Differences

This shows you the differences between two versions of the page.

--- millsop [2020/10/12 18:17] – furst
+++ millsop [2021/04/27 17:39] (current) – furst
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-Name
+Name (Last, First)
 !
 Group or Company
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-Signature
+Signature (First, Last)
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 |1
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 ====Overview:====
-  - PM-25MV Mill
+PM-25MV Mill
-    - A 3-axis mill with R8 spindle. Spindle speeds varies continuously from 50-2500 rpm.
+  - A 3-axis mill with R8 spindle. Spindle speeds varies continuously from 50-2500 rpm.
-    - Weight: 275 lbs
+  - Weight: 275 lbs
-    - Spindle motor: Brushless DC 750 W (1 HP)
+  - Spindle motor: Brushless DC 750 W (1 HP)
-    - Travel
+  - Travel
-      - X-axis: 20.5”
+    - X-axis: 20.5”
-      - Y-axis: 7”
+    - Y-axis: 7”
-      - Z-axis: 13”
+    - Z-axis: 13”
-    - Axis locks
+  - Axis locks
-    - Quill lock
+  - Quill lock
-    - 4” Vice
+  - 4” Vice
-      - Hold downs for vice
+    - Hold downs for vice
-      - Indicating vice
+    - Indicating vice
-    - DRO
+  - DRO
-      - One for table and headstock. A separate DRO for quill.
+    - One for table and headstock. A separate DRO for quill.
-      - Functions
+    - Functions
-        - zeroing
+      - Zeroing
-        - inputting coordinate
+      - Inputting coordinate
-        - metric/inch interchange
+      - Metric/inch interchange
-        - Absolute/incremental coordinates
+      - Absolute/incremental coordinates
-        - automatic half
+      - Automatic half
-        - calculator
+      - Calculator
-        - entering tool offset
+      - Entering tool offset
-====Safety====
-  * Untrained or unsupervised operators risk serious injury.
-  * Risk of metal splinters and burns from flying chips. Wear safety goggles, closed-toe shoes, long pants.
-  * Keep body parts clear of spindle and workpiece while machine is moving
-  * Take care when handling heavy objects
-  * Make sure the part and tool are secured before starting a machining operation
-  * Remove chuck keys and other tools before starting the machine
 ====Training====
+**Safety Hazards**
-**Safety**
   - This machine is designed for milling and drilling operations by experienced users familiar with metal-working hazards.
   - Wear ANSI-approved full-face or eye protection at all times when using the machine (everyday eyeglasses are not reliable protection against flying particles).
@@ Line 104: / Line 96: @@
   - Turn on Quill DRO by pressing power button
   - Once part and tool are secure, spindle may be turned on by pressing the green power button on the speed controller panel
-    - setting up a vice
+    - Setting up a vice
       - Install the T-bolts and align the vise by eye. With one of the clamp nuts snug, but not tight, tighten the other one just short of fully-tight (but tight enough so the vise won’t budge without a definite tap from a dead-blow mallet). \\ {{:tools:precisionsmillingmachine:indicating_a_vice.png?200|}}
       - Adjust the Y-axis to pre-load the indicator to mid range at the tightly-clamped side of the vise, then lock the Y-axis. Do not allow the spindle to rotate during this procedure.
@@ Line 114: / Line 106: @@
   - Install the R-8 device, then hand-thread the drawbar into it until the shoulder on the drawbar bottoms on the splined spindle, diagram above (on the machine this is concealed by the drawbar cap, Figure 3-2). Lock the spindle with the special C-wrench, page 5, while at the same fully tightening the drawbar with an 8 mm wrench.
 **Securing the part**
-  - vice
+  - Vice
     - Position part in vice. Vice maximum length is 4”. Use parallels if needed. Press firmly down on part to ensure it is properly seated.
     - Tighten vice
@@ Line 133: / Line 125: @@
     - For drilling operations, loosen knob (4), allowing the lever hub to rotate independently of sleeve (3).
       - In the drilling mode, coarse feed, the mill operates like a standard drill press with a 3-lever hub; lever action lowers or raises the quill in the usual way by rack and pinion. Return action is assisted by a compression spring within the quill and spindle assembly.
-    - fine downfeed
+    - For fine downfeed
       - For milling operations calling for precise, repeatable control of tool depth, tighten knob (4) to engage hub (1) with the internal taper on sleeve (3). Tighten the Z-axis locks, Figure 3-6.
   - Quill DRO indicates quill position
 **Using DRO**
-  - zeroing
+  - Seroing
     - Move the table to the desired position. Zero an axis by pressing X0, y0, or Z0.
   - inputting coordinate
@@ Line 144: / Line 136: @@
     - Enter the position using the keypad
     - Press ENT
-  - metric/inch interchange
+  - Metric/inch interchange
      - Press MM/INCH
   - Absolute/incremental coordinates
     - There are two sets of basic coordinates display, ABS (absolute) and INC (incremental) displays.
     - Toggle by pressing ABS/INC
-  - automatic half
+  - Automatic half function
      - Touch one side of the workpiece with the tool. Zero the axis.
      - Touch the tool to the other side of the workpiece.
      - Press X or Y, then press 1/2
-  - calculator
+  - Calculator
     - Calculations can be done once the calculator button is pressed.
   - Edgefinding
-     -  Load edge finder in the spindle.
+    - Load edge finder in the spindle.
-     - Turn RPM to 1300.
+    - Turn RPM to 1300.
-     - Lower the quill so that the edge finder probe can collide with the edge whose position you want to measure.
+    - Lower the quill so that the edge finder probe can collide with the edge whose position you want to measure.
-     - Move the table so that the probe touches the edge of the part, causing the probe to become offset with the shank. At this point, the edge has been found.
+    - Move the table so that the probe touches the edge of the part, causing the probe to become offset with the shank. At this point, the edge has been found.
-     - Raise the quill. Offset the table position by half the edge finder diameter. Zero the axis.
+    - Raise the quill. Offset the table position by half the edge finder diameter. Zero the axis.
   - Zeroing Z
     - Find a dowel pin (See Supplies). Lower the tool so it is slightly above the dowel pin
     - Slide the dowel pin under the tool, gradually lower the Z-axis until the dowel pin rubs the bottom of the tool but can still pass through underneath.
     - Remove the dowel pin. Raise the table by the diameter of the dowel pin.
-       - drilling
+  - Drilling
-         - Look up proper RPM for tool and material
+    - Look up proper RPM for tool and material
-         - locate XY position, use quill to downfeed
+    - locate XY position, use quill to downfeed
-         - center drill, then drill the hole
+    - Center drill followed by peck drilling the hole
-         - peck drilling
+    - Peck drilling
-           - periodically remove drill from hole to clear chips
+      - periodically remove drill from hole to clear chips
-       - milling
+  - Milling
-         - consult resources for tool RPM and feed speed.
+    - Consult resources for appropriate tool RPM and feed speed.
-         - fully retract the quill and lock it with the lever on the left of the headstock
+    - Fully retract the quill and lock it with the lever on the left of the headstock
-         -facing
+    -Facing
-         -Side cutting
+    -Side cutting
-       -tapping
+  -Tapping
-         - Do not turn the spindle motor on during tapping
+    - Do not turn the spindle motor on during tapping
-         - Place the tap guide in the spindle
+    - Place the tap guide in the spindle
-         - Position hole under the tap
+    - Position hole under the tap
-         - Apply tapping fluid
+    - Apply tapping fluid
-         - Turn the tap clockwise to cut threads. Periodically reverse tap direction to clear out chip build up.
+    - Turn the tap clockwise to cut threads. Periodically reverse tap direction to clear out chip build up.
 {{:tools:precisionsmillingmachine:st1r-l2q0wxizo1iu9bou0a.png?400|}}
@@ Line 214: / Line 206: @@
     * 3-In-One multi purpose oil
       * Used for drilling and milling
+-----
+====Mill SOP Quick Review====
+Tool Lead:    \\
+Contact: andrewfurst@ucsb.edu      \\
+====Safety Concern====
+  * Untrained or unsupervised operators risk serious injury.
+  * Risk of metal splinters and burns from flying chips. Wear safety goggles, closed-toe shoes, long pants.
+  * Keep body parts clear of spindle and workpiece while machine is moving
+  * Take care when handling heavy objects
+  * Make sure the part and tool are secured before starting a machining operation
+  * Remove chuck keys and other tools before starting the machine
+====Safe Operation Procedures Review====
+  -Install a collet or drill chuck
+    - Select the corresponding size tool holder for the diameter of the tool shank
+    - Align the key in the spindle with the key in the tool holder by spinning the tool holder while maintaining light upward pressure into the spindle
+      - If tool holder is a drill chuck tighten the drawbar with the wrench on the drawbar and large open ended wrench around the spindle flats
+      - If tool holder is a collet, turn the drawbar to retain the tool holder, install the tool shank into the collet, and then tighten the drawbar the remining distance using a wrench on the drawbar and the large open ended wrench on the spindle flats
+    - Be sure to remove all wrenches and drill chuck keys before powering on the machine
+  - Zeroing the machine
+    - Use an edge finder in the spindle at approximately 1000 RPM to set the part zero. Be sure to account for the radius of the edge finder and cutting tool you intend to be using
+    - With the tool in the spindle, Z zero can be set by rolling a dowel pin over the workpiece under the tip of the tool while slowly dialing down the Z axis until the dowel pin catches the tool. Be sure to account for the diameter of the dowel pin
+  - Milling and drilling
+    - Refer to the feeds and speeds chart and select the correct spindle RPM based on on tool diameter, tool material, and workpiece material.
+    - Use DRO to set the correct depth of feed for the tool and workpiece material
+    - Use the hand crank so take smooth consistent cuts, be sure to avoid sudden movements when moving the machine and take passes appropriate to the rigidity of the machine (not very ridged).
+====Post Processing====
+  - Deburr part using a file or deburring tool
+  - Vacuum the mill and table
+  - Remove tool and tool holder from machine
+  - Wipe the clamping surface of the vice with a towel
+====Maintenance====
+  * Periodically insure the vice is square to the table using a dial indicator and sweeping back and forth against the fixed jaw
+  * Periodically oil the machine to prevent corrosion, wear, and binding of axes
+  * After machine is moved or is crashed, insure head remains square to the table by securing a dial indicator in the spindle and indicating the table by rotating the spindle by hand. Indicator should show no consistent pattern