Difference between revisions of "Bridgeport Mill Induction Checklist"

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<table style="width:100%;border-collapse:collapse;font-size:2vmin;" cellpadding="6vmin">
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<h1>Induction Check Sheet</h1>
  
<tr>
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<h1>Bridgeport Milling Machine</h1>
<td style="font-weight:bold;text-align:center;border:1px solid black;" colspan=2>
 
Induction Check Sheet</td>
 
</tr>
 
 
 
<tr>
 
<td style="font-weight:bold;text-align:center;border:1px solid black;" colspan=2>
 
Bridgeport Milling Machine</td>
 
</tr>
 
 
 
<tr>
 
<td style="text-align:left;border:1px solid black;" colspan=2>
 
Inductee level of experience with similar machinery:</td></tr>
 
<tr><td style="font-weight:bold;text-align:center;border:1px solid black;" colspan=2>
 
&nbsp;</td>
 
</tr>
 
  
<tr>
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<h1>Inductee level of experience with similar machinery:</h1>
<td style="font-weight:bold;border:1px solid black;width:80%;">
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&nbsp;<br>
Safety</td>
 
<td style="font-weight:bold;border:1px solid black;">
 
Completed Tasks</td>
 
</tr>
 
  
<tr>
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<h1>Safety</h1>
<td style="border:1px solid black;">
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<ul style="list-style:none;">
<b>Personal Protective Equipment (PPE):</b><br>
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<li>&#10060; Do not wear baggy clothing.</li>
When working with the milling machine check you are dressed appropriately. Ensure that you:
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<li>&#9989; Take off any jewellery.</li>
<ul>
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<li>&#129405; Wear eye protection at all times.</li>
<li>Do not wear baggy clothing.</li>
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<li>&#9989; If you have long sleeves, roll them up.</li>
<li>Do not wear any jewellery.</li>
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<li>&#9989; Tie your hair back appropriately if it is long.</li>
<li>Tie your hair back appropriately if it is long.</li>
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<li>&#9989; Close the gearbox covers.</li>
<li>Wear eye protection at all times.</li>
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<li>&#10060; Don't reach around the tool while spinning.</li>
 +
<li>&#10060; Don't leave the chuck key in.</li>
 +
<li>&#10060; Don't leave the spanner on the draw bar.</li>
 +
<li>&#9989; Spin the spindle by hand to check it can rotate freely.</li>
 +
<li>&#128293; Swarf, your work, and the cutter can get hot.</li>
 
</ul>
 
</ul>
These all have the potential to get caught in the moving parts of the machine. The list is not exhaustive and it is on the operator to apply common sense.
 
</td>
 
<td style="font-weight:bold;border:1px solid black;"></td>
 
</tr>
 
  
<tr>
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<h1>Setup</h1>
<td style="border:1px solid black;">
 
<b>Surroundings and Setup</b><br>
 
Check that:
 
 
<ul>
 
<ul>
<li>The machine is set up how you expect. Check:
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<li>Check the machine is set up how you expect:
 
<ul>
 
<ul>
 
<li>The locks for all 3 axes.</li>
 
<li>The locks for all 3 axes.</li>
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<li>The floor area you are working in is clear of cables, obstacles and potential trip hazards.</li>
 
<li>The floor area you are working in is clear of cables, obstacles and potential trip hazards.</li>
 
<li>Ensure there are no obstacles in the travel envelope of the tables.</li>
 
<li>Ensure there are no obstacles in the travel envelope of the tables.</li>
<li>Wear eye protection at all times.</li>
 
 
</ul>
 
</ul>
 
These all have the potential to get caught in the moving parts of the machine. The list is not exhaustive and it is on the operator to apply common sense.
 
These all have the potential to get caught in the moving parts of the machine. The list is not exhaustive and it is on the operator to apply common sense.
</td>
 
<td style="font-weight:bold;border:1px solid black;"></td>
 
</tr>
 
  
<tr>
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<h1>Preventative Maintenance</h1>
<td style="border:1px solid black;">
 
<b>Preventative Maintenance</b><br>
 
 
Prior to using the machine please ensure to press the one shot oiler 3 times. It's on the left hand side of the machine, behind the table.
 
Prior to using the machine please ensure to press the one shot oiler 3 times. It's on the left hand side of the machine, behind the table.
</td>
 
<td style="font-weight:bold;border:1px solid black;"></td>
 
</tr>
 
  
<tr>
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<h1>Main Controls</h1>
<td style="border:1px solid black;">
 
<b>Main Controls</b><br>
 
 
<ul>
 
<ul>
 
<li>The primary power switch for the machine is a big red rotary switch on the box on the right side. Vertical is on, horizontal is off.</li>
 
<li>The primary power switch for the machine is a big red rotary switch on the box on the right side. Vertical is on, horizontal is off.</li>
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<li>Spindle speed is set by the 3 position pulley gearbox inside the spindle head.</li>
 
<li>Spindle speed is set by the 3 position pulley gearbox inside the spindle head.</li>
 
</ul>
 
</ul>
</td>
 
<td style="font-weight:bold;border:1px solid black;"></td>
 
</tr>
 
  
<tr>
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<h1>Moving the Bed</h1>
<td style="border:1px solid black;">
 
<b>Moving the Bed</b><br>
 
 
<ul>
 
<ul>
 
<li>As you face the machine:
 
<li>As you face the machine:
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<li>The X axis has an autofeed.</li>
 
<li>The X axis has an autofeed.</li>
 
</ul>
 
</ul>
<td style="font-weight:bold;border:1px solid black;"></td>
 
</tr>
 
  
<tr>
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<h1>Changing Spindle Speed</h1>
<td style="border:1px solid black;">
 
<b>Changing Spindle Speed</b><br>
 
 
<ul>
 
<ul>
 
<li>Consult the table on the front of the machine for your desired configuration.</li>
 
<li>Consult the table on the front of the machine for your desired configuration.</li>
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</tr>
 
</tr>
  
<tr>
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<h1>Changing Tool</h1>
<td style="border:1px solid black;">
 
<b>Changing Tool</b><br>
 
 
<ul>
 
<ul>
 
<li>Stop the spindle.</li>
 
<li>Stop the spindle.</li>
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<li>Power the spindle to verify the spindle rotates freely and the machine sounds normal.</li>
 
<li>Power the spindle to verify the spindle rotates freely and the machine sounds normal.</li>
 
</ul>
 
</ul>
<td style="font-weight:bold;border:1px solid black;"></td>
 
</tr>
 
  
<tr>
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<h1>Digital Read Out (DRO)</h1>
<td style="border:1px solid black;">
 
<b>Digital Read Out (DRO)</b><br>
 
 
<ul>
 
<ul>
 
<li>The DRO simplifies precision positioning your work relative to the tool.</li>
 
<li>The DRO simplifies precision positioning your work relative to the tool.</li>
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</li>
 
</li>
 
</ul>
 
</ul>
<td style="font-weight:bold;border:1px solid black;"></td>
 
</tr>
 
  
<tr>
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<h1>Rapid Feed</h1>
<td style="border:1px solid black;">
 
<b>Rapid Feed</b><br>
 
 
<ul>
 
<ul>
 
<li>Rapid feed can be used to jog the machine quickly, and to ensure a constant feed rate (amd therefore an even surface finish).</li>
 
<li>Rapid feed can be used to jog the machine quickly, and to ensure a constant feed rate (amd therefore an even surface finish).</li>
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</li>
 
</li>
 
</ul>
 
</ul>
<td style="font-weight:bold;border:1px solid black;"></td>
 
</tr>
 
  
<tr>
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<h1>Quill Feed</h1>
<td style="border:1px solid black;">
 
<b>Quill Feed</b><br>
 
 
<ul>
 
<ul>
 
<li>The quill feed allows the spindle to operated like a pillar drill.</li>
 
<li>The quill feed allows the spindle to operated like a pillar drill.</li>
<li>During normal machining, the quill feed should be locked using the rotary lever on the front of the machine head.<ul>
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<li>During normal machining, the quill feed should be locked using the rotary lever on the front of the machine head.</li>
 
<li>To operate the quill feed, disengage the quill feed lock.</li>
 
<li>To operate the quill feed, disengage the quill feed lock.</li>
 
<li><b>Make sure to lock the quill feed after you finish using it.</b></li>
 
<li><b>Make sure to lock the quill feed after you finish using it.</b></li>
 
<li>The quill feed has limit nuts that can be adjusted to get a repeatable drill depth.</li>
 
<li>The quill feed has limit nuts that can be adjusted to get a repeatable drill depth.</li>
 
</ul>
 
</ul>
<td style="font-weight:bold;border:1px solid black;"></td>
 
</tr>
 
  
<tr>
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<h1>Cleaning up</h1>
<td style="border:1px solid black;">
 
<b>Cleaning up</b><br>
 
 
<b>Please ensure you clean and tidy the machine after you finish working.</b><br>
 
<b>Please ensure you clean and tidy the machine after you finish working.</b><br>
 
Ensure that:
 
Ensure that:
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<li>The quill feed is retracted and locked.</li>
 
<li>The quill feed is retracted and locked.</li>
 
</ul>
 
</ul>
<td style="font-weight:bold;border:1px solid black;"></td>
 
</tr>
 
 
</table>
 

Revision as of 22:05, 12 August 2019

Induction Check Sheet

Bridgeport Milling Machine

Inductee level of experience with similar machinery:

 

Safety

  • ❌ Do not wear baggy clothing.
  • ✅ Take off any jewellery.
  • 🥽 Wear eye protection at all times.
  • ✅ If you have long sleeves, roll them up.
  • ✅ Tie your hair back appropriately if it is long.
  • ✅ Close the gearbox covers.
  • ❌ Don't reach around the tool while spinning.
  • ❌ Don't leave the chuck key in.
  • ❌ Don't leave the spanner on the draw bar.
  • ✅ Spin the spindle by hand to check it can rotate freely.
  • 🔥 Swarf, your work, and the cutter can get hot.

Setup

  • Check the machine is set up how you expect:
    • The locks for all 3 axes.
    • The quill feed is engaged/disengaged.
    • The spindle is set to turn in the direction you expect.
    • Your work is clamped securely.

    If you find it set up in a certain way don't assume it's safe.

  • The floor area you are working in is clear of cables, obstacles and potential trip hazards.
  • Ensure there are no obstacles in the travel envelope of the tables.

These all have the potential to get caught in the moving parts of the machine. The list is not exhaustive and it is on the operator to apply common sense.

Preventative Maintenance

Prior to using the machine please ensure to press the one shot oiler 3 times. It's on the left hand side of the machine, behind the table.

Main Controls

  • The primary power switch for the machine is a big red rotary switch on the box on the right side. Vertical is on, horizontal is off.
  • Facing the front there's a row of 4 switches. Up is on, down is off. Left to right, they control: Spindle ? ? ? I can't remember :)
  • The primary power switch for the machine is a big red rotary switch on the box on the right side. Vertical is on, horizontal is off.
  • Spindle direction is set by the switch on the top left of the machine. Left is clockwise, right is counterclickwise, middle is disengaged (looking down).
  • Spindle speed is set by the 3 position pulley gearbox inside the spindle head.

Moving the Bed

  • As you face the machine:
    • The X axis moves left and right.
    • The Y axis moves forwards and backwards.
    • The Z axis moves up and down.
  • Every axis has a lock. You may want to engage the locks to maximise accuracy, as machining forces (usually during heavy machining) can move the axes without user intervention.
  • The X and Y axes are connected to the DRO.
  • The X axis has an autofeed.

Changing Spindle Speed

  • Consult the table on the front of the machine for your desired configuration.
  • Stop the spindle.
  • Set the spindle motor to disengaged by turning the spindle direction switch to middle.
  • Loosen the belt tensioning lock.
  • Move (rotate) the spindle motor to loosen the belt.
  • Move the belt into the desired position.
  • Move (rotate) the motor to tighten the belt.
  • Tighten the belt tensioning lock.
  • Power the spindle, ideally without a tool to ensure it rotates freely and sounds normal.

Changing Tool

  • Stop the spindle.
  • Set the spindle motor to disengaged by turning the spindle direction switch to middle.
  • Using the spindle brake to lock the rotation of the spindle, use a spannner to undo the draw bolt until it is fully unscrewed. You will be able to feel it come free.
  • Using a wooden, plastic, copper or otherwise not hard hammer, gently tap the top of the draw bar to free the tool from the spindle. This will cause the collet (and tool) to fall out. Ensure to support or cushion it appropriately. Brittle tools e.g. carbide can crack from falling short distances onto metal surfaces.
  • Insert a new collet.
  • Tighten the new collet.
  • Set your desired spindle direction.
  • Power the spindle to verify the spindle rotates freely and the machine sounds normal.

Digital Read Out (DRO)

  • The DRO simplifies precision positioning your work relative to the tool.
  • A typical DRO workflow may look like:
    • Jog your tool very slowly until you hear it start to touch your work.
    • For the axis, set the DRO to minus half the tool diameter.
    • Repeat for all axes (so just 2 usually).
    • Jog X and Y to 0.
    • The center of your tool is positioned above the datum of the workpiece.
  • The DRO supports:
    • Metric and Imperial units.
    • Setting an axis to a arbitrary value.
    • Adding or subtracting arbitrary values to the current readout.
    • Polar coordinates.

Rapid Feed

  • Rapid feed can be used to jog the machine quickly, and to ensure a constant feed rate (amd therefore an even surface finish).
  • The controls are:
    • Power: Switch on the front panel. Up is on, down is off.
    • Speed: Rotary dial on the control panel on the right. Speed is logarithmic so don't just crank it to the max.
    • Direction: Left/middle/right lever on the right of the bed.

Quill Feed

  • The quill feed allows the spindle to operated like a pillar drill.
  • During normal machining, the quill feed should be locked using the rotary lever on the front of the machine head.
  • To operate the quill feed, disengage the quill feed lock.
  • Make sure to lock the quill feed after you finish using it.
  • The quill feed has limit nuts that can be adjusted to get a repeatable drill depth.

Cleaning up

Please ensure you clean and tidy the machine after you finish working.
Ensure that:

  • The main power is off.
  • All the switches on the front panel are off.
  • The bed is free of swarf and debris.
  • There is no tool in the spindle.
  • The autofeed is set to disengaged, i.e. in the middle position.
  • The spindle motor is disengaged via the middle position on the spindle direction switch.
  • The quill feed is retracted and locked.