Dynomotion

Group: DynoMotion Message: 1168 From: RoyS Date: 5/25/2011
Subject: Introduce to Forum
Hi all,
I am a newby to CNC. Some backgroud. I spent 20years in Electronics Digital and analog design. some good exp with 8751 and PIC micro's, programming in ASM.

Now I own a Myfor ML7 lathe and a Myford knee VMC, and wish to CNC my lathe as my first intro to CNC.

I have calibrated my lathe so it has a pos offset of .005mm at 200mm from the chuck.

I have a Mitsubishi inverter for spindle speed control and built a PIC based tacho with an Alegro gear tooth sensor pickup on the spindle giving 48 pulses per revolution.

My desire is to firstly control both X and Z axiz then spindle speed.

OH i prefer to work in metric.

Any advice on using Tom kflop board will be welcome
Group: DynoMotion Message: 1169 From: Tom Kerekes Date: 5/25/2011
Subject: Re: Introduce to Forum
Hi Roy,
 
Can your "PIC based tacho" output something like quadrature to basically simulate a 48 line encoder?  To do this if it could output two signals (A and B) where each time it saw a tooth it would output something like a 4us pulse on A and also a 4us pulse on B but delayed by 2us.
 
Regards
TK 

Group: DynoMotion Message: 1170 From: RoyS Date: 5/25/2011
Subject: Re: Introduce to Forum
Hi Tom,
I only get one pulse per tooth from my Gear Tooth Sensor, but I could make up another sensor and mount it so it gives a second pulse out of phase.


--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi Roy,
>
> Can your "PIC based tacho" output something like quadrature to basically
> simulate a 48 line encoder?  To do this if it could output two signals (A and B)
> where each time it saw a tooth it would output something like a 4us pulse on A
> and also a 4us pulse on B but delayed by 2us.
>
> Regards
> TK 
>
>
>
>
> ________________________________
> From: RoyS <roy@...>
> To: DynoMotion@yahoogroups.com
> Sent: Wed, May 25, 2011 11:12:02 AM
> Subject: [DynoMotion] Introduce to Forum
>
>  
> Hi all,
> I am a newby to CNC. Some backgroud. I spent 20years in Electronics Digital and
> analog design. some good exp with 8751 and PIC micro's, programming in ASM.
>
> Now I own a Myfor ML7 lathe and a Myford knee VMC, and wish to CNC my lathe as
> my first intro to CNC.
>
> I have calibrated my lathe so it has a pos offset of .005mm at 200mm from the
> chuck.
>
> I have a Mitsubishi inverter for spindle speed control and built a PIC based
> tacho with an Alegro gear tooth sensor pickup on the spindle giving 48 pulses
> per revolution.
>
> My desire is to firstly control both X and Z axiz then spindle speed.
>
> OH i prefer to work in metric.
>
> Any advice on using Tom kflop board will be welcome
>
Group: DynoMotion Message: 1171 From: Tom Kerekes Date: 5/25/2011
Subject: Re: Introduce to Forum
That should work.
TK