On Thu, 20 Aug 2009, jon doe wrote:
>
> Yes on this particular machine an extra para port is possible, but I will not
> gain the ability to count the encoders I have as fast or as reliable as I
> would like. Finding how fast the audrino can count would be cool, as that
> would make for a very low cost expansion running off serial port.
>
> Like I said I am working on /planning 3 machines.
>
> The harbor freight 8x14 lathe is sitting on bench with a baldor 3 phases
> motor and an allen bradley VFD on the spindle. It has been like this for a
> while.(year) I have rudementry counter encoder and index pulse generator on
> it.
>
> The seacond is a harbor freight 4x5 mini micro lathe. This has the dc spindle
> motor. I thought I had the right pulleys to get the z axis set up but one of
> them is not going to work. I also had a AMC servo drive I would of liked to
> have used on the spindle but it was a can only interface, but it has nice
> fets in it for salvageing.
>
> By not learning in this case I was actually referring to learning about the h
> bridge and driving it, specifically, but also in general about fpga and such.
> I am not a great inovator as much as an awsome immitator. so as such I am
> adding alot of bits I'v seen from other projects.
>
> The milling machine (you guessed it harbor freight) has been semi enclosed
> and still fully manual.
>
> I see a long road ahead, but the journey should be grand, if the destination
> a little anti-climatic.
>
>
>
> Josh
>
>
> ________________________________
> From: Ray Henry <[email protected]>
> To: Enhanced Machine Controller (EMC) <[email protected]>
> Sent: Thursday, August 20, 2009 12:16:26 PM
> Subject: Re: [Emc-users] Mesa io card driving h bridge and counting encoders
>
> On Wed, 2009-08-19 at 21:54 -0700, jon doe wrote:
>> I am building a few machines currently.
> <s>
>> I am stuck at limited io ports and I would'nt learn as much.
>
> Hi Jon. Welcome to the project.
>
> You can learn a lot with just a few IO. HAL and ClassicLadder will
> allow you to connect those in creative ways. One of my early
> experiments was pulling a relay to make coffee in the morning.
>
> If your computer permits, an extra parport card can expand your project
> quite a bit. You sound like you should be able to build IO interface
> circuits pretty easily.
>
> Rayh
>
>
>
>
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Peter Wallace
Mesa Electronics
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