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Bridgeport J-Head Series User Manual

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Bridgeport J-Head Series I Mill Rebuild
Document Number:
BPJ1RBLD_002
Document Version:
2.0.01
Document Version Date:
January 31, 2011
Prepared By:
Hoffman Mechatronics
496 Albrough Blvd.
Colonial Beach, Va 22443
mike_hoffman@verizon.net

Table of Contents

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Bridgeport J-Head Series Specifications

General IconGeneral
Spindle TaperR8
TypeVertical Milling Machine
Table Size9" x 42"
Quill Travel5 in
Ram Travel12 in

Summary

Document Information and Mill Overview

Document Organization

Explains the structure and organization of the manual for clarity and problem-solving.

Disassembly and Reassembly Suggestions

Provides essential tips and warnings for safely taking apart and putting back together the mill components.

Motor and Drive Section

Motor Removal, Inspection, and Reassembly

Details the process for removing, inspecting, and reassembling the mill's motor.

J-Head Section

Quill and Spindle Removal

Covers the procedures for removing the quill and spindle assembly from the J-Head.

Turret Section

Ram Adapter Removal, Inspection, and Reassembly

Explains the removal, inspection, and reassembly of the Ram Adapter.

Table Section

Table X&Y-Axis Gib Removal, Inspection, and Reassembly

Details the removal, inspection, and reassembly of the table's X and Y axis gibs.

Saddle Section

Saddle Section Removal

Outlines the steps for removing the saddle from the mill's knee.

Knee Section

Knee Section Removal

Describes the procedure for removing the knee from the base pedestal.

Tramming the Mill

Bridgeport Method

Details the standard Bridgeport procedure for aligning the mill's axes.

Maintenance and Lubricants

Backlash Adjustment

Explains how to adjust backlash on the X-Axis feed nut for precision.

Troubleshooting and CNC Conversion

Quill Falls Down Troubleshooting

Addresses the issue of the quill falling down and the need to lock it.

CNC Conversion Phase 1: Ball Screws

Details the first phase of converting the mill to CNC by replacing lead screws with ball screws.

CNC Conversion Phases

Z Axis Implementation

Explains the implementation of the Z-axis drive system during the CNC conversion.

Software Packages for CNC

Discusses the software options used for controlling the CNC conversion.

Reference Documents and Websites

Helpful Websites

Lists helpful websites related to the Bridgeport mill and CNC conversion.

Appendix A: Custom Tooling

Clock Spring Spanner Drawing

Provides a drawing for a custom tool used to adjust the clockwork spring.

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