Author Topic: Questions for Lasershark wiring  (Read 6966 times)

sontaya

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Questions for Lasershark wiring
« on: November 08, 2014, 12:34:01 PM »
Hi Jeff,

I have questions about Lasershark board. I am wiring Galvo Set (Power Supply, Mirrors, Steppers) and  150mW 405nm Laser. I use my part from prytech printer.

I can connect Channel X Gnd and Channel Y Gnd and ttl to usb to ramps board.

but i am not sure How to wiring Laser to Lasershark board. That you show from
http://macpod.net/electronics/lasershark/lasershark_usage.php

1. Lasershark have Channel A,B.C and  Interlock. with port that i should connect with?

2. in pryntech board used power 12v dc 2A. I am not sure Lasershark should have power to run Laser or not? or Just power from ttl to usb from ramps board.

regards
sontaya

Macpod

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Re: Questions for Lasershark wiring
« Reply #1 on: November 09, 2014, 12:18:03 AM »
Hi Sontaya,

Uh oh, you have very serious wiring problems! This absolutely will not work as is. If you applied power you will damage the lasershark and likely your computer too!

1. The Laser wiring is just plain wrong.
You appear to have obtained a laser which does not have modulation control. This laser is a very poor choice for 3d printing! Did this come as part of the pryntech kit?!

You need to obtain a laser module capable of TTL or analog modulation. TTL laser modules will be cheaper and should be fine for this application.

You will also need to obtain an appropriate power supply to power this laser module.

The lasershark does not provide power to the laser. It also does not act as a relay to toggle power directly to a laser diode (which appears to be how you are attempting to use it). The lasershark A, B, and C ports are used to output a signal used by the driver circuitry to set the power supplied to the laser diode.
Ports A and B are capable of outputting an analog output signal meaning they can tell a laser module driver to set the power to (off, 10% power, 20.1252% power,  .etc .. , on)
Port C is capable of outputting a TTL signal only thus it can only tell a laser module driver to set the power to on or off.

Which channel (A, B, or C) will be determined by what the Pryntech software expects. You will need to contact them in order to identify this.

When you obtain your new laser module capable of ttl modulation, please ensure that you are connecting the GND signal pin of this module to the GND pin of the laser output channel and the other signal pin to the output voltage port. Currently you are feeding 12V into GND!

2. The RAMPS board does not connect to the lasershark. You need a computer with at least two usb ports.
1. The RAMPS board should connect to USB port #1
2. The Lasershark board should connect to USB port #2


sontaya

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Re: Questions for Lasershark wiring
« Reply #2 on: November 10, 2014, 10:34:24 AM »
Thank a lot Jeff,

Lucky for me that i have questions before I put power to the board.

what about this Laser it's ok.  Laser with TTL modulation  12VDC 405nm 150mw.

http://www.ebay.com/itm/New-12VDC-405nm-150mw-Blue-Violet-Laser-Diode-Module-with-0-20KHz-TTL-modulation-/130955440710

if it's not too much trouble  would you mind explain me abit about type Laser?
it's will be knowledge for anyone who want to make 3dprinter with laser by lasershark board.
 
I see on alieexpress
http://www.aliexpress.com/w/wholesale-ttl-laser-diode-module.html
many type and power for laser which type that i can use with lasershark.
I don't know laser it's have many detail.

1.what difference about green, blue, red  laser or just color .or which color it's have affect with UV Cure Resin
2.abot nanometer (nm) I see many like 445 nm 658 nm 980 nm etc. what diference and which have affect with UV Cure Resin
3.and power about 150 mw 200 mw or 800 mw what difference  more mw it's mean more power that resin will cure faster or not.

Thank you a lot

sontaya


Macpod

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Re: Questions for Lasershark wiring
« Reply #3 on: November 10, 2014, 04:50:26 PM »
what about this Laser it's ok.  Laser with TTL modulation  12VDC 405nm 150mw.

http://www.ebay.com/itm/New-12VDC-405nm-150mw-Blue-Violet-Laser-Diode-Module-with-0-20KHz-TTL-modulation-/130955440710

This laser WILL work with the LaserShark. The GND signal pin should be connected to the GND pin of the A, B, or C port you elect to use and the other signal pin connected to the A, B, or C signal pin.

You will still need a power supply for this laser however so make sure you procure this too.



if it's not too much trouble  would you mind explain me abit about type Laser?
it's will be knowledge for anyone who want to make 3dprinter with laser by lasershark board.
 
I see on alieexpress
http://www.aliexpress.com/w/wholesale-ttl-laser-diode-module.html
many type and power for laser which type that i can use with lasershark.
I don't know laser it's have many detail.

1.what difference about green, blue, red  laser or just color .or which color it's have affect with UV Cure Resin
2.abot nanometer (nm) I see many like 445 nm 658 nm 980 nm etc. what diference and which have affect with UV Cure Resin
3.and power about 150 mw 200 mw or 800 mw what difference  more mw it's mean more power that resin will cure faster or not.

Thank you a lot

sontaya

1. There are many different types of resins that can can be cured with light. Each type of resin is reactive to a different band (or multiple bands) of light frequencies.

Before you purchase a laser, you should review the resin you intend to use in order to select the best laser frequency. UV cure resins need ultraviolet light to cure. This means a laser between 100nm-400nm must be used.

Lasers that emit light in the visible light spectrum ~400nm-780nm such as green lasers (532nm) would not be good candidates for UV curing purposes.



2. the nanometer rating is the wavelength of light the laser produces. For example 532nm = green light, 445nm = blue light, and 658 = red light. If you search google for "electromagnet spectrum" you can read more about what wavelengths are where.


3. The power will affect how fast the resin cures. You should review your resin to identify the amount of power needed. If you obtain a laser that is not powerful enough the resin won't cure fast enough and if you obtain too powerful of a laser it may unintentionally over-cure an area or cure it too fast.


You must be VERY CAREFUL when operating lasers more powerful than 5mW. These lasers WILL cause eye damage if used improperly! At 150mW if the laser beam or a reflection enters your eye even for an instant you can be blinded. As you approach higher power levels even looking at the laser beam as it is bounced off non reflective surfaces can cause eye damage!

The smart and responsible thing to do is to ensure your setup is placed in an enclosure that blocks the laser light (direct and indirect) from entering your eyesight. You should also own a pair of laser safety goggles which are appropriate for the laser wavelength you are operating. I cannot stress this enough!

What is also important to know is that some of these lasers (i.e. those with wavelengths in the UV or close to the UV spectrum) are either not visible or appear very dim to the human eye even if they are very powerful. Despite the laser beam appearing very dim or even invisible these lasers can still blind you!

If you are new to lasers I would strongly encourage you to read the following:
http://www.repairfaq.org/sam/lasersaf.htm
In addition I would encourage you to search for laser safety classes taught in your area or discuss this with professional laser operators near you. Never underestimate the cost of your eyes!
« Last Edit: November 10, 2014, 04:54:47 PM by Macpod »

sontaya

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Re: Questions for Lasershark wiring
« Reply #4 on: November 11, 2014, 10:51:17 AM »
Hi Jeff ,

It's very kind of you for reply me ,very good information of laser. I understand about Laser a lot of your explaination.

I will order Laser. May be show you again after i am wiring to the Lasershark board.

Thank you for your kindness.
sontaya