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- Keep the electrical and the water cooling parts at an distance to each other. In our setup the water pump and the water tubing are on the left side and all electrical components are on the right side. All parts are mounted on the rack tray, so in case some water leaks and collects at the bottom of the enclosure, it won't touch electrical parts
- The safety switch is in a small extra enclosure connected with rubber hose cable. This way the supply unit can be placed e.g. under a table but the safety switch next to the laser engraver
- Mains power connector is at the back, key switch, sockets for the connecting cables are at the front
- Make sure all metal sides of the enclosure are connected to PE
Water Cooling
- Note on the used radiator (Coolstream PE 360): When installing the threaded couplings on it, be gentle. It seems, that the metal is really really thin around there and if you thread the hose-coupling in to deep, you rip it apart.
BOM
| Qty | Part name | Manufacturer Part | Part Link | Comments |
|---|---|---|---|---|
| Electrical Components | ||||
| 1 | Power supply laser diode, 3.3V, 20A | Meanwell RSP-100-3.3 | In beta test system: Meanwell RSP-500-3.3 | |
| 1 | Power supply peltier elements, 15V, 21A | Meanwell RSP-320-15 | In beta test system: Meanwell RSP-500-15 | |
| 1 | DIN rail power supply, 5V, 2 A | MeanWell MDR-10-5 | ||
| 1 | DIN rail power supply, 12 V, 3 A | MeanWell MDR-40-12 | ||
| 1 | DIN rail power supply, 24 V, 1 A | POS Power MDIN20W24 | ||
| 1 | Emergency Switch | Georg Schlegel SIL_QRBUVOO | stex24 | |
| 1 | Key switch | RS PRO 188-1149 | RS Online | |
| 2 | Switch NO, for key switch | RS PRO 188-1170 | RS Online | |
| 1 | Plug, fuse, power switch 6 A, with filter | Schurter KMF 1.1161 | ||
| 1 | Fuse holder | Schurter KM 01SH-1 | ||
| 2 | Fuse 6A slow blow, 5x20mm | 5x20mm 6A TR | ||
| 1 | Quicklock chassis socket, size 20, 4 poles | LUM 0272-04 or Lutronic 2620 04 T22CB100 | second one needed at laser side | |
| 2 | Quicklock plug, size 20, 4 poles | LUM 0252-04 or Lutronic 2650 04 T12CB T | ||
| 1 | Quicklock chassis socket, size 16, 7 poles | LUM 0271-07 or Lutronic 2420 07 T18CB100 | second one needed at laser side | |
| 2 | Quicklock plug size16, 7 poles | LUM 0251-07 or Lutronic 2450 07 T09CB T | ||
| 1 | DIN Rail 35 x 7,5 mm | ca 30cm | ||
| 6 | Terminal block grey | Phoenix Contact PT 2,5-QUATTRO, 3209578 | ||
| 2 | Terminal block blue | Phoenix Contact PT 2,5-QUATTRO BU, 3209581 | ||
| 2 | Ground terminal block green/yellow | Phoenix Contact PT 2,5-QUATTRO-PE, 3209594 | ||
| 1 | Disconnect terminal block | Phoenix Contact PT 2,5-TG, 3210185 | ||
| 1 | Isolating Plug | Phoenix Contact P-DI, 3036783 | ||
| 4 | Plug-in bridge, 2 positions | Phoenix Contact FBS 2-5, 3030161 | ||
| 2 | Terminal block end cover | Phoenix Contact D-ST 2,5-QUATTRO, 3030514 | ||
| 3 | Fuse terminal block | Phoenix Contact ST 4-FSI/C, 3036372 | ||
| 1 | Fuse 2A, regular ATO (ISO 8820-3 type C) | KFZ Flachsicherung 19mm | ||
| 2 | Fuse 15A, regular ATO (ISO 8820-3 type C) | KFZ Flachsicherung 19mm | ||
| 2 | 5x1,5mm2 rubber flexible cable | H07RN-F 5G1,5, length 2 meters | 4m in total, one 2m piece for connecting the safety switch, the other one for the 3V connection to the laser. 4x1,5mm is enough, but 5x1,5mm is more common | |
| 1 | 7x0,75mm2 rubber flexible cable | length 2 meters | connecting unit supply and laser (voltages other than 3V) | |
| 1 | cable gland M20, nylon | |||
| Water Cooling Components | ||||
| 1 | PU tube 12x8 | SMC TU1208BU | ca 5m | |
| 1 | Radiator for 3x 120mm fans | Coolstream PE 360 | ||
| 3 | Fan120mm | Noctua NF-A12x25 | ||
| 1 | Pump+Reservoir | |||
| 4 | Stop fitting G1/4" | |||
| 2 | Fitting, bulkhead union 2x 12mm | SMC KQ2E12-00A | ||
| 4 | Fitting, male connector, R1/4", 12mm | SMC KQ2H12-02AS | ||
| Enclosure | ||||
| 1 | Server rack 19" 4HE | ARLI Soho 4U | ebay | |
| 1 | Rack tray | ebay | ||
| 1 | Laser cut sheet metal front | custom part, 2-3mm aluminum | github link | |
| 1 | Laser cut sheet metal back | custom part, 1mm stainless steel | github link | |
| 1 | Laser cut sheet metal revetment | custom part, 1mm stainless steel | github link |
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