 grams), a weight is inserted into the left-hand plane of the test rotor, and another measuring run is performed. The calibration weight is then moved to the right-hand plane, and the process is repeated. This step also involves reading the ambient transducer temperature (e.g., 21 TEMP) and performing electrical compensation for residual adaptor unbalance. This comprehensive process ensures that the machine accurately detects and quantifies unbalance.
Calibration of Residual Unbalance of Main Shaft and Drive Pulley (Code C84): This calibration focuses on the machine's internal rotating components. By performing a measuring run without a wheel, the machine can identify and compensate for any inherent unbalance in its main shaft and drive pulley, further enhancing the accuracy of subsequent wheel balancing operations.
Storing Calibration Data (Code C90): After all calibration steps are completed, the data must be stored using code C90. This ensures that the calibrated settings are retained for future use, preventing the need for recalibration before each use unless specific conditions warrant it.

Important Technical Specifications

While specific numerical specifications like motor power or maximum wheel weight are not explicitly detailed in the provided text, the calibration procedures highlight several key technical aspects:

Voltage Ranges for Potentiometers: The diameter and distance potentiometers operate within a slider voltage range of 0.15 to 0.20 Volt. The width potentiometer operates within a range of 4.25 to 4.30 Volt. These precise voltage ranges are critical for accurate sensor readings.
Calibration Weight: A standard calibration weight of 100 grams is used for unbalance measurement calibration.
Test Rotor Dimensions: A test rotor with a 15" diameter and 6.5" width is used for unbalance calibration.
Temperature Compensation: The machine incorporates ambient transducer temperature measurement (e.g., 21 TEMP) as part of its calibration process, indicating a mechanism for temperature-dependent compensation to maintain accuracy across varying environmental conditions.
Display Readout: The machine features a digital display that provides real-time feedback during calibration, showing readings like potentiometer voltages, step numbers, and suggested weights.

Usage Features

The geodyna 6300 is designed with user-friendly features that streamline the calibration and balancing process:

Service and Test Functions Access: These functions are accessed by simultaneously pressing and holding the "C" and balancing mode keys while rotating the main shaft. This secure access mechanism prevents accidental changes to critical settings.
Automated Display Progression: The display automatically proceeds through calibration steps, guiding the user without manual intervention for each transition.
Gauge Arm for Measurement: The machine utilizes a gauge arm for precise engagement with calibration points and wheel surfaces, simplifying the measurement process.
"C" Key for Storage: The "C" key serves as a universal command for storing values and confirming steps, providing a consistent user interface.
"START" Key for Measuring Runs: The "START" key initiates measuring runs, making the operation straightforward.
Precision Key: A "precision key" (implied by "press and hold the precision key and rotate the main shaft to set the actual weight") allows for fine adjustments during calibration, ensuring high accuracy.
STOP Key: The "STOP" key is used to exit the service mode, returning the machine to normal operation.

Maintenance Features

The calibration procedures themselves can be considered a form of preventative maintenance, ensuring the machine operates within its specified parameters.

Regular Calibration: The detailed calibration steps for potentiometers, zero plane, width gauge, and unbalance measurement suggest that regular calibration is a key aspect of maintaining the machine's accuracy and performance. This is crucial for ensuring the longevity and reliability of the balancing results.
Potentiometer Adjustment: The ability to turn potentiometer shafts to bring slider voltages within range indicates a design that allows for mechanical adjustments to compensate for wear or drift over time, extending the lifespan of these critical components.
Electrical Compensation: The inclusion of "instantaneous electrical compensation of residual adaptor unbalance" highlights a sophisticated internal system that actively corrects for minor imbalances within the machine itself, reducing the need for frequent manual adjustments for such issues.
Diagnostic Feedback: The display of specific readings (e.g., potentiometer voltages, temperature) during calibration provides valuable diagnostic feedback, allowing technicians to identify and address potential issues before they impact balancing accuracy.

In summary, the geodyna 6300 is a robust and precise balancing machine, designed with a comprehensive calibration system that ensures high accuracy and reliability in its operation. Its user-friendly interface and built-in maintenance features contribute to its effectiveness in professional workshop environments.