Search:

A lack of support would be a problem.

Wally

Storen, thanks for the reply. Are the flatbed laser machines adjustable in the Z axis? I saw a retrofit kit to make Z axis adjustable and now i am not sure if all or most flatbeds have no ability...

Good idea, i looked them up, the biggest laser they make is 8W and is not intended for steel.

If anyone knows of higher power lased diodes let me know.

This write up says "Q-Switched Fiber...

I have looked over this forum and have found the following laser engravers recommended.

LightObject (Sacramento CA)
Automation Tech (Chicago)
Rabbit Laser USA in (Ohio)

And possibly...

This thread seems to cover it.

https://www.machsupport.com/forum/index.php?topic=2385.0

Mariss, I am not understanding something here. If the motor drive will see 2.25A at 50vdc then it will see more current at the minimum advertised voltage the G540 can run at, 18vdc. Shouldn’t the...

If the drives had staggered startup then you would loose coordinated motion.

Switching power supply’s do not have enough capacitor on the output for return energy dump, so you have to isolate the output of the power supply with a diode and add a capacitor bank. If you do not...

Day1118, your math is correct for 4 drives at 3.5 amps = 14 amps and .67 of that = 9.38 amps max required to fully power a Gecko G540. Also your choice of 48vdc is a good one for maximum speed from...

Have you actually tried their PCB service. If so, do you know how much the shipping is to the USA.

That is another incredible deal. The lowest price i can find on those is about $42 each. They are good for 8A and have plenty of uF. One of those on each power supply will serve you well.

Well like Al said you could unwind some of the secondary wire and reduce the voltage. I never tried it before but if it comes to it we could risk one transformer giving it a try. You are lucky that...

How many of these transformers do you have. From the ad on Ebay it looks like he sells them in lots of 8.

OH boy, good catch Al, you are right. We would have fried the transformers and probably the bridges. Thank you for looking this over.

We can not run two floating supplies that will never work. ...

Your schematic looks OK, i assume that the green is DC- and red is DC+. You just have to connect you 2 green wires from the bridges together or you will have a “floating” power supply’s. Best case...

It looks like you will just squeak by with your transformer current rating. As close as can be calculated your bottom two transformers will have to supply 15.6 amps AC to the bridge to run all 3...

I am fairly certain the metal case on the heat sink is isolated but it would be easy to check with an ohm meter. Set the meter to 1x or 10 ohms and connect one lead to the case and probe all 4 of...

Drools said:
“In my current setup I have 2 of the 430-9001 transformers in series running the G540 with 3 nema23 steppers, XY-axis are using CNCRP [email protected] amd stepper and the Z-axis uses a...

Good catch, it is 12.6mA

We could also check to see if your transformer has enough capacity. Do you have the specs for it.

Now to figure out if your cap values are OK.

The Gecko capacitor formula is
(80,000 x I in amps) / V in volts = C in uF

You have a 6 amp motor. Gecko tells us that you only draw 2/3 motor...

From the cap spec sheet.

Leakage current I=0.02CV or 3mA, whichever is smaller.
C = 10,000uF
V = 63V
I is in micro amps.

.02 x 10,000uF x 63V = 12,600uA

12,600uA = .012600 A = 1.26mA

Lordthrash,

The value of the bridgeport depends a lot on what your area is like. Some areas had a large industrial base and old boss machines go for under a grand. Other areas have slim...

I will give you a hand calculating the resistors. To start we need the spec sheet of the 10,000 uf caps. What is the full part number of the cap and mfg.

The short version is we need to pick...

Originally Posted by cnc_4_me View Post

“Here are a few additional things i would like to see on your Todo list.
lead screw error mapping/compensation.”

Originally Posted by cnc_4_me...

The easiest thing to do is follow the signal through with a logic probe.

This is a very nice project. Here are a few additional things i would like to see on your Todo list.

lead screw error mapping/compensation.
At least one more full axis, 4 axis typically required...

OK, web site working now. But anything that has to do with price is in chinese.

cnc4me

The website does not come up for me.

cnc4me

LazyCam sounds like the way to go. The only thing i need to figure out now is how to make the Z axis work. The Z is a solenoid that is on or off, up or down. I have looked in the mach3 manual and...