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Printed Circuit Board Drilling Machine with Linear Motor Spindle Positioning

IP.com Disclosure Number: IPCOM000108913D
Original Publication Date: 1992-Jul-01
Included in the Prior Art Database: 2005-Mar-23
Document File: 2 page(s) / 65K

Publishing Venue

IBM

Related People

Fink, OJ: AUTHOR [+4]

Abstract

Described is a printed circuit board (PCB) drilling machine which employs a servo-driven direct current linear motor to position drill spindles in the 'X' axis while the PCB is positioned in the 'Y' axis by servo-driven machine slide. Figs. 1 and 2 describe the various machine components: PC; 'Y'axis slide 2; machine base 3; drill spindle 4 (4x); drill spindle support rails 5; linear motor assembly 6; linear motor coil 7; and linear motor magnet (slide) 8. Drilling sequence is as follows: 'Y' axis moves PCB to desired 'Y' location; 'X' slides simultaneously to move spindles to desired 'X' locations; spindles drive downward drilling holes (each spindle may be programmed to drill or not drill at any location); repeat.

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Printed Circuit Board Drilling Machine with Linear Motor Spindle Positioning

       Described is a printed circuit board (PCB) drilling
machine which employs a servo-driven direct current linear motor to
position drill spindles in the 'X' axis while the PCB is positioned
in the 'Y' axis by servo-driven machine slide.  Figs. 1 and 2
describe the various machine components: PC; 'Y'axis slide 2; machine
base 3; drill spindle 4 (4x); drill spindle support rails 5; linear
motor assembly 6; linear motor coil 7; and linear motor magnet
(slide) 8.  Drilling sequence is as follows: 'Y' axis moves PCB to
desired 'Y' location; 'X' slides simultaneously to move spindles to
desired 'X' locations; spindles drive downward drilling holes (each
spindle may be programmed to drill or not drill at any location);
repeat.

      Alternate configurations:
      1)   Parallel linear motors for increased speed/power.
      2)   Support rails replaced with linear motor/slide assemblies
for simplified assembly, increased speed/power.

      Advantages of linear motor positioning are:
      1)   Fewer moving parts (no lead screws, couplings).
      2)   Increased speed as a result of reduced driven mass.
      3)   Increased drilling efficiency as result of ability to
employ more spindles per PCB.
      4)   Allows "Gridless Drilling" (see [*]).

      Reference
(*)  "Gridless Printed Circuit Board Drilling Machine," IBM Technical
Disclosur...