Differences

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

--- millsop [2020/10/12 18:51] – furst
+++ millsop [2021/04/27 17:39] (current) – furst
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+Name (Last, First)
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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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-====Form 2 Quick Review====
+====Mill SOP Quick Review====
 Tool Lead:    \\
 Contact: andrewfurst@ucsb.edu      \\
@@ Line 220: / Line 220: @@
 ====Safe Operation Procedures Review====
-  - Check resin cartridge and tank, make sure build material matches and is desired material.
+  -Install a collet or drill chuck
-  - If resin is not desired material, disconnect wiper at build tank, remove build plate by sliding towards front of fume hood. Remove cartridge, cap valve on bottom and close valve on top of cartridge. Replace build tank, wiper, and cartridge with desired material.
+    - Select the corresponding size tool holder for the diameter of the tool shank
-  - Launch Preform on Ultimaker computer
+    - 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
-  - Import desired STL
+      - 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
-  - Select "one click print" in the top left corner menu, change position, orientation, resolution and support as desired (note: that Preform will report on print ability of model, changing part rotation can affect print ability.
+      - 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
-  - Select print (orange button) from top left menu
+    - Be sure to remove all wrenches and drill chuck keys before powering on the machine
-  - Select desired printer
+  - Zeroing the machine
-  - Press button on Formlabs printer to start print
+    - 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====
-  - Excess resin should be removed from the build tray and part with IPA over a waste container.
+  - Deburr part using a file or deburring tool
-  - Place build tray and part in the Form Wash for 20 to 30 minuets (part can be placed individually within basket if necessary
+  - Vacuum the mill and table
-  - Allow 30 minuets for IPA to evaporate before placing part in Form Cure
+  - Remove tool and tool holder from machine
-  - Set Form Cure time and temperature based on resin type, place part within form cure, wait for time to elapse
+  - Wipe the clamping surface of the vice with a towel
 ====Maintenance====
-  * Switching resin types
+  * Periodically insure the vice is square to the table using a dial indicator and sweeping back and forth against the fixed jaw
-    * Close breather valve on resin cartridge
+  * Periodically oil the machine to prevent corrosion, wear, and binding of axes
-    * Resin cartridge by pulling straight up on the handle behind the form labs printers
+  * 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
-    * Cap the cartridge valve using the included orange tap and cap
-    * Remove the wiper by pulling straight out towards the front of the fume hood.
-    * Pull the resin tray out of the printer by pulling firmly straight out toward you
-    * Lift the wiper and resin tray out simultaneously, and carefully place on resin shelf within fume hood.
-    * Cover resin tray with black plastic cover and label
-    * Replace resin tray with clean or desired resin tank. Push tank and wiper firmly back toward the Form 2 until it clicks into place
-    * Replace resin cartridge and open valve