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== Printed Parts == | |||
* Follow guidelines from http://www.thingiverse.com/thing:11653 and print components. | |||
* In addition you need: | |||
* Finally we put ours in a hollowed out 2 drawer file cabinet - making a magnet safety lock on to two new doors. | |||
==Designs specs== | ==Designs specs== | ||
Revision as of 18:57, 6 August 2012
This page describes how to make an open source laser system for polymeric welding. For directions on how to use the one located in the MOST lab see: Laser welding protocol: MOST. Our primary interest in it is making expanded microchannel heat exchangers for all kinds of energy efficiency applications including solar water disinfenction.
Mechanical and Electrical Parts list
Misumi Parts
| Part Description | Part Number | Link |
|---|---|---|
| Precision Linear Shafts | PSFJ12-480 | http://us.misumi-ec.com/us/ItemDetail/10300000120.html |
| Linear Double Bushings with Pillow Blocks | LHSSW12 | http://us.misumi-ec.com/us/ItemDetail/10300028460.html |
| Linear Single Bushings with Pillow Blocks | LHSS12 | http://us.misumi-ec.com/us/ItemDetail/10300028370.html |
| Aluminum Extrusion Four-Side Slots | HFS5-2020-2000 | http://us.misumi-ec.com/us/ItemDetail/10302368740.html |
| Square Nuts for Aluminum Extrusions | HNKK5-5 | http://us.misumi-ec.com/us/ItemDetail/10302246940.html |
| Reversal Brackets with Tab | HBLFSN5 | http://us.misumi-ec.com/us/ItemDetail/10300437260.html |
| Cap Screws for Aluminum Extrusions | HCBST5-12 | http://us.misumi-ec.com/us/ItemDetail/10302261460.html |
| T-Shaped Shaft Supports | SHA1220 | http://us.misumi-ec.com/us/ItemDetail/10300013940.html |
Stockdrive
| Part Description | Part Number | Link |
|---|---|---|
| 18 Teeth Polycarbonate Timing Pulley | A 6T16M018DF6005 | https://sdp-si.com/eStore/PartDetail.asp?Opener=Group&PartID=42977&GroupID=347 |
| Fiberglass reinforced Neoprene Toothed Pulley Belt | A 6Z16MB89060 | https://sdp-si.com/eStore/PartDetail.asp?Opener=Group&PartID=70713&GroupID=342 |
Adafruit
| Part Description | Part Number | Link | Quantity |
|---|---|---|---|
| Stepper Motor | ID 324 | http://www..com/products/324 | |
| Audrino Uno( Motherboard) | ID 50 | http://www.adafruit.com/products/50 | |
| Adafruit Motor/Stepper/Servo Shield for Arduino kit - v1.0 | ID 81 | http://www.adafruit.com/products/81 | 2 |
Robot shop
| Part Description | Link | Quantity |
|---|---|---|
| Stepper motor driver | http://www.robotshop.com/productinfo.aspx?pc=RB-Pol-107&lang=en-US | 2 |
Markerbot
| Part Description | Link | Quantity |
|---|---|---|
| Opto Endstop v2.1 kit | http://store.makerbot.com/electronics/electronics-kits/optical-endstop-v2-1-kit.html | 2 |
Printed Parts
- Follow guidelines from http://www.thingiverse.com/thing:11653 and print components.
- In addition you need:
- Finally we put ours in a hollowed out 2 drawer file cabinet - making a magnet safety lock on to two new doors.
Designs specs
- The projected dimensions are to be 1.5 ft. by 1.5 ft.
- The laser welder is based upon a laser cutter system found here: http://www.thingiverse.com/thing:11653
How to put together
tables , pictures
Software
Safety
The Laser is composed by three main devices: LaserMount 264, TECSource 5300 and LaserSource 4320. The LaserMount 264 is a united that integrates a Peltier cooler for precise temperature control and the laser itself. TECSource 5300 is a temperature controller that needs to be attached with the LaserMount. LaserSource 4320 is a Laser Diode Driver, it controls the laser behavior such as Voltage, Current, PWM Duty Cycles and
On/Off control.
The instalation of the LaserSource and the TECSource are very straightforward. After unpacking the units, make sure all
packing materials have been removed and nothing obscures the ventilation ports on the side and front of the units.
Change The Voltage Selection to the appropriate value and make sure both devices are properly grounded.
The devices have vent holes on the side and front, do not block these vent holes, or overheating may occur, causing damage
to the unit.
Connect the cables from the TECSource and the LaserSource labeled LASER and TEC to the LaserMount properly.
To power up the unit, connect the AC power cord to the unit, turn the power switch, located on the front panel, to the on
(I) position. The unit will display the model, serial number, and firmware version, go through a quick power-up self-test,
and return to the last known operating state.
In order to achieve the highest level of accuracy, the TECSource should be powered on for at least one hour prior to taking
measurements.
Once devices are powered up, it is necessary to enable the External Fan Control on the TECSource menu options.
Make sure the temperature controller current limit is set to a maximum value of 7.4A.
General Basic Precautions:
The LSO shall be notified of the purchase of any laser, regardless of the class. Such notification should include the
classification, media, output power or pulse energy, wavelength, repetition rate (if applicable), special attachments
(frequency doublers...etc.), beam size at the laser aperture, beam divergence and users.
No attempt shall be made to place any shiny or glossy object into the laser beam other than that for which the equipment is
specifically designed.
Eye protection devices which are designed for protection against radiation from a specific laser system shall be used when
engineering controls are inadequate to eliminate the possibility of potentially hazardous eye exposure (i.e., whenever
levels of accessible emission exceed the appropriate MPE levels.) This generally applies only to Class IIIB and Class IV
lasers. All laser protective eyewear shall be clearly labeled with optical density values and wavelengths for which
protection is afforded.
Skin protection can best be achieved through engineering controls. If the potential exists for damaging skin exposure,
particularly for ultraviolet lasers (200-400 nm), then skin covers and or "sun screen" creams are recommended.
HANDS - Most gloves will provide some protection against laser radiation. Tightly woven fabrics and opaque gloves provide
the best protection.
ARMS - A laboratory jacket or coat can provide protection for the arms. For Class IV lasers, consideration should be given
to flame resistant materials.
Laser Power Requirements
| Material | Spot size (mm) | Laser power (W) |
|---|---|---|
| Polymer | 1 | 10 |
| Polymer | 0.3 | 1 |
| Polymer | 0.1 | 0.1 |
| Al | 1 | 1000 |
| Al | 0.3 | 100 |
| Al | 0.1 | 10 |
If the material is plastic wrap or aluminum foil thickness, the power required is about three times as much. So basically being able to focus the beam not only can give you smaller channels, but it also reduces the required laser power.
- Source for high transmitivity glass: SGG DIAMAN - Saint-Gobain Glass Vision Product Family -Extra clear low-iron glass