Differences

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--- formech_1372:formech_1372 [2023/03/13 03:37] – [PS 1.5mm] formlab
+++ formech_1372:formech_1372 [2025/01/13 02:13] (current) – [Plastic sheet sizes] formlab
@@ Line 12: / Line 12: @@
   * Large: ''1370 x 660mm''
+[[https://www.formlab.schoolofarts.be/pricing|What does it cost?]]
 === Pre-drying ===
   * PMMA: 70°C 4 hours
@@ Line 37: / Line 39: @@
 ==== Tested mould materials include: ====
   * **Plaster**
-    * <color orange>**!**</color> Varnish the surface
+    * <color orange>**!**</color> Apply primer first and then varnish the surface
   * **Wood**
     * <color orange>**!**</color> Vacuum or varnish the surface
@@ Line 50: / Line 52: @@
   * **3D printed parts**
     * <color red>**-**</color> Limited runs
+    * Plastic deforms: infill becomes visible if not enough top layers or walls.
   * ...
@@ Line 58: / Line 61: @@
 Transparent, glossy surface.
-^ Thickness ^ Size ^ Cost (per sheet) ^
+^ Thickness ^ Size ^
-| 1mm | Large - 1370 x 660mm | €13,00 |
+| 1mm | Large - 1370 x 660mm |
-| 1mm | Small - 500 x 500mm | €3,90 |
+| 2mm | Large - 1370 x 660mm |
-| 2mm | Small - 500 x 500mm | €6,63 |
+| 1mm | Small - 500 x 500mm |
-| 3mm | Small - 500 x 500mm | €9,62 |
+| 2mm | Small - 500 x 500mm |
+| 3mm | Small - 500 x 500mm |
 ----
@@ Line 72: / Line 76: @@
 PMMA is also known as Acryl. It has a glossy surface.
-^ Color      ^ Light      ^ Thickness          ^ Size         ^ Cost (per sheet)       ^
+^ Color      ^ Light      ^ Thickness          ^ Size         ^
-| White | translucent | 3mm | large - 1370 x 660mm | €36,40 |
+| White | translucent | 3mm | large - 1370 x 660mm |
-| White | translucent | 3mm | small - 500 x 500mm | €10,40 |
+| White | translucent | 3mm | small - 500 x 500mm |
-| Green | transparent | 3mm | small - 500 x 500mm | €15,60 |
+| Green | transparent | 3mm | small - 500 x 500mm |
-| Light blue | translucent | 3mm | large - 1370 x 660mm | €54,60 |
+| Light blue | translucent | 3mm | large - 1370 x 660mm |
-| Light blue | translucent | 3mm | small - 500 x 500mm | €15,60 |
+| Light blue | translucent | 3mm | small - 500 x 500mm |
-| Dark blue | transparent | 3mm | large - 1370 x 660mm | €54,60 |
+| Dark blue | transparent | 3mm | large - 1370 x 660mm |
-| Dark blue | transparent | 3mm | small - 500 x 500mm | €15,60 |
+| Dark blue | transparent | 3mm | small - 500 x 500mm |
-| Yellow | transparent | 3mm | small - 500 x 500mm | €15,60 |
+| Yellow | transparent | 3mm | small - 500 x 500mm |
-| Cream | transparent | 3mm | large - 1370 x 660mm | €54,60 |
+| Cream | transparent | 3mm | large - 1370 x 660mm |
-| Cream | transparent | 3mm | small - 500 x 500mm | €15,60 |
+| Cream | transparent | 3mm | small - 500 x 500mm |
 ----
@@ Line 92: / Line 96: @@
 Uncut sheets. These can be used for the large and small forming area.
-^ Color      ^ Surface finish       ^ Thickness          ^ Size         ^ Cost (per sheet)       ^
+^ Color      ^ Surface finish       ^ Thickness          ^ Size         ^
-| white | matte / glossy | 1mm | 2000X1200 | €18,20 |
+| white | matte / glossy | 1mm | 2000X1200 |
-| white | matte / glossy | 1,5mm | 2000X1200 | €26,80 |
+| white | matte / glossy | 1,5mm | 2000X1200 |
-| white | matte / matte | 4mm | 2000X1000 | €45,30|
+| white | matte / matte | 4mm | 2000X1000 |
-| black | matte / matte | 1mm | 2000X1200 | €20,50 |
+| black | matte / matte | 1mm | 2000X1200 |
-| black | matte / glossy | 1,5mm | 2000X1200 | €32,70 |
+| black | matte / glossy | 1,5mm | 2000X1200 |
-| red | matte / matte | 1mm | 2000X1200 | €20,50 |
+| red | matte / matte | 1mm | 2000X1200 |
-| red | matte / glossy | 1,5mm | 2000X1200 | €32,70 |
+| red | matte / glossy | 1,5mm | 2000X1200 |
-| green | matte / matte | 1,5mm | 2000X1200 | €31,60 |
+| green | matte / matte | 1,5mm | 2000X1200 |
-| blue | matte / glossy | 1,5mm | 2000X1200 | €32,70 |
-=== How much does it cost? ===
-  startup cost + ( plastic sheet cost * plastic sheet count * material multiplier )
-  +
-  ( machine time (minutes) * machine time cost )
-  * startup cost: €2: only when vacuum form machine is used
-  * plastic sheet cost: cost sheet, including VAT and transportation
-  * material multiplier: 30%: item cost * 1,3
-  * machine time cost: €5 per hour (€0,08333333 per minute)
@@ Line 186: / Line 179: @@
   * **Bubble moulding**: The table should be lowered. If it's in the up-position, the air can't pass the seals.
+===== Drying sheets with the oven =====
+Use one of the ceramics oven in the metal atelier.\\
+The control cabinet is behind the oven. \\
+{{:formech_1372:oven_metal_atelier_01.jpg?400|}}\\
+Get the key from Peter to be able to power on the oven.\\
+To turn on the oven, insert the key and turn it to the right. Then turn the red knob to the right.\\
+==== Control panel ====
+{{:formech_1372:oven_metal_atelier_02_control_panel.jpg|}}
+  * There are 9 programs
+  * Each program can have multiple segments
+    * Example: segment 1: warm up to 70° in 30 min, segment 2: keep that temperature for 4 hours
+  * Each segment has 2 values: a temperature, and a time
+  - Press 'program' until it goes to program 5
+    - Nothing is on here yet. (This might change in the future)
+    - Press until there's an empty preset
+    - In the future there might be a paper with an explanation of what programs do what. I could have a fixed entry on the list
+  - Segment 1' is blinking. Use the up-down arrows to set a target temperature
+  - Press the --> arrow to go to the time value
+  - Set the time with the up-down arrows
+  - When ready, press the stop / start button to start the oven
+==== Suggested program ====
+  * Segment 1: temp: 70° time: 30 min
+  * Segment 2: temp: 70° time: 4 hours
+  * Segment 3: temp: 0° time: 30 min
 ===== Clamping tips for high gauge sheets =====
   * Apply 80 grit strips of sand paper to the underside of the clamp frame to provide more grip on the sheet. The strips can be held in place with a good quality double sided tape, contact adhesive or preferably a silicone adhesive to take the heat.
@@ Line 196: / Line 224: @@
 ===== Machine presets =====
-==== PS 1mm ====
+==== PS ====
-Power: 70%
+  * 1mm (Experimental v2)
-Heating: 45 seconds
+    * Power: 70%
+    * Heating: 45 seconds
+  * 2.5mm (Experimental v2)
+    * Power: 70%
+    * Heating: 85 seconds
-Experimental v2
+==== PETG ====
-==== PS 1.5mm ====
+  * 2mm (OK)
-Power: 70%
+    * Power: 70%
-Heating: 85 seconds
+    * Heating: 70 seconds
-Experimental v2
+==== PMMA ====
-==== PMMA 3mm ====
+  * 3mm
-  * pre-dry: 4 hours at 70°C (between 70-80°C): no blisters
+    * pre-dry: 4 hours at 70°C (between 70-80°C): no blisters
-  * If using the window: add shims: 3 on each side.
+    * If using the window: add shims: 3 on each side.
-  * heater 70% (and 75% at the edges)
+    * heater 70% (and 75% at the edges)
-  * 125 sec heating
+    * 125 sec heating
-    * (without peeking in between)
+      * (without peeking in between)
-    * This results in ±168°C: nice and flexible.
+      * This results in ±168°C: nice and flexible.
-    * Sheet forming temperature: 150 - 175°C. At 150°C, the sheet is not very flexible yet
+      * Sheet forming temperature: 150 - 175°C. At 150°C, the sheet is not very flexible yet
-  * 60 sec cooling
+    * 60 sec cooling
-==== Medium Gauge Film (0,15mm) ====
+==== Medium Gauge Film ====
-  * profile: 1mm PET (heater 85%)
+  * 0,15mm
-  * heating: 8 seconds
+    * profile: 1mm PET (heater 85%)
-  * vacuum: manual operation: start-stop technique to avoid holes if there are large cavities
+    * heating: 8 seconds
+    * vacuum: manual operation: start-stop technique to avoid holes if there are large cavities
+  * Polypropylene sheet: 1mm
+    * No profile saved
+    * Heaters at 50%
+    * Heating: ±70 sec. Ready when sheet starts pulling flat. Might be ready much earlier too, but these values are the ones we used for testing. The plastic is very stretchy and blew holes in tiny cavities. So maybe better less heat.
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