Differences

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

--- millsop [2020/10/12 18:48] – 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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     - 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 followed by peck drilling 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 appropriate 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|}}
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       * Used for drilling and milling
+-----
+====Mill SOP Quick Review====
-====Safety====
+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.
@@ Line 216: / Line 218: @@
   * 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