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Hi,
This is my older 80w laser cutter. It's 1200x900mm. I don't used it much anymore because I got a second new one. This one I keep as a backup.

I was recently thinking about getting a small...

Hi there,

I have been laser cutting and engraving acrylic parts and non-metals as a small business owner for 10 years. We do small signs and awards, displays, custom work. The business is fine but...

My machine has a 24x48" bed and I'm using 1/2"-8 (1 start) acme lead screws. My dual X axises are around 55'' long, and they can be easily flexed. With this set-up, I can hardly go over 90 ipm, this...

LOL

I had a similiar situation on mine. If you are using flexible couplings to attach the screws to the motors, you need to add some shaft collars on the inside of the gantry and the other axises so the...

Holy cow!! That 48V PS was the best imprvement I ever made to the machine! I did a couple of test runs, and absolutely no lost steps, and my god, the speed!! 100 ipm travel easily... Me happy!

I have 1/2-8 acme screws. Am I in trouble? I don't mind a bit slower speed, as long as it works..

Thanks for all the replies. The 48v power supply is already on the way! I suppose doubling the voltage will greatly improve the power of these babies.

If that doesn't cut it, I'll play with the...

Hello CNC aficionados

I'm working on the completion of a 24 x 48" CNC router, based on the Solsylva plans. Early on, I have decided to use 2 steppers for the X-axis (the 48" direction) instead of...

Nice suspenders!

:-)

Also check any slack between the leadscrew and the Z stepper. Maybe you have a loose shaft collar there. Try lifting your spindle by hand and you'll see.

Right now, I'm using 425oz.in (7.2v/3A) bipolar motors on X & Y. My Z axis is 170oz.in. My first setup was 170 oz.in on all axis but had a lot of stalling, but I was still using the TB6560. I...

I have built a 24x48" machine using 1/2-8 lead screws. All my speed/lost steps problems disppeared when I replaced the crappy TB6560 with a Gecko 540. I can do 45ipm without any problems. I have a...

Here's a screen grab. Much less pins are on.

(je suis à Bécancour, anciennement Montréal...:cheers:)

EUREKA!!!!!!!!!

Adding an "external" graphics card fixed the freezing!!

now the fun begins...

Try Part Kart - Collaborative Prototyping and Manufacturing, they have an online tool to generate G-code : Partkam. it's very convenient for simple shapes.

Hey Claude!

I uninstalled every software on the system except Mach3, including anti-virus and the firewall (it's not connected to internet). Cleaned up the startup sequence as well. So I did some...

Yes, I have used the Gecko xml file and double-checked the output values.

Meanwhile, I have decided to install Mach 3 on another older, dedicated PC. I have finally been able to get control of...

Here's how I would do it :

-I would first count how many diamonds per circumference you want.
-Divide the post circumference by the number of diamonds. You get the width of each diamond.
-Define...

Hi guys,

I'm trying to set-up a new Gecko G540 in Mach3. I'm able to jog in all directions, except Y where it only travels in +Y. When I look at the DIAGS screen, I can see that the pin 4 which...

Hello Jens,

What stepper driver board are you using ? I have a similar problem and am using a TB6560 all-in-one driver/breakout board bought from ebay.

Hello Al,

My red and orange are indeed connected together, sorry if I wasn't clear. Everything is wired like you describe on both ends.

What does the 50VA imply ? Does it mean this transformer...

The part is Digi-Key 237-1334-ND. Here's the link for the datasheet:

http://system.netsuite.com/core/media/media.nl?id=12599&c=ACCT126831&h=9bf90c20991f70f0e64c&_xt=.pdf

Note : I have 115VAC...

Red & Orange are tied together. So I have Red and Black going to the bridge rectifier.

Hello Al,
I have started unwinding the transformer. I have removed about 8 turns of the yellow wire in the secondary winding (see attached schematic). When I check voltage, it stays around 50V as if...

Thanks for the help. I'll probably attempt the procedure you describe and let you know.

Meanwhile, I was reading on another thread about the TB6560 Chinese controller, which I have, and I...

Then I should have selected a 25.4V transformer, ahh well... Would a resistor be a good way to drop the voltage before entering the controller board ?

I measured the voltage on the capacitor lugs, so the the voltage would be "flattened" at that point, no?

Hello all,

I have a little experience in electronics, but it's the first power supply I really build from scratch. I have put together a 36v power supply using the following components :
...