My Mazak V5 had a coarse helix cam which oriented the spindle. The one
at Galesburg used something closer to an inductive sensor to sense
index.. I think that got swapped out for an encoder. Once it picked up
the index it then rotated n counts to index the spindle for tool
change. If memory
> -Original Message-
> From: Jon Elson [mailto:el...@pico-systems.com]
> > Interesting topic.
> >
> > I take it then that you can't actually move the spindle to the index
> > position unless you have some sort of control beyond velocity?
> >
> > I'm currently using PWM on mine but once
On 03/18/2021 08:43 PM, John Dammeyer wrote:
-Original Message-
From: Jon Elson [mailto:el...@pico-systems.com]
Sent: March-18-21 6:22 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Spindle rps and index
On 03/18/2021 05:18 PM, Nicklas SB Karlsson wrote:
Need to ori
On Thursday 18 March 2021 18:29:50 andy pugh wrote:
> On Thu, 18 Mar 2021 at 20:52, Frank Tkalcevic
>
> wrote:
> > Is there anything special about driving these motors?
>
> I guess that as they are 20-step motors it is a long way between the
> poles, and microstepping relies on finding an elastic
> -Original Message-
> From: Jon Elson [mailto:el...@pico-systems.com]
> Sent: March-18-21 6:22 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Spindle rps and index
>
> On 03/18/2021 05:18 PM, Nicklas SB Karlsson wrote:
> > Need to orient spindle. Using a quadratu
On 03/18/2021 05:18 PM, Nicklas SB Karlsson wrote:
Need to orient spindle. Using a quadrature encoder spindle
need to be "homed" by rotating up to one revolution to
find index pulse but there is no homing for spindle. Know
what index pulse is in encoder but what does the index
enable signal fo
I once built a few tiny 3D printers out of old CD ROM drives with my students.
The motors are no larger than 15mm. I was able to use the finest micro-stepping
that those drivers are capable of. We did nothing out of the ordinary to hook
them up; the motor plugged directly in to the RAMPS board.
On Thu, 18 Mar 2021 at 20:52, Frank Tkalcevic
wrote:
> Is there anything special about driving these motors?
I guess that as they are 20-step motors it is a long way between the
poles, and microstepping relies on finding an elastic equilibrium
between poles.
I think that it is often like you de
Need to orient spindle. Using a quadrature encoder spindle need to be
"homed" by rotating up to one revolution to find index pulse but there
is no homing for spindle. Know what index pulse is in encoder but what
does the index enable signal for spindle do? or how is it used?
There is a float i
I have some small 15mm steppers, similar to this.
https://www.aliexpress.com/item/32872829855.html
I am trying to drive them with an A4988 stepper driver. I can run them at
full step and half step, but anything smaller and they don't move linearly -
one phase appears to step correctly, but
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