> On 6 Apr 2020, at 11:44 am, Jon Elson <el...@pico-systems.com> wrote:
>
> On 04/05/2020 03:48 PM, andrew beck wrote:
>> thanks for the replies guys. I am currently seeing what cards JT has that
>> I can get.
>>
>> I have another question though.
>>
>> I also have a slant bed cnc lathe here that I am going to retrofit next. I
>> will need at least 2 axis of stepgens and a 0-10 volt spindle output. I
>> will want to bring the encoders back to the control on this also so need at
>> least 2 encoder counters plus spindle encoder. The reason I go for the
>> step-dir servos is that it costs a extra 80usd per axis to get the analog
>> control option from the servo supplier and that adds up when you start
>> getting lots of servos. also step and dir is really easy to get started
>> with open loop.
>>
>> If I started from scratch and didn't have any mesa cards available what
>> would you guys recommend?
>>
>> I am quite happy to chop and change cards with my cnc mill if that helps.
>> Just want the cheapest and easiest option to set up. probably ease of
>> setup is more important than saving a little money.
>>
> There is also the Pico Systems Universal Stepper Controller. Runs off the
> parallel port, has
> 4 step generators and 4 encoder counters that can read encoders or the steps
> being sent.
> A $50 option gives analog spindle output. Also, 16 opto-isolated digital
> inputs, and place
> to put up to 8 SSRs for digital output. (Full disclosure, I make these.)
Sorry to jump in here but I have a quick question for Jon, do the Pico cards
require a base thread or do they use only a servo thread. I guess what I am
asking is are they OK on a PREEMPT RT machine with not so good latency or do
they require RTAI with a "good" latency.
>
> Jon
>
>
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