Re: intro and a few questions

["Les Watts" <leswatts-at-rabun.net>]

Dennis,

I have plenty of analysis tools to size motors and other
mechanical aspects of a machine. Given size, motor type,
etc I can easily tell you machine speed, velocity, acceleration,
stiffness, and other parameters. I can also work back from
your desired performance and find a minimum system configuration that will
work.

I also have a quantity of SEM servo motors (new) that I can
sell for a very good price. I would have to analyze whether they would be
appropriate for what you want to do. Steppers might work fine and cost less.

I have or can get good prices on linear rails and other motion components.

I too am using EMC to convert a large gantry machine; just
bought a Servotogo II card and have the new system just
about hooked up. Setting up the .ini file now.I am hoping it works well!

Leslie Watts
L M Watts Furniture
Tiger, Georgia USA
http://www.rabun.net/~leswatts/wattsfurniturewp.html
----- Original Message -----
From: "dennis pantazis" <dennis-at-pantazis.org>
To: "Multiple recipients of list" <emc-at-nist.gov>
Sent: Tuesday, February 26, 2002 12:16 AM
Subject: intro and a few questions


>
> greetings all:
>
> i have recently joined this list and have been scanning the archives to
> glean info. i am planning my jump into cnc with a bdi. i am an
> semi-experienced linux user and have had the fortune to use high end
> machines (puma lathe, hurco mill, ...) i have the basic gcode knowledge.
as
> far as linux goes, i am able to patch, compile and install source
packages.
> i do ok at basic scripting. surprisingly, my concerns are not about
getting
> the emc/linux combination to work, its the other stuff.
>
> i have been scouring the archives of the yahoo cad/cam/dro list as well,
but
> so far i have not had any luck figuring out the last bits. if anyone can
> help me get over this last hurdle, i would appreciate the guidance.
>
> my first project is to build a gantry type table to use with either a
> cutting torch or a plasma cutter. i have most of the mechanical tidbits
> figured out, and i am hoping for an overall size of about 4'x4'. 2d for
> sure, maybe 3d to adjust torch height, and i am thinking that i want a
> coolant off/on type function to control cutting function on/off. its not
> unlike the cnc router type affairs that i have seen, only for metal.
>
> 1. is the torch on-off really another axis? can anyone suggest an means of
> control.  it would be a simple off/on solenoid type control.
>
> 2. the only other thing at this point that is holding me back is the
motors.
> stepper or servo or chopper type. i tried a couple of the links to the
> stepper motor tutorials, but they seem to be dead.
> can someone point me to a resource or faq for them?
>
> 3. lastly, the whole notion of torque ratings of the motors. again,
pointers
> would be great. i don't think i need gorilla torque or speed..  i am
looking
> for 10-80 inches per minute travel. i have been scouring the scrapyard for
> motors, and surprisingly enough, i see A LOT of them, but havn't been able
> to identify my needs.
>
> again, i know this is mostly a dedicated emc list, but i am hoping someone
> can point me in the right direction to get over these last remaining
hurdles
> to get going.
>
> thanks in advance
>
> dennis
>
>
>
>
>