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Hi darry,
I had the same problem but intermitting laser, fires sometimes and doesn't fire in other times.
Have you resolved your problem?
Thanks

Hi everybody,
I have bought the lxj1390 chinese laser machine 80w and now i regret the instant when i bought it.
First, i have used the machine for about 10 minutes tests and the laser power supply...

Good day everybody,
I am working on laser cutting ornaments from acrylic . I have a lot of ornaments vector files and i want to laser cut them from acrylic , but they should be converted to sencils...

Hi everybody,
I made my cnc router machine and it works great . But when carving 2 1/2 D models it takes a lot of time as the x and y axis have to wait the z axis to finish its up and down...

hi again, here are attached the pcb and board pictures.

Hi, i ordered a new one but i am affraid of the possibility of that the cause that burned the old one is still there.
By the way when the fuse was blown the first time the machine mechanics keeped...

Hi again and really thx for your replies.
The part number is HY-DY10.
I will send some pictures of the blown 2sc2625 transistors.

thx ies for your reply,
i live outside US so sending the power supply to you will cost me more than a hundred USD for shipping:).
please may you tell me what might be the possible causes to check...

Hi everybody,
I bought a chinese laser machine lxj1390 and just while doing the first test cutting a 3mm of acrylic for two minutes i heard a pop and the laser stops emitting. I checked the laser...

Hi all,
I built the tachus unipolar driver board and it was working perfectly.
After abandoning it for a year and when i tried to reuse it the problem arised:
The only working axis is the Z axis,...

Thx dukerX for your reply,
When 3d roughing with no change in Z , the machine is fast enough and at the same determined feed rate, but when there is a change in Z it slows . it becomes clear that...

Dear all,
I have built my cnc wood router machine using rack and pinion mechanism for X and Y axis and ballscrew mechanism for z axis.
The machine is working perfect but i am looking for enhancing...

Thx james for your reply,
Now another problem has arised :)
The steppers mentioned above are Nanotec 4H5618C0408 and they are eight wires...

Dear all,
I have built the tachus42 driver board and it worked perfectly with small steppers.
I plan to use it on bigger steppers with different specifications. Two of the motors are identical and...

Hello everybody,
I have purchased the 2M656 stepper driver (http://www.jmc-motion.com/en/product/show.php?id=16), but I had before the hobbycnc board and i built the tachus42 and it was easy to...

Problem solved: it was caused by a tiny corrosion at the back of the y axis settings jumpers causing it to be in full step although the jumper is set to be half step.
Brushed with a teeth brush and...

Problem solved: it was caused by a tiny corrosion at the back of the y axis settings jumpers causing it to be in full step although the jumper is set to be half step.
Brushed with a teeth brush and...

Thx john for your reply.
I checked all the jumpers and connections and they were good, no short or anything else.
I also checked the software settings and were all correct.
But Could it be a virus...

Dear all,
I have my homemade cnc router machine based on hobbycnc pro board.
The machine was working perfectly and with a high precision, X and Y axis have the same setting (steps per unit,...

Dear all,
I have my homemade cnc router machine based on hobbycnc pro board.
The machine was working perfectly and with a high precision, X and Y axis have the same setting (steps per unit,...

hi everybody,
i have purchased a chinese spindle rated 3 phase 220v 400hz 1.5kw, and an LG SV-IC5 frequency inverter (manual: http://www.rototech.com.au/pdf/SV-iC5.pdf) .
Please may you advice me...

hi everybody,
i have purchased a chinese spindle rated 3 phase 220v 400hz 1.5kw, and an LG SV-IC5 frequency inverter (manual: http://www.rototech.com.au/pdf/SV-iC5.pdf) .
Please may you advice me...

thx guys, you are right, they are bipolar steppers, but i can,t find a DIY driver board that can handle 6 amps.

hello everybody,
I have 4 motors that I don;t know their exact specifications and would they be useful to be used instead of steppers in my homebuilt cnc machine.
my cnc machine is built based on 4...

Dear all, I built a cnc machine using rack and pinion mechanism for x and y motion.
I use mach3 as a controller softwre, and the same settings were given to x and y axis.
The y axis works great and...

Hello Everybody
I tried the PCI to Parallel card but it didn't work, I tried several accelerations and feed rates and the problem persists (lower and lower ... Z).
I used to use KCAM and it worked...

thx, I will buy a pci Card and try, till then have nice days

Hello everybody
I have the same problem as spacecase614, and as I deducted that you had solved the problem but I couldn't understand the solution, this problem is making me carzy .
please may you...

Hello everybody
I have the same problem as spacecase614, and as I deducted that you had solved the problem but I couldn't understand the solution, this problem is making me carzy .
please may you...

Hi
Forget whatever I said :)
I solved my problem but I don't know how , I just brushed the pcb with a shaving brush and soldered two copper places although I tested them with ohmometer and they...