Differences

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

--- sherline_training_sop [2022/10/03 20:22] – [CNC Setup] furst
+++ sherline_training_sop [2022/10/05 22:16] – furst
@@ Line 56: / Line 56: @@
     * Sample prep
     * CNC Setup
+    * G-code Modification
     * Drilling
     * Printer Maintenance
@@ Line 62: / Line 63: @@
       * Cleaning
   * Remember to enter job information into the 3D print job log!
+{{:tools:sherlinecncmill:img_2876.jpg?400|}}
 ====Safety====
@@ Line 88: / Line 90: @@
 ====CNC Setup====
-  - Turn on the Flashcut CNC box
+{{:tools:sherlinecncmill:img_2879.jpg?400|}}
+  - Turn on the Flashcut CNC box
   - On the Sherline computer, start FlashCut CNC (thunderbolt icon)
   - Within FlashCut, select the home tab, followed by seek home. This will move all axis to their zero position.
@@ Line 105: / Line 108: @@
   - clamp the bonded sample into the top left corner of the fixture
-  - Without changing the coordinates, swap the edge finder for the selected abbrasive drill bit
+  - Without changing the coordinates, swap the edge finder for the selected abrasive drill bit that you intend to drill with
   - Using the jog commands, position the spindle over a sacrificial portion of the sample
   - slowly ramp the spindle speed up to full speed and apply diluted Kool Mist coolant over the sample and within the fixture.
-  - using incremental jog, slowly lower the drill until a the coolant over the sample turns cloudy due to glass dust
+  - using incremental jog on slow speed, slowly bring down the bit until it enters the fluid and just touches the surface of the wafer. a small plume of glass dust will be seen when the rotating bit contacts the wafer or glass surface.
-  - zero the program Z axi.
+  - zero the program Z axis.
   - raise the spindle using the jog function and turn off the spindle.
-**the machine is now zeroed in X, Y, Z**
+**The machine is now zeroed in X, Y, Z**
-====Rates====
-F270:
+====G-code modification====
-{|
+The sample G-code is as follows:\\
-|-
-! Material || $/Spool || cu in/Spool || $/cu in || $/cc
-|-
-PLA || 79 || 60 || 1.31 ||.08
-|-
-ABS || 164 || 60 || 2.73 || .17
-|-
-Sup || 228 || 60 || 3.79 || .23
-|}
-F270 hourly charge: $1/hr to pay for head replacement
-Ultimaker:
+G21 (select mm units)
-ABS: .12/gram
+G49 G80 G90 (cancel offsets, cancel cycles, absolute coordinates)
------
+G98 (Move the drill away from the part when drilling is finished)
-=====F270 Quick Review=====
-Tool Lead: Andrew Furst \\
-Contact: Andrewfurst@ucsb.edu
-====Safety Concerns====
-  * Both print heads and bed are heated during operation. Do not attempt to clean, remove, or adjust without allowing for adequate cool down time.
-  * Keep hands clear of printer during operation. Pause print before clearing or adjusting part.
- ====Safe Operating Procedures Review====
+G00 X0 Y0 Z5 (rapid move to the upper left corner of slide, 5mm above)
-    - On the F270 printers computer, launch GrabCad Print
-  - Select File -> New Project -> Add Models -> Import desired models
-  - Move models around on virtual build tray so that models on a used build tray do not overlap any previously printed spots
-  - the purge block and printed model should be placed close together to minimize print time
-  - Select "Print Settings" from the menu on the right hand side
-  - From menu, select desired slice height, and verify that the first layer material is set to support.
-  - Open and place build tray into F270, making sure that the tray is locked in place by pulling up on the front locking arm until arm is PARALLEL to build tray.
-  - Select print, and send the job to the F270 3D printer
-  - on the F270 touch screen, select your job, and then select print.
-====Post Processing====
+(Hole drilling blocks)
-  * If support was constructed from dissoluble filament clean using the F270 Support Removal Apparatus which is filled with heated caustic chemicals. GLOVES, LAB COAT, AND FACE SHIELD MUST BE WORN
-  * Build tray should be scraped clean and free of any support or build material then placed in the USED F270 tray drawer if printable space is left. Any material protruding from the build tray will damage print heads during the next print.
-====Maintenance Schedule (see user maintenance page 80):====
+(G73=canned peck drilling cycle 1)
-  * Clean oven chamber weekly
+G73 X17 Y-12.5 z-1.2 Q.1 R0.5 F2.5 (x=coordinate of hole, y=coordinate of hole, Z=depth of hole, R=retract value, Q=depth of each peck, F=feedrate)
-  * Clean platen weekly
-  * Inspect, wipe, and clean tip wipe assemblies monthly
+(G73=canned peck drilling cycle 2)
-  * Clean exterior of printer as needed
+G73 X58 Y-12.5 z-1.2 Q.1 R0.5 F2 (x=coordinate of hole, y=coordinate of hole, Z=depth of hole, R=retract value, Q=depth of each peck, F=feedrate)
-  * Clean touchscreen as needed
+(Closing block)
+M30
+When using G73 canned cycle, X and Y set the coordinates of the hole, and Z sets the maximum depth below machine zero. R sets the starting height of the drilling cycle as well as the retract height between pecks)
+(Q sets the depth each peck will go into the workpiece until it excedes the Z value set above. F sets the feedrate or the rate at which the drill will decend into the workpiece)
+(If you are cracking the slide or getting excessive break out you should reduce the feedrate value and the depth of each peck.
+The Z value should be slightly deeper than the thickness of the sample without backing plate. This insures all holes drilled in the sample are through holes. NEVER drill without a backing plate as you will hit the fixture.
+====Drilling====
+  - load the program within FlashCut by selecting file in the upper right hand corner, followed by open G-code
+    - the file should be visible in the bottom left hand corner of the FlashCut GUI. ensure all values are correct before continuing
+  - cover the slide and the fixture with coolant; the drill will be ruined if it runs dry
+  - ramp up the spindle to max speed
+  - select the start button to run the G-code
+  - as the machine drills, flush the cut continuously with coolant to wash away glass particles and chips
+  - use the vacuum line to soak up any extra coolant during the run
+====Rates====
+  * hourly billing for lab use applies
+  * No additional charges result from tool time
+  * Used drill bits are free
+  * If a new dill bit is selected, ensure it is logged within FBS so recharge can be applied {{:tools:sherlinecncmill:img_2873.jpg?400|}}
 -----