An encoder anywhere on the ball screw would work. It's usually easier
to mount an encoder on the end of a ball screw or motor shaft rather
than between the motor and the ball screw. There are motors with a
shaft protruding on each end and it's common practice to mount the
encoder on the back
Bruce,
I"m not second guessing your suggestion, just trying to educate myself.
What advantage does having an encoder mounted on the lead screw on the end
opposite of the motor have compared to mounting it anywhere else on that
screw? It being a solid screw, why would it matter?
On Fri, Apr 24,
I wrote a short program for testing purposes as follows
o100 repeat [100]
m3
g4p.3
m5
g4p.3
m8
g4p.3
m9
g4p.3
o100 endrepeat
m2
I notice none of the program lines being executed are not highlighted.
But in the sim program the executed line is highlighted, but
as I run the sim, a single line at a
I'm just working off of the machine drawings,
All three Cincinnati Milacron VMC's in the shop work this way, table
surface is zero, and all Z values are in the positive, until you set
zero at the top of the part.
Rick
On 4/24/2015 11:16 AM, Chris Radek wrote:
> On Fri, Apr 24, 2015 at 11:07:4
On Fri, Apr 24, 2015 at 11:07:44AM -0400, Rick Lair wrote:
> Question regarding the INI entry regarding tool change on a VMC,
>
> TOOL_CHANGE_POSITION, says that this can be combined with
> TOOL_CHANGE_QUILL_UP, which it looks like TOOL_CHANGE_QUILL_UP will send
> the z axis to the 0.000" positi
Question regarding the INI entry regarding tool change on a VMC,
TOOL_CHANGE_POSITION, says that this can be combined with
TOOL_CHANGE_QUILL_UP, which it looks like TOOL_CHANGE_QUILL_UP will send
the z axis to the 0.000" position in absolute coodinates. Our machine is
setup so the top of the ta
LinuxCNC does a good job of compensating for backlash when it can, but
software can only do so much. Backlash is still a limiting factor that
degrades CNC performance. Position feedback isn't really needed for
backlash compensation as backlash can be measured and is repeatable and
predictable
On 24 April 2015 at 12:57, Matthew Clemence wrote:
> Ihave the opportunity
> to fit some linear scales (ortec) and wondered if there would be any
> advantage in changing the
> system to closed loop control with the steppers and the scales rather than
> the current open
> loop stepper system.
I s
Dear list,
I have working stepper system on a small mill which is quite an old machine
(a BCA jib borer). One
of the features is that it does have quite a lot of backlash on the lead
screws. I have the opportunity
to fit some linear scales (ortec) and wondered if there would be any
advantage in ch
Getting a bit old now, but this is a nice CNC machine made from tubing;
http://oneoceankayaks.com/madvac/madvac_index.htm
Regards
Roland
On 23 April 2015 at 17:17, andy pugh wrote:
> On 23 April 2015 at 13:55, Todd Zuercher
> wrote:
> > I doubt that would be stiff enoug
with an external computer, you can spy both send and receive data using
two serial port (each wired on receive input and ground only). I
remember to have used a program for serial monitoring using this
technique (under DOS), but I cannot recall the name.
Claude
Le 23.04.2015 18:15, Jon Elson a
On 4/23/2015 5:51 PM, linden wrote:
> Have a look here:
>
> http://www.rs232pro.com/cables.htm
>
> I have used both types of cables described here but the full duplex is
> probably what you are after.
>
> It is simple to make the hard part is keeping straight in your head
> which side is transmit a
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