Re: [ATM] Grit dispenser

["Thomas A. Moulton" <tom@moulton.us>]

Over kill? Maybe, but I would like to be able to let the machine
weigh the grit while I am wrapping the previous package...

tom

> Hi Tom,
> I have bought grit from you over the years so I remembered your name. The
> idea sounds good, although the controller you describe seems like an
> overkil (and too expensive). If you have a motor-controlled dispenser, say
> with an auger of some kind, then turning the thing on at intervals would
> do the trick without having to get into weighing the material. I am
> working on a slurry dispensing device based on a programmable timer. Ken
> Hunter sent me a simple pump that will probably work and is about $30.00
> brand new. The circuit, in its simplest from, could be made for less than
> $20.00. I'll keep you posted on the progress although right now I have
> little time for the project.
> Regards,
> Julio
>
> -----Original Message-----
> From: Thomas A. Moulton [mailto:tom@moulton.us]
> Sent: Tuesday, January 30, 2007 06:40 AM
> To: 'Julio Sanchez', atm@atmlist.net
> Subject: Re: [ATM] Grit dispenser
>
> Julio,
>
> I'm not going to use a timer, I am going to use a Scale w/RS232 interface
> and have a small cpu
> read the scale and control the Grit flow with a solenoid.
>
> The cpu is aka a PLC (Programmable Logic Controller) and for $99 you get 8
> bits in 6 relays out (2A each) to control things.
> There is also an expansion slot for one more I/O card.
>
> I tried a few things with the Hand Spreader (Fertilizer) and it did OK on
> Silicon Carbide but the finer Aluminum Oxide did not flow.
>
> So I am looking at new things to use as a hopper...
>
> I'll get there... no rush... been measuring grit by hand for 6 years... a
> few more months does not matter...
> (Yes Got Grit is 6 years old, I can't believe it!)
>
> Tomo
> ----- Original Message -----
> From: "Julio Sanchez" <jsanchez@skipanon.com>
> To: <atm@atmlist.net>
> Sent: Monday, January 29, 2007 9:44 PM
> Subject: Re: [ATM] Grit dispenser
>
>
>> In addition to the auger, or the dispenser Ken saw in Stockholm, you
>> will
>> need a lapse timer to turn the mechanism on and off. Otherwise the grit
>> salespeople will be very happy campers.
>> I am working on such a device and will share with the group when (if
>> ever)
>> it is finished. My gadget connects to a computer via the USB port and
>> allows prgrammming the device's on and off cycles that control several
>> AC
>> outlets, and many other neat things. So you go to bed, program your
>> mirror
>> grinding and polishing robot to start at 2:00 AM and when you wake up
>> the
>> Ritchie-Cretien is finished and ready for coating!
>> Regards,
>> Julio
>>
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>>
>
>
>
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