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en:construction:hotte_a_flux_laminaire [2013/03/27 17:03] ph [Prototype 1 & 2] |
en:construction:hotte_a_flux_laminaire [2013/04/22 12:47] ph [Laminar flow hood] |
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- | <WRAP hide> | + | <WRAP hide> |
- | <WRAP info>The plans presented below have required many hours of work, and some expensive trials and errors. If you find they were useful for you, a [[https:// | + | ====== Laminar flow hood</ |
- | + | ||
- | Please note that like all the unreferenced information on this wiki, this content is __only__ available __under the terms of the license__ [[http:// | + | |
====== Prototype 1 & 2 ====== | ====== Prototype 1 & 2 ====== | ||
The first prototype met the expectations, | The first prototype met the expectations, | ||
- | < | + | < |
- | + | ||
- | <WRAP box 61% center> | + | |
- | <WRAP clear></ | + | |
+ | <WRAP centeralign> | ||
===== Improvements ===== | ===== Improvements ===== | ||
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**Assembly** | **Assembly** | ||
+ | * When possible, plan a 1/8" space between each parts to compensate for the width of the saw cut. | ||
+ | * (optional) Pre-assemble all pieces with a air nailer. | ||
+ | * To avoid cracking of the plywood, pre-drill the screw holes with a bit of a smaller diameter. | ||
+ | * Seal well all the internal parts of the hood by drawing a silicone seal. The junction between the two parts (filter and engine), and the periphery of the prefilters are sealed with packing tape, much easier to remove than silicone. Each pre-filter is individually sealed to the support. | ||
- | The plywood tends to crack. Before screwing, drill the screw holes with a bit that has a smaller diameter than the screw. Seal well all the internal parts of the hood by drawing a silicone seal. The junction between the two parts (filter and engine) is sealed with Tuck™ tape, much easier to remove than silicone. | + | < |
**Tools needed** | **Tools needed** | ||
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* Glue gun | * Glue gun | ||
* Soldering iron | * Soldering iron | ||
- | * Measuring tape, screwdriver, | + | * Measuring tape, screwdriver, locking pliers (4), square, pencil |
- | * (optional) Pliers, locking pliers (4), wire stripper, hot air gun | + | * (optional) Pliers, wire stripper, hot air gun, crimping tool, air nailer |
===== Magnetic stirrers ===== | ===== Magnetic stirrers ===== | ||
- | Commercial magnetic stirrers are large, expensive, and often stronger than necessary. To stir one to two liters, you can build one simply by sticking two hard drive magnets[(: | + | <WRAP column 250px>< |
- | * Start by picking | + | * Align SF to the center of DF and tighten with clamps. Screw the two pieces together and remove the clamps. As shown, align the two SFa on DF, place the clamps, screw them, then remove the clamps. SF, DF and SFa 1-2 are now linked in a single piece. |
+ | * Drill 1 1/2" holes through the thickness of SF and 5/8" holes through the thickness of DF+SFa+SFa. | ||
+ | * Add the legs SFb and SFc, then prepare the stirrers; | ||
+ | |||
+ | |||
+ | * Pick up the magnets from an old hard drive. You will probably need a special screwdriver (torx). Each magnet is mounted on a metal plate. To recover it, bend the plate in the opposite direction to the magnet. | ||
* Join two magnets together, then preheat the magnets and the coupler (with a hot air gun or a bain-marie...). Meanwhile, preheat a hot glue gun. | * Join two magnets together, then preheat the magnets and the coupler (with a hot air gun or a bain-marie...). Meanwhile, preheat a hot glue gun. | ||
* Put some glue on the coupler and attach it to the magnets, well centered. Leave to dry. | * Put some glue on the coupler and attach it to the magnets, well centered. Leave to dry. | ||
* Place the assembly on a motor, then secure the coupler by tightening the screw against the shaft. | * Place the assembly on a motor, then secure the coupler by tightening the screw against the shaft. | ||
+ | |||
+ | |||
+ | * Place the motors into the previously drilled holes. | ||
* Solder the wires to the poles of the motor, as shown in the [[en: | * Solder the wires to the poles of the motor, as shown in the [[en: | ||
- | * Drill SF (as shown below). | + | * In order to keep a space of 1/ |
- | * Align SF, DF and SFa with the holes, screw the pieces together and drill them (as shown) | + | * Place a piece of electrical |
- | * Place a piece of styrofoam | + | * Solder |
- | * Stick the magnets to the surface with some tape, turn the screwed sheets (SF + DF + SFa) upside down, pull the wires out between the two SFa, and secure | + | |
- | * Turn over the sheets, remove | + | |
+ | < | ||
===== Maintenance ===== | ===== Maintenance ===== | ||
**Cleaning** | **Cleaning** | ||
Before each use, the internal surfaces of the work area should be cleaned with 70% isopropyl alcohol. The " | Before each use, the internal surfaces of the work area should be cleaned with 70% isopropyl alcohol. The " | ||
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- | {{: | ||
**Lubrication** | **Lubrication** | ||
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The motor should be oiled once a year with a suitable lubricant. With a screwdriver, | The motor should be oiled once a year with a suitable lubricant. With a screwdriver, | ||
- | {{: | + | {{: |
====== Plans cuts ====== | ====== Plans cuts ====== | ||
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| **1** |Rear | **AF** | | **1** |Rear | **AF** | ||
| **1** |Stirrer | | **1** |Stirrer | ||
- | | **2** |Stirrer-a | + | | **2** |Stirrer-motors |
- | | **4** |Stirrer-b | + | | **6** |Stirrer-front stands |
+ | | **2** |Stirrer-rear stands | **SFc** | ||
</ | </ | ||
**Motor (M)** | **Motor (M)** | ||
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The three-position switch allow fan speed selection. It may be replaced by a two-position switch, set to the highest speed. | The three-position switch allow fan speed selection. It may be replaced by a two-position switch, set to the highest speed. | ||
+ | |||
+ | {{: | ||
====== Budget ====== | ====== Budget ====== | ||
Most parts are easily found in hardware stores. The electronics come from [[http:// | Most parts are easily found in hardware stores. The electronics come from [[http:// | ||
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|Fan (Fasco™ A1200 + bracket)| | |Fan (Fasco™ A1200 + bracket)| | ||
|HEPA Filter (18" | |HEPA Filter (18" | ||
- | |Pre-filters (9 ¾"x19 ¾" | + | |Pre-filters (9 ¾"x19 ¾" |
- | |3-positions switch (115V, 15A)| 1 | 6 | **6** | |Glass | + | |3-positions switch (115V, 15A)| 1 | 6 | **6** | |Glass |
- | |Power cord (115V, 15A)| 1 | 10 | **10** | + | |Power cord (115V, 15A)| 1 | 10 | **10** |
- | |AC plug (115V, 15A)[(: | + | |AC plug (115V, 15A)[(: |
- | |Plywood (quality select, 4' | + | |Plywood (quality select, 4' |
- | |Primer & epoxy paint (for 128ft²)| 1 | | + | |Primer |
|Handles| | |Handles| | ||
- | |Latches| | + | |Latches| |
- | |Screws | + | |Screws ¾” et 1 ½”| |
|Silicon| | |Silicon| | ||
- | |Tuck™ | + | |Packing |
- | |Paint brush, roller, tray & sleeve| | + | |Paint brush, roller, tray & sleeve| |
- | | | | ^ **973** | | | | ^ **99** | + | |Hooks| |
+ | | | | ^ **942** | ||
**Total: 1140** | **Total: 1140** | ||
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- | <tab> | ||
- | ---- | ||
- | <WRAP lo>Note: Most of the pictures of the electronic components shown in the budget section come from Ebay Canada.</ |