DIAMETER SAMPLING SYSTEM FOR SMALL PINS AND ROLLERS

DIAMETER SAMPLING SYSTEM FOR SMALL PINS AND ROLLERS

The Diameter Sampling System for Small Pins and Rollers provides the manufacturer of precision pins and rollers a means of performing quality audits for manufactured lots without operator influences on the measurements. The operator is required only to load the sample lot of parts onto the input feed track and initiate the lot measure cycle. The system also provides a convenient means of conducting incoming and outgoing inspection audits at a manufacturer’s and customer’s facility.

The system is easily set to any part within the system measuring range. The operator needs only to set the part hold-in guide, the stop anvil, and the spacing between the measuring contacts. All settings are easily performed using sample parts to set the device positions. The system can be easily reconfigured to a different part in one to two minutes. Once configured an automatic zero cycle must be performed to set the system to the operating point, and then the system is ready to measure the lot of parts. Based on the part characteristics an occasion setting may be done to the system feed angle to produce a quicker part to part drop time along the inclined feed track.

To perform the lot measurement, the operator must load the lot of parts into the system feed track. Once loaded, the lot measurement may be started. The system will automatically tram a pair of measuring contacts arranged in a mechanical differential mode past the part maximum diameter. The differential displacement will be transduced by a precision LVDT gauging probe. A large number of points will be input about the maximum diameter. A best fit quadratic function will be fit to this data and the maximum evaluated. This value will become the part diameter which will be saved to the data file. Once measured, the part will be escaped from the end of the track into the pan, and the cycle will be repeated until all parts have been measured.

The saved data will then be displayed in a histogram format on the provided VGA display to indicate the lot status to the operator. The display will also include the lot size, actual measurement values, average diameter, min. diameter, max. diameter, sigma, and CPK. The system can also be optionally configured to operate over a network such that the data results are immediately available to a central Q.C. computer. Here, further lot statistics may be computed and hard copy outputs of the results printed. As an option the Diameter Sampling System can perform the statistical processing and hard copy output as well.

The system electronics consists of a ruggedized IBM PC compatible processing platform, which is interfaced to the measure motor escapement cylinders and measurement probes. The VGA display and full alpha/numeric keyboard provide a complete operator interface for performing setup, measurement, and out put display selections.

SPECIFICATIONS

MOUNTING:………………………………………………………………………………Bench Top Unit

FOOTPRINT:……………………………………………………………………….12”W X 18”L X 16”H

POWER REQ:…………………………………………………………………………115VAC, 60Hz @2A

SHOP AIR REQ:………………………………………………………………45 PSI min. @0.25 SCFM

PART RANGE:……………………………………..0.062” -0.250” diameter X 0.0090” X 1.250” length

INPUT TRACK:……………………………………………………………16” with add on 12” extension

CYCLE TIME:……………………………………………………………….……2 seconds per part (Max.)

REPEATABILITY:…………………………………………………………………………..+/-0.000002”

ACCURACY:…………………………………………………………………………………..+/-0.000004”

OPTIONS

ETHERNET INTERFACE MODULE

STATISTICAL ANALYSIS APPLICATIONS SOFTWARE

PRINTER FOR HARD COPY OUTPUT