Grindline

The Grindline.X Laser System has been specially designed for on-line gauging of the outside diameter of products manufactured by plunge type centreless grinding machines like electric motor shafts, or any other part having a single or several diameters to be checked.

The main functions of the system are as follows:

  • Through-feed measurement up to 10 diameters (Grindline.X)
  • Tolerance checking and output alarms for part sorting
  • Real-time grinder regulation
  • Processing and printing of statistical reports
  • Interface with remote computer
  • Zero-defect production: the 100% inspection allows for out of tolerance parts to be detected and discarded, avoiding any risk of rejects or later complaints
  • Reduction of scrap: the real-time grinder regulation prevents machining out-of-tolerance pieces
  • Labour savings: the unsupervised automatic control makes lighter work for the grinder operating staff
  • Quality certification made easier: the on-line gauging makes random sample checks redundant and allows the printing of detailed reports to prove Product Quality and Process Capability
     

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Grindline X40/A X40/B X80/A X80/B
Type of gauge XLS40/1500/A XLS40/1500/B XLS80/1500/A XLS80/1500/B
Measuring field (mm) 40 80
Measurable diameters (mm) 0.1 - 38 0.06 - 38 0.75 - 78
Resolution (selectable) (μm) 10 / 1 / 0.1 / 0.01
Linearity (centred product) (μm) ± 0.5 ± 1
Linearity (in the measuring plane) (μm) ± 0.5 ± 2
Repeatability (T=1s, ±3σ) (μm) ± 0.1 ± 0.3
Single shot repeatability (±3σ) (μm) ± 2.5 ± 5
Beam spot size (s,l) (mm) 0.08 x 2 0.06 x 0.1 0.4 x 3.5 0.4 x 0.2
Side dither of the scanning plane (mm) ± 0.1 ± 0.2
Scanning frequency (Hz) 1500
Scanning speed (m/s) 300 588
Gauge thermal coefficient (μm/m°C) -11.5
Laser source VLD (Visible Laser Diode); λ = 650nm
Dimensions (mm) 500 x 134 x 68.5 787 x 170 x 60
Weight (kg) 4.2 7

The basic package includes the following functions:

  • It measures up to 10 different diameters on the same part
  • Display of measured values and their shifts from the nominal set points
  • Diagram of the measuring deviations
  • Automatic recognition of the selected ground lengths and filtering of all shape irregularities
  • Parts being checked can be transported by conveyor or gantry loader
  • On one selected section it is possible to check taper, by reading the diameter in two programmable positions: the difference between these readings is compared with the preset taper value
  • Nominal diameter and tolerance programming
  • Out-of-tolerance alarms (Go/NoGo) and delayed signals for part sorting (Reject/Rework)
  • Signal for “unidentified piece” to discard abnormal parts, if any
  • Library of parameters for 1000 different products, directly retrievable by the operator
  • Possibility of entering a password to restrict the programming functions to authorized personnel
  • Ethernet / Rs232 interface for remote programming or data retrieval
  • Multi-lingual menus (Italian, English, French and German)
  • Selectable measuring unit (mm or inches) and resolution
  • Pre-programmed factory set-up to facilitate installation and start-up of the system

The additional Process Regulation module (Option 1) features the following functions:

  • The automatic diameter regulation, achieved by adjusting the distance between the grinding wheels, is based upon the diameter shift read on one section only, as selected by the operator
  • PI (Proportional-Integral) mode, using INC (+) or DEC (-) pulse trains, whose number is proportional to the amount of the required correction
  • Regulation is started after having positively checked a real trend to drift from the nominal set point
  • Control parameters can be programmed and stored in the product library
  • Automatic backlash recovery, by adding extra pulses each time the correction is reversed
  • To avoid over-regulation, the control routine skips the already machined parts included between the gauge and the wheels
  • Additional input to hold regulation during diamond dressing of the grinding wheel

The additional Statistics module (Option 2)  offers the following functions:

  • Processing and printing of a statistical report for each selected batch or order
  • Computing and listing of max, min, avg, Cp and Cpk values of each measured parameter (all the diameters and taper)
  • Identification of the order, of nominal value, of tolerance range and counting of parts included in the selected batch
  • Statistics can include all the parts of the batch (good and rejected), or it can be restricted to the good parts only
  • All reports show the date and time
  • Motor shafts
  • Pistons
  • Hydraulic components
  • Plugs
  • Gudgeon pins
  • Additional software for grinder feed-back
  • Additional software for statistical reporting
  • Compressed air windows with filters and adjusting valve
  • Air blowing device for part cleaning
  • Belt conveyor to drive parts through the laser gauge
  • Extension cables
  • Gauge Calibration Report
For further information or enquiries Give us a call or fill in our online enquiry form
+44 (0)1823 333343