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Machinists playground

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alanbeswick47

BRISBANE users

Hi

is there anyone in or near Brisbane with a Metal Storm that I can have a look at? I can come any time of day that suits

cheers

Alan

63 Views
jasshrie

15W laser issues - how to troubleshoot?

The 15W laser that I added on to my CNC kit abruptly stopped working mid job.


Can anyone recommend how to troubleshoot the laser and its signal? Or are these disposable?


I've been using it for engraving my logo onto some products, and over the course of use (6 months) the power did seem to get weaker and weaker and I started running the jobs slower and slower, and it would now only engrave on darker surfaces.


Now the laser does not engrave at all, and the small focal dot has disappeared.


Thanks for any tips/recommendations. Does anyone know the approximate lifespan one will get from these lasers?

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CNC3D
CNC3D
4월 30일

This can happen from time to time. Bring it in for us to look at :)

lostcar

CNC Plasma Cutter purchase

Hi, Not sure if this is the right place to post this, but does anyone know the most affordable build it yourself Plasma cutter table kit on the market in Australia? Thanks!

261 Views
CNC3D
CNC3D
4월 30일

Hi lostcar, We are working on a plasma table solution at the moment. Stay tuned on our Facebook and site feeds. :)

jasshrie

CNC3D CNC Bits, feeds and speeds

Hi guys- Just wondering if anyone can recommend feeds and speeds for some of the typical bits for cutting various types of wood (soft ply, structural ply, and hardwoods).


I'm running the 1.5kW Spindle with a screw drive machine.

The bits I'm using are:

  1. 6mm 2 Flute Straight Cut Bit

  2. 6mm 2 Flute Compression

  3. 3.175mm 2 Flute Straight Bit

809 Views
Peter Schwarzel
Peter Schwarzel
4월 30일

Hi Jass & others - Hope you have sorted your F&S's its an old post but a common question. You will need to learn about chip load or feed/tooth. This is called Fz in tooling cataloges. The eqn is Feed/rpm/no of teeth and its the size of the "bite" that the machine takes each tooth. If we look at your 1600mm/min @20k with 2T this is a Fz=0.040mm which is a very small chip, dust really. This size chip is really a rub and is probably wearing out your tool faster then its cutting. You need a bigger chip. For plywood I aim at 0.2mm so thats 4000mm/min/10000rpm/2=0.2mm. I use 1F bits so 4000/20000/1=0.2mm bite size. Once you find the best chip size stick with it. The bigger the chip the better but its limited to the torque availbale at the spindle and the gullet clearance of the tool (plus the stiffness of your machine). A steady stream of chips out of the tool is ideal. Now DOC is a function of the force available at the tool. So twice the depth requires twice the force (or power of the spindle is another way to look at it) Once you get your Fz right stick to it as thats the parameter that you should control. Then go as deep as you can. Using deeper DOC means you get better life out of the tool as well. Have fun everyone Peter

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