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Messages - ROSS

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1
T2 Engraving / Re: Laser power
« on: Today at 12:13:42 AM »
15w has been debated on forum.  It is probably overrun and the hours of ops may well be reduced from what they say anyway.....
Suggest stick with the 5500mW as a max and that might well be slightly over run (and it depends what you want to do with a laser anyway..Not much good having a powerful job if all you want to do is a bit of engraving and cutting card or thin stuff! :) 

Ralph (Administrator)  has cut 3mm ply with a 2.5w  for example...........)  Others have done some very good work with lasers under 5 watt.


2
T2 Engraving / Re: Laser power
« on: April 27, 2017, 11:29:56 PM »
Well the 7000mW is a non adjustable lens type for a start.

3
Projects / Re: Self Contained Control Box and Power Supply
« on: April 27, 2017, 11:25:36 PM »
Nice big control knobs not those irritating dinky small things that need a stylus to operate!!
Nice job.

4
Engraving / Re: Marking toast
« on: April 25, 2017, 05:55:10 AM »
Anyone thought of putting a nice graphic on toast?



prefer Marmalade on it.......tastes better.

5
Laser Safety / Re: Acrylic Orange Shields
« on: April 22, 2017, 11:43:45 PM »
For UK forum members  PERSPEX  would be the best bet. 
A sample can be bought quite cheaply from plastic suppliers so a test can be made before a firm decision is made..3mm is a reasonable thickness altho it also  goes to 5mm.

6
Trouble Shooting / Re: Laser randomly lowering power (OPEN)
« on: April 15, 2017, 12:20:30 AM »
I know, just odd how it works on some and not other parts.
Engraving a rock atm, seems ok.

Looks like prob solved...avoid shiny surfaces!
 :) :)

7
Trouble Shooting / Re: Laser randomly lowering power (OPEN)
« on: April 14, 2017, 10:57:17 PM »
Did not ZAX point out in a recent post that lasers do not like shiny surfaces..it reflects the light back....so that could be your problem.  Have you tried cutting a DULL material  (say thin ply of the proper type  or card.... to see if  the laser operates as it should??

8
Trouble Shooting / Re: Laser fan not working
« on: April 12, 2017, 06:33:26 AM »
If replacing the fan replace with a more powerful one to make for better laserhead cooling....same size are available....

9
General Discussion / Re: Ebay Laser
« on: April 09, 2017, 05:12:53 AM »
I just watched my first video on the laser cutters and see what you mean about build dangers, skip to 4:30 for one area to check st least.

https://youtu.be/KhhOHUe_b6o


Told ya! :)   

There is a written review  on Google as well about one of these machines and I was appalled at the shoddy way the thing was built.
Well worth reading.
http://www.electricstuff.co.uk/lasercutter.html


Note that their work area is smaller than some of  Eleks Makers

One day we will read that a newbie to lasers has been electrocuted by one of these pieces of junk.

10
General Discussion / Re: Ebay Laser
« on: April 08, 2017, 07:58:11 AM »

Thats a bit extreme, they pretty much all use off the shelf box frame supplys which are well tested and approved..
If it has an earth pin you are about as well protected as can be expected, most houses use an ELB.


Google is full of stories about the workmanship re wiring.  Its ok if you have the  modern  electricity supply quickblow sytem for your house   but I would still get the machine checked over.
 Not everyone has the quickblow system..certainly a lot of older properties do not.  So the tale is the same... BEWARE THE ELECTRICS.  There are some photos of the shocking (pardon the pun) wiring of some of these machines  on Google as well..
CHECK THIS BY RALPH (ADMIN)

 http://benboxlaser.us/index.php/topic,1672.0.html

11
Laser Accessories / Re: Compressor Air Assist
« on: April 08, 2017, 12:18:59 AM »
These lasers from China are a bit overstated on the power.  Ralph cuts ply of 3mm through -  on a 2.5w.  Have a word with him....
Proper LaserPly has a different glue to standard ply (the latter can stop a laser burnnig through). 
The trouble is there are outfits calling ply LASER when it is not correct Laser ply.  As the name implies..its usually for laserwork only.

12
General Discussion / Re: Ebay Laser
« on: April 08, 2017, 12:16:56 AM »
IF YOU BUY ONE  get a  qualified electrician to go over it BEFORE  switching it on.
 The Health and Safety rules in China are non existant.....

13
T2 Engraving / Re: Trail just a joke?
« on: April 08, 2017, 12:12:53 AM »
Sorry,  I never read manuals...


Says it all really.

14
General Discussion / Re: Are the green glasses from Chinese kits safe?
« on: April 05, 2017, 11:30:18 PM »
 I could not agree more with the comments in the post above by Stonemull.......
You really cannot trust anything the Chinese say...They are interested in selling..full stop.

Zax mentions glasses/colour  in an extensive thread on this forum and went into the nitty gritty.
I believe that one should use a colour glasses OPPOSITE  to the colour of the laser..i.e. ORANGE  for a blue laser.  HOWEVER  even expensive glasses may not prove effective  (depending where you buy them)......  It's a lottery with no real way of testing before buying..
 I suppose the best bet is..use the orange glasses and don't look at the work in progress..use an enclosure for the laser with a viewing aperture in the top - ORANGE  in  colour  - of proper  NM.

A cavalier attitude to these lasers is not recommended tho' one or two on this forum have shown such an attitude being new to lasers.  THEY ARE NOT A NEW TOY TO PLAY WITH.  One needs to read extensively on Google about these types of machines........

15
Trouble Shooting / Re: Cant draw concentric circles
« on: April 02, 2017, 03:09:13 AM »
Try the following for the starter to solving the problem.
Make sure the belts are not too slack or too tight. 
Make sure the frame IS  square.
Ensure both axis run freely.
(DONT PUSH (Check)  THE AXIS WITH THE STEPPER MOTORS CONNECTED TO THE BOARD.)

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