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Hi,
I have looked at this breakout board's manual. Looks like the PWM to spindle control is taken from the LPT pin #1 and outputted to "Spindle on/off control interface". I would recommend to set it...

Hi Walkit,
Here is the high-level scheme or the connection.
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You connect:

input of the converter to the LPT output pin of your choice (the one configured in Mach3), output of the...

Yes, the PCB is the same.

Hello all,

As per some requests, here are hex files for both 12f629 and 12f675 controllers.

That's great!

Hello Frareg,

I don't have the ESS Smoothstepper, so I can't test it myself, but from its description I understood that this is a CNC machine control board with Ethernet or USB interface, which...

Unfortunately, you cannot use this chip without major modifications of the microcode.
The problem is that 16F84A chip has only one timer (TMR0), but my microcode is using interrupts from two...

As per some requests, here are the source codes of the converter in C. For pic12f629 and pic12f675. Enjoy!

Sorry for such a delayed answer.
Yes, base PWM frequency is 350Hz. This is the setting you should set in Mach 3 setup. This frequency is used because it appeared to provide enough intermediate speed...

When I started to assemble the router, I have installed a webcam that shot a timelapse, which was converted to a cartoon, that shows the assembly process. Here it is:

CNC Router Assembly - YouTube...

aarongough and kevincnc, You are absolutely right about the spindle! And my story continues :)

While working with the router I started to note things that had to be improved. First of all, the...

Thanks a lot!
The base was temporary, the router just needs a surface to stand on. However, it was welded from a solid armature with a lot of intersections and two horizontal table plates (one of...

After the disassembly I got two piles of parts – one that had to be painted.
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And another – that had not.
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While metal parts were drying after the spray-painting
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I have...

Hello!
I would like to tell you about my CNC router that I have started to build a while ago.
Before I have started the build, there was some preparation time when I researched the web, purchased...

Hello Viumau,
I am glad it worked.
It seems that I haven't got your idea from the previous message. Anyway, didn't mean you have to disable spindle relays if you are using the PWM converter....

Hello Vimau,

Lets change the following settings:

Motor Outputs page: set "Dir pin" and "Dir port" pin to 0 - it is not needed for PWM control.
Spindle setup page: uncheck "Step/Dir motor",...

It is possible using an optic sensor. You can either buy one or take it out from an old printer. As far as I remember, it should be connected to "Reference" pin of Mach3. The most difficult thing...

I have created this circuit especially to control the spindle from Mach3. It works well with several brushed DC motors I've tested at 12 and 24V.

Hi guys!
That's great that this thread had been continued after a year of silence.
I am using the brushless inrunner motors in my router for about a year.
The first problem that I solved was the...

I haven't performed a research of how stable RPMs are, but can say for sure that I haven't noticed any difference in motor's behavior under control of this device and Futaba receiver :)
I think that...

Still actual?
I was wondering about the same problem last summer. I haven't managed to find an existing design quickly, so I decided to make the converter myself. The PIC controller was chosen...

To provide a smooth RPM control using Mach3 PWM output, I have made a simple opto-isolated electronic switch. You can see it in the lower-left corner of the control box.
129210 129211
Overall, my...

Initially there was a collet grip in the spindle capable of clamping workpieces up to 8mm in diameter. To work with larger parts, I have made a chuck.
129067
The lathe was equipped with a...

This is my first CNC project. It has been started about a year ago when I decided to build my CNC mill and ordered parts for it. It appeared that I have received electronics much earlier than...

You can use a simple opto-isolated PWM switch. I have created one for the DC spindle of my CNC lathe running at 24V DC, drawing approximately 3 or 4 amps. See the scheme attached.
The device is a...