Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: catch22 on December 17, 2009, 08:58:48 PM

Title: Spindle encoder for cnc lathe conversion?
Post by: catch22 on December 17, 2009, 08:58:48 PM

I am starting my lathe conversion and I need to know what I need to purchess for the spindle encoder to use with mach 3 software.
Also do I need any thing else with the encoder to like a eletrical board or does the encoder just go to the parallel port?

Any advice would reall be great!!!!

Thanks Mike ???

Title: Re: Spindle encoder for cnc lathe conversion?
Post by: Peter Homann on December 17, 2009, 09:14:50 PM

Mike,

Have a look at the Omron EE-SY672 rande of sensors. The nice thing about these is that they take a wide range of voltage inputs (5V-24V) and have a filter and amplifier built in along with a sensitivity adjustment. It's basically a plug-n-play sensor.

They have reflective ones as well as slotted ones. Have a look at this engineering note.
http://www.homanndesigns.com/EN001.pdf

The sensors can be found here;

 http://au.mouser.com/catalog/catalogUSD/640/1873.pdf


Apart from supplying the sensor with 5Vdc you can just feed it straight into your parallel port, although a buffered non-opto-isolated (sensor contains an opto-isolater) input to a BOB mat be better.

Cheers,

Peter.


Cheers,


Peter.

Title: Re: Spindle encoder for cnc lathe conversion?
Post by: catch22 on December 17, 2009, 09:20:16 PM

Thanks Peter,
But what is input to a BOB mat be better mean?

Thanks Mike

Title: Re: Spindle encoder for cnc lathe conversion?
Post by: Peter Homann on December 17, 2009, 09:26:39 PM

Quote from: catch22 on December 17, 2009, 09:20:16 PM

Thanks Peter,
But what is input to a BOB mat be better mean?

Thanks Mike

It might be better to feed the input through a breakout board if you have one.

Cheers,

Peter.

Title: Re: Spindle encoder for cnc lathe conversion?
Post by: catch22 on December 17, 2009, 09:31:04 PM

Thanks Peter,
Any suggestions on what type of breakout board to get and where I can purchess one?

Thanks Mike

Title: Re: Spindle encoder for cnc lathe conversion?
Post by: Peter Homann on December 17, 2009, 09:36:17 PM

Quote from: catch22 on December 17, 2009, 09:31:04 PM

Thanks Peter,
Any suggestions on what type of breakout board to get and where I can purchess one?

Thanks Mike

Yes, Mine. :)

http://homanndesigns.com/store/index.php?main_page=product_info&products_id=59

It's a really good solid buffered I/O breakout board.

What stepper drivers to you have?
Cheers,

Peter.

Title: Re: Spindle encoder for cnc lathe conversion?
Post by: catch22 on December 17, 2009, 09:39:11 PM

I am going to be using compumotor zeta 4 drives.

Title: Re: Spindle encoder for cnc lathe conversion?
Post by: Peter Homann on December 17, 2009, 09:46:21 PM

Hi Mike,

Had a quick look at the data sheet. The drives should work fine with the MB-02 breakout board.


Cheers,


Peter.

Title: Re: Spindle encoder for cnc lathe conversion?
Post by: catch22 on December 17, 2009, 10:05:49 PM

Ok thanks again Peter!!!

Title: Re: Spindle encoder for cnc lathe conversion?
Post by: catch22 on December 17, 2009, 10:22:44 PM

Hey Peter, Another question with that encoder what do you need for it to read on the spindle?
I think you mount it so that it reads something on the spindle.Is this correct?

Thanks Mike

Title: Re: Spindle encoder for cnc lathe conversion?
Post by: Fastest1 on December 17, 2009, 10:57:19 PM

A piece of black tape across the pulley is all you need. It works great. I just got mine up and running this week. It is not without its problems setting up if it is your first time (it was my first). It really will depend on your understanding of mach and its settings. You can do it. Everyone here will help you.

Title: Re: Spindle encoder for cnc lathe conversion?
Post by: Peter Homann on December 18, 2009, 12:29:47 AM

If you are using a reflective sensor, come black tape will do.  Make it so it covers 50% of the shaft. Mach3 just looks for the edge.


If it is a slotted disk, make sure the splt is not too small.


Cheers,

Peter.