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Not sure where is the bast place to ask as most of the lists I frequent
for CNC are specific to a single option. I've got an Orac and a Compact8
Lathe both of which are running nicely from the Mach3 Mill computer, but
as yet nothing is hooked up to the encoder and index pulse signals.

I was going down the path of Eding USBCNC, but the current interface
boards are a lot more expensive than the original USB boards. PlanetCNC
offers a similar board to the earlier Eding one and prices look good
even adding the extra bit for the software licence. The Pokeys boards
look nice price wise, but I'm not sold on Mach4 having been using Mach3
on the mill for years. Does any other software take advantage of the
Pokeys hardware? Then we get back to LinuxCNC which I keep downloading
but never getting much further along than that despite having a couple
of other interfaces that are getting good responses about.

Nothing stands out as the ideal solution for a lathe setup like Mach3 is
for the mill, or am I missing something?

--
Lester Caine - G8HFL
-----------------------------
Contact -
L.S.Caine Electronic Services -
EnquirySolve -
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Rainbow Digital Media -

On 21/09/17 11:05, 'Henrik Olsson' henrik@...
[CAD_CAM_EDM_DRO] wrote:

Have you looked at the Acorn board from Centroid?



$265 with the free (and limited) version of the software, add $99 for
the next step up. Softwre and hardware from a single source so no
blaiming game (hopefully) and seems like an overall nice piece of kit
but I have no personal experience with Centroid or their products.
Someone on the list mentioned it while back.

I had looked at that one previously, but not sure about using it with
the low res encoder on the lathes. That and the 110V US kit is not
helpful in the UK ;) Also adding 5th axis is a problem ... just shipped
a 5 channel USBCNC system so ideally need more than 4 channels.

Looks like there are a couple of non Mach3 options to use with the
Pokeys boards which I'm looking at currently.

--
Lester Caine - G8HFL
-----------------------------
Contact -
L.S.Caine Electronic Services -
EnquirySolve -
Model Engineers Digital Workshop -
Rainbow Digital Media -

Yes You are missing something.

Suggest the pokeys.
Suggest the mach4 - even though I have not yet moved my lathe to it.

And very much suggest rigging an optical encoder (cheap, timing belts + 2 bearings ok) or ac spindle servo drive for the lathe if funds permit.

The only hw I personally know of that tracks servos well is Cslabs stuff. 6 axis, + spindle.
4 Mhz.
The pokeys will do so to 125 kHz - and this is often/mostly good enough. 4 axis on mach3.
Iirc more axis on mach4 with pokeys.

I think some of the best other controllers can read optical-encoder pulse streams, perhaps full encoder data.
cspxxx maybe..
Machmotion maybe..

Biggest/best choices I made;
using AC 2.5 kW servo on the lathe spindle at 1:3 via very strong belt drive HTD8-30,
using Csmio-IP-S controller.

Got:
90 Nm torque 0-1000 rpm; unbelievably good. I never expected this.
1/30.000 C axis positioning. Very good, but too soft for C axis drive with y.
Plan to try a planetary at 1:5 or so.

Real MPG. Outstanding. Pokeys does as good.
Nothing else is close. Better / = than HAAS.

The Pokeys stuff gets You 80%+ of the features for 1/3 the price.

Both pokeys and cslabs get you real-time single-ms feedholds, stops, probing, sso knobs, fro knobs, REAL mpgs etc.
Just like the 100k machines.

Re: servo.
A servo spindle gets unbelievable torque, css, surface speed, stability.
And does usually *not* break stuff in a crash.

It reacts so fast, that the metal parts are bent and tensioned, but not broken, before the servo faults.

--
-hanermo (cnc designs)

On 21/09/17 12:40, 'Henrik Olsson' henrik@...
[CAD_CAM_EDM_DRO] wrote:

They seem to recommend a resolution of 2000-10000 cycles per rev so yes,
if you have a low resolution encoder you might be better off changing
that to a "better" encoder. You could always ask them if your particular
encoder resolution is workable or not.

The encoder is build into the back of the Orac and Compact8 so not
something one would want to change.

You just said it was for lathes, I'm not used to general purpose lathes
having more than 4 axis+spindle.

I'd prefer to switch to something new rather than simply adding yet
another software package to have to learn ...

Not trying to convince you, just a bit surprised about your arguments
against it :-)

I'd prefer just the card and a lower customs charge importing it as I
have 24V UK supplies sitting on the shelf ;)

--
Lester Caine - G8HFL
-----------------------------
Contact -
L.S.Caine Electronic Services -
EnquirySolve -
Model Engineers Digital Workshop -
Rainbow Digital Media -

If you already have an encoder for index pulse, or tracking, you are all set.

--
-hanermo (cnc designs)

On 21/09/17 12:37, Hannu Venermo gcode.fi@... [CAD_CAM_EDM_DRO] wrote:

Yes You are missing something.

Suggest the pokeys.
Suggest the mach4 - even though I have not yet moved my lathe to it.

But I don't like Mach4 - already ruled that out!
I'd stick with Mach3 but it's not a long term option although I'm more
than happy to use it for another 10 years on the W2k computer that is
running my mill.

And very much suggest rigging an optical encoder (cheap, timing belts +
2 bearings ok) or ac spindle servo drive for the lathe if funds permit.

The whole point is that the Orac and Compact8 don't need any hardware
mods ... just some software that will work with there current hardware

Pokeys is looking like the best option but perhaps with Auggie rather
than Mach ...

--
Lester Caine - G8HFL
-----------------------------
Contact -
L.S.Caine Electronic Services -
EnquirySolve -
Model Engineers Digital Workshop -
Rainbow Digital Media -

On 21/09/17 13:59, Hannu Venermo gcode.fi@... [CAD_CAM_EDM_DRO] wrote:

If you already have an encoder for index pulse, or tracking, you are all
set.

'Problem' is it's only 90 or so slots ... think both machines are
different, but around 1 degree step size ...

On 21/09/2017 14:53, Lester Caine lester@... [CAD_CAM_EDM_DRO]
wrote:

They seem to recommend a resolution of 2000-10000 cycles per rev so yes,
if you have a low resolution encoder you might be better off changing
that to a "better" encoder. You could always ask them if your particular
encoder resolution is workable or not.

The encoder is build into the back of the Orac and Compact8 so not
something one would want to change.

You just said it was for lathes, I'm not used to general purpose lathes
having more than 4 axis+spindle.

I'd prefer to switch to something new rather than simply adding yet
another software package to have to learn ...

Not trying to convince you, just a bit surprised about your arguments
against it :-)

I'd prefer just the card and a lower customs charge importing it as I
have 24V UK supplies sitting on the shelf ;)

--
Lester Caine - G8HFL
-----------------------------
Contact -
L.S.Caine Electronic Services -
EnquirySolve -
Model Engineers Digital Workshop -
Rainbow Digital Media -

I doubt that it matters.
Imho.

The important thing is that the pulse is crisp, clean, has a fast edge.
And no variable fuzziness over speed.

--
-hanermo (cnc designs)

On 09/21/2017 04:30 AM, Lester Caine lester@... [CAD_CAM_EDM_DRO] wrote:

Then we get back to LinuxCNC which I keep downloading
but never getting much further along than that despite having a couple
of other interfaces that are getting good responses about.

LinuxCNC definitely does lathes very well. You pretty much have to have a "controller" rather than just a breakout board, or you will be limited to low spindle speeds when threading. Mesa and Pico Systems (that's me) both have controllers that are suitable. I know a number of Hardinge HNC and CHNC lathes are being run with my PWM controller and PWM servo amps.

See for a conversion using my boards.

Jon

On 21/09/17 17:08, Jon Elson elson@... [CAD_CAM_EDM_DRO] wrote:

Then we get back to LinuxCNC which I keep downloading
but never getting much further along than that despite having a couple
of other interfaces that are getting good responses about.

LinuxCNC definitely does lathes very well. You pretty much
have to have a "controller" rather than just a breakout
board, or you will be limited to low spindle speeds when
threading. Mesa and Pico Systems (that's me) both have
controllers that are suitable.

It is looking like this is the way forward and I do have a 7I90HD I
picked up a couple of years back, but wiring 50 way ribbon cables is a
pain. I'm a RaspberryPi user which while not ideal for LinuxCNC is a
further tangent, so a BeagleBone controller is also an option once I
make the mental move. I've been using Linux on the desktop for over 10
years so that is not a problem, just the 'controller' options.

--
Lester Caine - G8HFL
-----------------------------
Contact -
L.S.Caine Electronic Services -
EnquirySolve -
Model Engineers Digital Workshop -
Rainbow Digital Media -

On Thu, 21 Sep 2017 10:30:50 +0100, you wrote:

Not sure where is the bast place to ask as most of the lists I frequent
for CNC are specific to a single option. I've got an Orac and a Compact8
Lathe both of which are running nicely from the Mach3 Mill computer, but
as yet nothing is hooked up to the encoder and index pulse signals.

I was going down the path of Eding USBCNC, but the current interface
boards are a lot more expensive than the original USB boards. PlanetCNC
offers a similar board to the earlier Eding one and prices look good
even adding the extra bit for the software licence. The Pokeys boards
look nice price wise, but I'm not sold on Mach4 having been using Mach3
on the mill for years. Does any other software take advantage of the
Pokeys hardware? Then we get back to LinuxCNC which I keep downloading
but never getting much further along than that despite having a couple
of other interfaces that are getting good responses about.

Nothing stands out as the ideal solution for a lathe setup like Mach3 is
for the mill, or am I missing something?

Yea - just put an independent CNC control on it and forget Mach.

Plenty of choice for lathe controls on aliexpress.


Steve Blackmore
--

Mach4 and the PoKeys do the Lathe trick very well.? The conversational wizards created by machmotion are also good.

The M16 is a breakout board specially designed to lathes:

Checkout this controller using it:

Arturo Duncan

On 22/09/17 12:50, aduncan@... [CAD_CAM_EDM_DRO] wrote:

Mach4 and the PoKeys do the Lathe trick very well. The conversational
wizards created by machmotion are also good.

My concern with Mach4 is the fact that 'commercial use' is something of
a can of worms. Obvious for commercial shops a full licence for every
machine can be lost in the running costs, but smaller shops doing the
odd paid for job? A bit like waiting for Oracle to come around looking
at your use of MySQL :(

The M16 is a breakout board specially designed to lathes:

An alternate solution, but the pokeys57cnc expanded board is easier to
wire and no import costs. Just been told that it will not work with
existing Mach3 licenses when using for lathe side ... that is not clear
on the website!

Checkout this controller using it:

My package can handle up to 5 drivers
but that 5 channel board is no
longer available hence looking for an alternative :(

--
Lester Caine - G8HFL
-----------------------------
Contact -
L.S.Caine Electronic Services -
EnquirySolve -
Model Engineers Digital Workshop -
Rainbow Digital Media -

If it is around a 100 line encoder + index the printer port would certainly be an option with linuxcnc.

On 26/09/17 10:28, samcoinc2001@... [CAD_CAM_EDM_DRO] wrote:

If it is around a 100 line encoder + index the printer port would
certainly be an option with linuxcnc.

I have a compact 5 pc that I use with the original electronics +
linuxcnc through the printer port.? At 3000 rpm and 100 line - that is
only 5khz counting rate.? Linuxcnc should be able to count that without
breaking a sweat

Thanks for that Sam ... I think I have decided to take the plunge and
get a Linuxcnc box working ASAP. This gives the confidence that I can
probably get away with the simple interface and not worry initially
about coprocessors like the 7I90 board. I've a few ITX boxes with fast
boards in which had XP on and have now been replaced with RaspberryPi's
rather than W7+ :)

Sounds like you have the same distraction from getting jobs done. I've
three grand-kids who are reducing time available for other work :)

--
Lester Caine - G8HFL
-----------------------------
Contact -
L.S.Caine Electronic Services -
EnquirySolve -
Model Engineers Digital Workshop -
Rainbow Digital Media -