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At work I have used SolidWorks as CAD. Over all I like it. I have also tried SolidCam at work, but despite being way too expensive for home use, it is also over complicated. LazyCam could be an...

That I don't know, best would be to ask mach3 support team.

Without seeing what is going on with the LPT port it is mostly a trial and error approach.

So I suppose you configure Mach3 according to the TA8435H manual pages 9 to 12 right?

If all the above is OK, I would try somehow to check the LPT lines with an oscilloscope to make sure there are...

In Mach3 you MUST configure what pin of the LPT does what. Do you mean you did not configure that? Each board has a different assignment for the pins, so you have to tell Mach3 how that is.

Somethings just came to my mind. Could it be that you swapped the direction/pulse signals when configuring your software?
What software are you using?

My board is a bit different than yours. I have LEDs that show when pulses are coming from the LPT. Do you have that?

I think the first thing to check is whether the LPT is sending the pulses or...

I have seen posts in this forum from people that have burned the TA8435 above 30V or so... Maybe it is worth it to search the forum for such post and see exactly what they used.

IMHO I would not...

Happyjm, the comments of Dilbert0815 are totally right. Although the humming is probably caused by something else then the power supply (15v should at least make it rotate at low speed), you should...

What is a "high power" supply? You mean high voltage? How high are you using?
To my knoledge the TA8435 chip was not designed in China. If you burn it is because you run it out of spec, not because...

Strange... As far as individual motor are concerned the motion is always linear, the only difference I see from linear to circle is that the motor works in many different speed ranges during the cut....

Fair enough. All is a matter of measuring how much your time is worth. If you have time in your hands and not much money (been there...) here is my advice:

1-Get the 8435 datasheet and read it...

My 8435 board has 5 LEDs that blink when a signal is present. Well... I can't se a real blink, what I see is the LED fading in and out as the stepper accelerates and decelerates. So I suppose you...

Not really power down, but reduced current. Check the TA8435H datasheet (post #26 of this thread) you will find the explanation in page 21.
I definitely advice anyone with questions on the Chinese...

Well BearPaw, to say that this board is well protected would be a bold statment :D. What I say is:
- The diodes they use seem to be the right kind for reducing back EMF and as long as 24V is used it...

Ok, now I see what you mean. You want to fuse each chip individualy. Well, some PCB tracks will have to be cutted for that... but looks possible.

I just don't know how usefull that would be. These...

As for current, the motor should be as close to 1.5A as possible. More than that and you are wasting money on motor power you can not use, less than that and you may burn the motor. I would say the...

This advice by Kolias is a very wise one. I know a lot about electronics and had the impression that the board would be very easy to use by anyone. But by reading this forum I see this is not true. A...

This "1.5A average / 2.5A peak" statement in the datasheet of the board is most misleading.
These figures are absolute maximum of the chip and say nothing about the actual current for the particular...

Looks good Kolias.

The power resistors values are in fact 0.5 ohm (mF are for capacitors). This information about the 0.5 ohm resistors is important, as it tells that the chips output is set to...

My board does not mach exactly any of the diagrams posted here. But I don't care a lot about it. The Chinese manual tells what the pins are (I have posted it before in this forum).
What do you want...

Kolias. Those are not terminals. Those screws are holding the power regulator chips to their heatsinks. Generaly the heatsink connection of those chips are connected to ground so, whatever power...

You do have 5v generated on board, so what is this about terminals? You just have to power the board with 12v-24v and the regulators will do the rest. What do you mean by "only one terminal for each"?

The cilinders are capacitors, 470mF means 470 micro Farads, not voltage regulators... the regulators are the black square things with 3 legs bolted to the heatsink. Anyway, I am almost sure by your...

That is confusing now. My board has no RS232 connection (serial port), only a parallel port. Why would it need a serial port anyway?

kolias, I find one thing curious in your picture. It looks like...

I did not notice any problems with the 7812 (I always run at 24V).
I would certainly not try 36V with this board. 36V is an absolute maximum, run at that voltage and the back EMF from the stepper is...

I think that connecting a joystick is not that simple, once direction and step signals still have to be provided you will need at least a microcontroller connected to the joystick to make it work. As...

Good idea. Here it goes. And you may call it RP1 if you want :D

Yep, got my board a couple of weeks ago. It is working well on X + Y axis. What I meant is that the board does not contain any 555 chip. They claim that it goes automaticaly in low current mode when...

I never tried that, and I would also find usefull if anyone that have already used the "manual control" port to post results.
From all the information I have seen, I tend to beleave that “manual...

My board is a 5Ch, and I need to provide only one power line (from 12v up to 24V). It looks much like your picture, but it has one more stepper chip and a 5V regulator (7805), which I can not see in...