Tuesday, 20 March 2018

Re: [7x12minilathe] Re: Mini-Mill CNC, First Test of X-Axis.

 

Chris

You could use a cheap USB games controller and an Arduino. I use one on my CNC for jogging.
<https://www.youtube.com/watch?v=18DhP3zjP24>

Malcolm.

I don't suffer from insanity I enjoy it!
Mene, mene, tekel, upharsin
The writing is on the wall.
Ha-ktovet al ha-kir

--------------------------------------------
On Tue, 3/20/18, Chris Albertson albertson.chris@gmail.com [7x12minilathe] <7x12minilathe@yahoogroups.com> wrote:

Subject: Re: [7x12minilathe] Re: Mini-Mill CNC, First Test of X-Axis.
To: "7x12minilathe" <7x12minilathe@yahoogroups.com>
Date: Tuesday, March 20, 2018, 9:40 PM


 











On Tue, Mar 20, 2018 at
1:44 PM, Ralph Hulslander rhulslander@gmail.com
[7x12minilathe] <7x12minilathe@yahoogroups.com>
wrote:















 









With that pulse signal generator
how do you change Direction?
I usually just use a Arduino to
drive my
steppers.

Yes, an
Arduino or the like is better but I have the signal
generator already for other kinds of electronic projects
both audio and RF.      I'll certainly use a computer
of some type later.   This is just a simple mechanical test
to see if the parts fit and move.
You can't change direction with
a signal generator.   I have a toggle switch in my left
hand, just out of the video frame.  The inputs to the
driver electronics are "step" and
"direction" so it is easy to use a signal
generator and a switch.
I'm building this as a full CNC
machine but I want to think of a way to use it manually too.
  Likely I will make some kind of hand held pendent but I
don't know what it will look like yet other then likely
using this part: Hand-Wheel-Manual-Pulse-Encoder

 
Ralph
On Tue, Mar 20, 2018 at
4:00 PM, Tim Iafolla iafollatim@yahoo.com
[7x12minilathe] <7x12minilathe@yahoogroups.com
> wrote:















 










If anyone wants to experiment with a driven
x-axis, here's a very inexpensive pulse generator that
works fine for manual control of a stepper--about $4
shipped:
https://www.ebay.com/itm/Motor
-Pulse-Signal-Generator-for- Stepper-Motor-Driver-Controlle
r-Speed-Regulator/192408581681
?hash=item2ccc71f631:g:9TcAAOS w5RRafB4K

Feed it
9VDC, hook the clock and reverse outputs to a stepper
driver, and fiddle with the knob to adjust the speed of the
motor; mash one of the buttons for forward/reverse, and the
other for e-stop.  If it's a small motor you can even
run power (up to 24V
1A)  through this little guy to the stepper driver;
for larger motors use this piece for pulse and f/r signals
only and use a separate larger power supply to drive the
motor.

Speaking of motor and driver, this
looks like a good value ($34):https://www.ebay.com/itm/US-Sh
ip-Nema-23-Stepper-Motor-w-Tos hiba-Driver-TB6600-kit-1-9-N-
m-269-oz-in/322101071017?hash=
item4afeb84ca9:g:YD0AAOSwH2VaB JG2

You
might need to go up a size on the motor and driver for a
larger mill.  But to experiment with driving an x-axis for
a small mill, under $40 ain't too bad.
Tim









On Monday, March 19, 2018, 11:27:05
PM EDT, Chris Albertson albertson.chris@gmail.com
[7x12minilathe] <7x12minilathe@yahoogroups.com
> wrote:






 









For low speed as a power feed
the basic setup would cost about $80 for the motor, driver
power supply and so way to control it.

On
Mon, Mar 19, 2018 at 8:13 PM, soffee83@yahoo..com
[7x12minilathe] <7x12minilathe@yahoogroups.com
> wrote:















 









Thanks for the explanation Chris, I figured there
was something keeping it in check.

- also for the ideas on the stepper/power feed
thing. Might be something to think about as I was already
considering some sort of low tech driver for the X-axis.
I'll have to look into the pricing, but I've got
other projects in progress.

Take Care






















--

Chris Albertson
Redondo Beach,
California

























































--

Chris Albertson
Redondo Beach,
California











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