Re: [Emc-users] OT: About a chat here on vacuum table ideas

[Les Newell]

Yes, 6mm (1/4") MDF works well. It has a bit of restriction so you don't 
lose all of your vacuum when you cut right through your parts.
What sort of vacuum pumps did you have in mind? You'll probably need a 
minimum of 250 cubic metres per hour for decent hold down. In terms of 
motor size, that's getting on towards 7.5kw /10HP.


Les

On 09/06/2021 03:46, Leonardo Marsaglia wrote:

Thank you guys for your answers!

I've been reading and apparently MDF with a skim cut is pretty good to
distribute the vacuum all around it's surface given its porosity. I think
I'm gonna try that option first to see how severe is the vacuum loss when
the cuts are made.

Second option would be what Todd suggests, wich is a little trickier mostly
because my surface needs to be 3000 mm x 2000 mm, so that's a lot of
springs...

I'll keep you informed as the project progresses.

Thanks as always for your help :)




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Re: [Emc-users] OT: About a chat here on vacuum table ideas

[Roland Jollivet]

A friend was complaining about the need for 6kW vacuum system on a large
table and this got me thinking

Another way is to divide the table up into squares, grid wise, and have a
.. separate.. vacuum motor for each section. The motor is mounted under the
table at the bottom of each 'box'.
You can get ~1.5kW motors really cheap, and now it's easy to make up a
system with as many kW as you want.

Far easier to find 4 vacuum motors than a 6kW pump.

Roland



On Wed, 9 Jun 2021 at 17:13, Todd Zuercher  wrote:

> For milling sheet material on a large table, an MDF spoil board on top of
> a vacuum grid is usually the best option.  But for small parts such as
> solid wood items vacuum pods are usually a better choice.  In a pod
> arrangement with  the part held directly is where the valves are useful.
>
> Todd Zuercher
> P. Graham Dunn Inc.
> 630 Henry Street
> Dalton, Ohio 44618
> Phone:  (330)828-2105ext. 2031
>
> -Original Message-
> From: Leonardo Marsaglia 
> Sent: Tuesday, June 08, 2021 10:47 PM
> To: Enhanced Machine Controller (EMC) 
> Subject: Re: [Emc-users] OT: About a chat here on vacuum table ideas
>
> [EXTERNAL EMAIL] Be sure links are safe.
>
> Thank you guys for your answers!
>
> I've been reading and apparently MDF with a skim cut is pretty good to
> distribute the vacuum all around it's surface given its porosity. I think
> I'm gonna try that option first to see how severe is the vacuum loss when
> the cuts are made.
>
> Second option would be what Todd suggests, wich is a little trickier
> mostly because my surface needs to be 3000 mm x 2000 mm, so that's a lot of
> springs...
>
> I'll keep you informed as the project progresses.
>
> Thanks as always for your help :)
>
> El lun, 7 jun 2021 a las 17:11, Todd Zuercher ()
> escribió:
>
> > It might work, but you may have trouble with the pellet sticking in
> > the seat and not opening when you need it to, or worse yet if your
> > part doen't quite seal good enough to the table, sucking shut and
> > losing all holding power.
> >
> > What I've seen more commonly used is a spring loaded valve where a
> > spring pushes the pellet(ball) up to seal the vacuum port.  When no
> > part is in place the spring pushes the ball up to seal the vacuum
> > port, and the ball sticks up a bit above the part sealing surface.
> > When the part is placed on top, it pushes the ball down opening the
> > valve and allowing the vacuum to flow.
> >
> > Todd Zuercher
> > P. Graham Dunn Inc.
> > 630 Henry Street
> > Dalton, Ohio 44618
> > Phone:  (330)828-2105ext. 2031
> >
> > -Original Message-
> > From: Leonardo Marsaglia 
> > Sent: Saturday, June 05, 2021 11:50 PM
> > To: Enhanced Machine Controller (EMC)
> > 
> > Subject: Re: [Emc-users] OT: About a chat here on vacuum table ideas
> >
> > [EXTERNAL EMAIL] Be sure links are safe.
> >
> > I meant to say:
> >
> > When there is a part over that hole and before the pump is on, the
> > pellet will be resting on the groove. As soon as the pump is on the
> > vacuum will be immediately sealed by the part, not allowing the
> > suction to suck the pellet
> >
> > El dom, 6 jun 2021 a las 0:48, Leonardo Marsaglia
> > ( > >)
> > escribió:
> >
> > > Hello guys,
> > >
> > > I hope you're all doing well.
> > >
> > > Not so long ago (or may be yes) I recall reading someone on this
> > > list talking about an idea of using plastic pellets as closing
> > > valves for an MDF vacuum table.
> > >
> > > The basic idea was: The pellet falls into a spherical hole that has
> > > a round groove with a slight angle on its side. So when the vacuum
> > > is not applied the plastic pellet can slide thru the groove and
> > > leave the hole open (I imagine that the vacuum pump could be
> > > reversed so one can blow to clear the holes and force the pellets to
> the groove quicker).
> > > When there is a part over that hole and before the pump is on, the
> > > vacuum will be immediately sealed by the part, not allowing the
> > > suction to suck the pellet. Once the hole is again free, the suction
> > > will slide the pellet until the hole is sealed (useful to avoid
> > > vacuum loses on the path where the tool cuts the material).
> > >
> > > Are there any practical examples or any real life experience of this
> > idea?
> > > That would be more than useful.
> > >
> > > Thanks as always!
> > >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
>
> ___
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>
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> 

Re: [Emc-users] OT: About a chat here on vacuum table ideas

[Todd Zuercher]

1/4" MDF is too thin to skin off the dense layers. (It almost doesn't' even 
have a porous core like thicker MDFs) And it doesn't offer much protection from 
coding mistakes.  I prefer 3/4" MDF and then mill off about 0.05" off of each 
sided to open it up.  Then you have enough thickness to skim off layers as 
needed to get a good smooth holding surface after running a few different 
files.  We typically remove only 0.01" when resurfacing the spoilboard.  Then 
replace the spoil board when it gets to be less than about 0.35" thick.  We run 
3 shifts a day and a new spoilboard will typically last us about a month on a 
machine.

As to vacuum requirements for a 5ftx10ft table and spoil board I like to have 
about 300ACFM (200 minimum) and be able to maintain at least 15inHg, which 
typically takes at least about a 10hp vacuum pump (20hp would be much better.) 

Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street 
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031

-Original Message-
From: Les Newell  
Sent: Wednesday, June 09, 2021 9:25 AM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] OT: About a chat here on vacuum table ideas

[EXTERNAL EMAIL] Be sure links are safe.

Yes, 6mm (1/4") MDF works well. It has a bit of restriction so you don't lose 
all of your vacuum when you cut right through your parts.
What sort of vacuum pumps did you have in mind? You'll probably need a minimum 
of 250 cubic metres per hour for decent hold down. In terms of motor size, 
that's getting on towards 7.5kw /10HP.

Les

On 09/06/2021 03:46, Leonardo Marsaglia wrote:
> Thank you guys for your answers!
>
> I've been reading and apparently MDF with a skim cut is pretty good to 
> distribute the vacuum all around it's surface given its porosity. I 
> think I'm gonna try that option first to see how severe is the vacuum 
> loss when the cuts are made.
>
> Second option would be what Todd suggests, wich is a little trickier 
> mostly because my surface needs to be 3000 mm x 2000 mm, so that's a 
> lot of springs...
>
> I'll keep you informed as the project progresses.
>
> Thanks as always for your help :)



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Re: [Emc-users] OT: About a chat here on vacuum table ideas

[Nathan Hartman]

On Tue, Jun 8, 2021 at 10:49 PM Leonardo Marsaglia
 wrote:
> I've been reading and apparently MDF with a skim cut is pretty good to
> distribute the vacuum all around it's surface given its porosity. I think
> I'm gonna try that option first to see how severe is the vacuum loss when
> the cuts are made.

We cover the exposed parts of our spoilboard with plastic sheet or
aluminum foil or whatever, to avoid losing vacuum. But we are only
doing drag-knife cutting on it, not milling. We don't have a strong
enough vacuum pump to do milling. The one time we tried, the part
shifted.

YouTube has lots of videos of vacuum routers and you can see
everything when they show how to replace the spoilboard etc.

Cheers


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Re: [Emc-users] OT: About a chat here on vacuum table ideas

[Todd Zuercher]

For milling sheet material on a large table, an MDF spoil board on top of a 
vacuum grid is usually the best option.  But for small parts such as solid wood 
items vacuum pods are usually a better choice.  In a pod arrangement with  the 
part held directly is where the valves are useful.

Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street 
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031

-Original Message-
From: Leonardo Marsaglia  
Sent: Tuesday, June 08, 2021 10:47 PM
To: Enhanced Machine Controller (EMC) 
Subject: Re: [Emc-users] OT: About a chat here on vacuum table ideas

[EXTERNAL EMAIL] Be sure links are safe.

Thank you guys for your answers!

I've been reading and apparently MDF with a skim cut is pretty good to 
distribute the vacuum all around it's surface given its porosity. I think I'm 
gonna try that option first to see how severe is the vacuum loss when the cuts 
are made.

Second option would be what Todd suggests, wich is a little trickier mostly 
because my surface needs to be 3000 mm x 2000 mm, so that's a lot of springs...

I'll keep you informed as the project progresses.

Thanks as always for your help :)

El lun, 7 jun 2021 a las 17:11, Todd Zuercher ()
escribió:

> It might work, but you may have trouble with the pellet sticking in 
> the seat and not opening when you need it to, or worse yet if your 
> part doen't quite seal good enough to the table, sucking shut and 
> losing all holding power.
>
> What I've seen more commonly used is a spring loaded valve where a 
> spring pushes the pellet(ball) up to seal the vacuum port.  When no 
> part is in place the spring pushes the ball up to seal the vacuum 
> port, and the ball sticks up a bit above the part sealing surface.  
> When the part is placed on top, it pushes the ball down opening the 
> valve and allowing the vacuum to flow.
>
> Todd Zuercher
> P. Graham Dunn Inc.
> 630 Henry Street
> Dalton, Ohio 44618
> Phone:  (330)828-2105ext. 2031
>
> -Original Message-
> From: Leonardo Marsaglia 
> Sent: Saturday, June 05, 2021 11:50 PM
> To: Enhanced Machine Controller (EMC) 
> 
> Subject: Re: [Emc-users] OT: About a chat here on vacuum table ideas
>
> [EXTERNAL EMAIL] Be sure links are safe.
>
> I meant to say:
>
> When there is a part over that hole and before the pump is on, the 
> pellet will be resting on the groove. As soon as the pump is on the 
> vacuum will be immediately sealed by the part, not allowing the 
> suction to suck the pellet
>
> El dom, 6 jun 2021 a las 0:48, Leonardo Marsaglia 
> ( >)
> escribió:
>
> > Hello guys,
> >
> > I hope you're all doing well.
> >
> > Not so long ago (or may be yes) I recall reading someone on this 
> > list talking about an idea of using plastic pellets as closing 
> > valves for an MDF vacuum table.
> >
> > The basic idea was: The pellet falls into a spherical hole that has 
> > a round groove with a slight angle on its side. So when the vacuum 
> > is not applied the plastic pellet can slide thru the groove and 
> > leave the hole open (I imagine that the vacuum pump could be 
> > reversed so one can blow to clear the holes and force the pellets to the 
> > groove quicker).
> > When there is a part over that hole and before the pump is on, the 
> > vacuum will be immediately sealed by the part, not allowing the 
> > suction to suck the pellet. Once the hole is again free, the suction 
> > will slide the pellet until the hole is sealed (useful to avoid 
> > vacuum loses on the path where the tool cuts the material).
> >
> > Are there any practical examples or any real life experience of this
> idea?
> > That would be more than useful.
> >
> > Thanks as always!
> >
>
> ___
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> https://lists.sourceforge.net/lists/listinfo/emc-users
>
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> https://lists.sourceforge.net/lists/listinfo/emc-users
>

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[Emc-users] CUI devices

[Roland Jollivet]

Hi

I was wondering what experience people have had with the CUI encoders.

Mostly looking at the costs. The AMT13 series comes as a kit with all the
adapters, at $33
But it's supplied with no female connector. You might only realise this
when you open the box, after paying for shipping, duties and customs.

So you try finding a mating connector, and they're fairly obscure, but be
sure to order some pins too, otherwise you just get the plastic shell !

Alternatively buy a ready cable from CUI (Digikey) for your encoder at $25
!

It all sounds like a really shitty deal to me.
(a friends experience..)

Roland



https://www.digikey.com/en/products/detail/cui-devices/AMT132S-V/10269185?WT.z_cid=ref_neda_dkc_buynow_cuidevices_source=ecia_medium=aggregator_campaign=cuidevices

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Re: [Emc-users] OT: About a chat here on vacuum table ideas

[Thaddeus Waldner]

Some CNC lasers and plasma cutters use zoned smoke collection system that opens 
different shutters depending on the gantry position. Might something similar 
work for holding  the workpiece?

Thaddeus Waldner
Newdale School
Elkton, SD 57026

From: Roland Jollivet 
Sent: Wednesday, June 9, 2021 10:31:01 AM
To: Enhanced Machine Controller (EMC) 
Subject: Re: [Emc-users] OT: About a chat here on vacuum table ideas

A friend was complaining about the need for 6kW vacuum system on a large
table and this got me thinking

Another way is to divide the table up into squares, grid wise, and have a
.. separate.. vacuum motor for each section. The motor is mounted under the
table at the bottom of each 'box'.
You can get ~1.5kW motors really cheap, and now it's easy to make up a
system with as many kW as you want.

Far easier to find 4 vacuum motors than a 6kW pump.

Roland



On Wed, 9 Jun 2021 at 17:13, Todd Zuercher  wrote:

> For milling sheet material on a large table, an MDF spoil board on top of
> a vacuum grid is usually the best option.  But for small parts such as
> solid wood items vacuum pods are usually a better choice.  In a pod
> arrangement with  the part held directly is where the valves are useful.
>
> Todd Zuercher
> P. Graham Dunn Inc.
> 630 Henry Street
> Dalton, Ohio 44618
> Phone:  (330)828-2105ext. 2031
>
> -Original Message-
> From: Leonardo Marsaglia 
> Sent: Tuesday, June 08, 2021 10:47 PM
> To: Enhanced Machine Controller (EMC) 
> Subject: Re: [Emc-users] OT: About a chat here on vacuum table ideas
>
> [EXTERNAL EMAIL] Be sure links are safe.
>
> Thank you guys for your answers!
>
> I've been reading and apparently MDF with a skim cut is pretty good to
> distribute the vacuum all around it's surface given its porosity. I think
> I'm gonna try that option first to see how severe is the vacuum loss when
> the cuts are made.
>
> Second option would be what Todd suggests, wich is a little trickier
> mostly because my surface needs to be 3000 mm x 2000 mm, so that's a lot of
> springs...
>
> I'll keep you informed as the project progresses.
>
> Thanks as always for your help :)
>
> El lun, 7 jun 2021 a las 17:11, Todd Zuercher ()
> escribió:
>
> > It might work, but you may have trouble with the pellet sticking in
> > the seat and not opening when you need it to, or worse yet if your
> > part doen't quite seal good enough to the table, sucking shut and
> > losing all holding power.
> >
> > What I've seen more commonly used is a spring loaded valve where a
> > spring pushes the pellet(ball) up to seal the vacuum port.  When no
> > part is in place the spring pushes the ball up to seal the vacuum
> > port, and the ball sticks up a bit above the part sealing surface.
> > When the part is placed on top, it pushes the ball down opening the
> > valve and allowing the vacuum to flow.
> >
> > Todd Zuercher
> > P. Graham Dunn Inc.
> > 630 Henry Street
> > Dalton, Ohio 44618
> > Phone:  (330)828-2105ext. 2031
> >
> > -Original Message-
> > From: Leonardo Marsaglia 
> > Sent: Saturday, June 05, 2021 11:50 PM
> > To: Enhanced Machine Controller (EMC)
> > 
> > Subject: Re: [Emc-users] OT: About a chat here on vacuum table ideas
> >
> > [EXTERNAL EMAIL] Be sure links are safe.
> >
> > I meant to say:
> >
> > When there is a part over that hole and before the pump is on, the
> > pellet will be resting on the groove. As soon as the pump is on the
> > vacuum will be immediately sealed by the part, not allowing the
> > suction to suck the pellet
> >
> > El dom, 6 jun 2021 a las 0:48, Leonardo Marsaglia
> > ( > >)
> > escribió:
> >
> > > Hello guys,
> > >
> > > I hope you're all doing well.
> > >
> > > Not so long ago (or may be yes) I recall reading someone on this
> > > list talking about an idea of using plastic pellets as closing
> > > valves for an MDF vacuum table.
> > >
> > > The basic idea was: The pellet falls into a spherical hole that has
> > > a round groove with a slight angle on its side. So when the vacuum
> > > is not applied the plastic pellet can slide thru the groove and
> > > leave the hole open (I imagine that the vacuum pump could be
> > > reversed so one can blow to clear the holes and force the pellets to
> the groove quicker).
> > > When there is a part over that hole and before the pump is on, the
> > > vacuum will be immediately sealed by the part, not allowing the
> > > suction to suck the pellet. Once the hole is again free, the suction
> > > will slide the pellet until the hole is sealed (useful to avoid
> > > vacuum loses on the path where the tool cuts the material).
> > >
> > > Are there any practical examples or any real life experience of this
> > idea?
> > > That would be more than useful.
> > >
> > > Thanks as always!
> > >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> > 

Re: [Emc-users] OT: About a chat here on vacuum table ideas

[Les Newell]

I tested a 1.5kW vacuum cleaner motor for this application a while back 
and wasn't impressed. They don't generate enough vacuum in my opinion. 
You really need vane pumps or side channel blowers. Vane pumps generate 
a very strong vacuum but use a lot of power. Side channel blowers 
generate more flow for the same power but less vacuum. I used to operate 
a machine with a  1.2m x 2.4 bed that had two 2kW side channel blowers 
and the vacuum was marginal. I did have parts move occasionally.


Les

On 09/06/2021 16:31, Roland Jollivet wrote:

A friend was complaining about the need for 6kW vacuum system on a large
table and this got me thinking

Another way is to divide the table up into squares, grid wise, and have a
.. separate.. vacuum motor for each section. The motor is mounted under the
table at the bottom of each 'box'.
You can get ~1.5kW motors really cheap, and now it's easy to make up a
system with as many kW as you want.

Far easier to find 4 vacuum motors than a 6kW pump.

Roland





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Re: [Emc-users] OT: About a chat here on vacuum table ideas

[Todd Zuercher]

There is a wide discrepancy between the levels of vacuum that different types 
of vacuum pumps and blowers can generate.  Some kinds are rotary screw pumps, 
liquid ring pumps, rotary vane pumps, positive displacement blowers like a 
roots blower, or regenerative blowers (which are more like a fan).  You need to 
consider both the level of vacuum you need to attain and the amount of air you 
need to move to get there.  Compare a 10HP regen blower, vs a 10HP rotary vane 
pump.  The regen blower can move 4 times as much air as the positive 
displacement vane pump.  But the vain pump can draw more than twice the vacuum 
level.  Which would hold a part better will depend a lot on table design and 
area.  An open hole table with small pockets over the holes can work very well 
with the blower, but the blower will struggle trying to hold small parts on a 
fall board.  The vane pump would work great on closed pods and jigs or a 
smaller fall board, but if the table is very large or an open flow design it 
won't be able to keep up and vacuum levels could fall too low.

A 5ft x 10ft fall board (sheet of MDF that has been skinned can flow nearly 
300acfm (maybe a bit more) of air when a 15inHg vaccum is applied to it.  But 
if you need 20inHg to hold your parts, you're going to need a much larger and 
more powerful pump to get there (probably at least double).  But if you only 
need 10inHG the flow through the board will be much less probably closer to 
100ACFM.  The greater the pressure differential the higher the flow and 
leakage.  This is why gasketed jigs and pods work so much better for holding 
pieces.  You don't have the flow to contend with, you only need a pump capable 
of generating the pressure level you need and the ACFMs of the pump are less 
important.

Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street 
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031

-Original Message-
From: Les Newell  
Sent: Wednesday, June 09, 2021 2:42 PM
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] OT: About a chat here on vacuum table ideas

[EXTERNAL EMAIL] Be sure links are safe.

I tested a 1.5kW vacuum cleaner motor for this application a while back and 
wasn't impressed. They don't generate enough vacuum in my opinion.
You really need vane pumps or side channel blowers. Vane pumps generate a very 
strong vacuum but use a lot of power. Side channel blowers generate more flow 
for the same power but less vacuum. I used to operate a machine with a  1.2m x 
2.4 bed that had two 2kW side channel blowers and the vacuum was marginal. I 
did have parts move occasionally.

Les

On 09/06/2021 16:31, Roland Jollivet wrote:
> A friend was complaining about the need for 6kW vacuum system on a 
> large table and this got me thinking
>
> Another way is to divide the table up into squares, grid wise, and 
> have a .. separate.. vacuum motor for each section. The motor is 
> mounted under the table at the bottom of each 'box'.
> You can get ~1.5kW motors really cheap, and now it's easy to make up a 
> system with as many kW as you want.
>
> Far easier to find 4 vacuum motors than a 6kW pump.
>
> Roland
>



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Re: [Emc-users] CUI devices

[John Dammeyer]

I've used the AMT112Q-V without any issues compared to the problems with the US 
Digital ones.  And they fit better.
 

 
> -Original Message-
> From: andrew beck [mailto:andrewbeck0...@gmail.com]
> Sent: June-09-21 12:36 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] CUI devices
> 
> For what is lts worth you can get a 2500ppr encoder for 30usd from my servo
> supplier.
> 
> Or a a 5000ppr.
> 
> Or you can go absolute.  And get a 13 something ppr encoder.  They are
> about 70usd I think
> 
> I think it's 17bit.  But would have to check
> 
> On Thu, Jun 10, 2021, 7:31 AM Sam Sokolik <  
> samco...@gmail.com> wrote:
> 
> > in the datasheet the
> > accuracy 0.2 degrees
> >
> > so, in my mind, it is no better than a 1800 count encoder if that..   I
> > have used them in the past - they work ok for things like spindle
> > feedback.   In my experience - for servo positioning feedback - it is too
> > noisy..
> >
> >   
> > https://www.youtube.com/watch?v=8RWqHW2AtrA
> >
> >
> >
> > On Wed, Jun 9, 2021 at 11:50 AM Roland Jollivet  > >
> > wrote:
> >
> > > Hi
> > >
> > > I was wondering what experience people have had with the CUI encoders.
> > >
> > > Mostly looking at the costs. The AMT13 series comes as a kit with all the
> > > adapters, at $33
> > > But it's supplied with no female connector. You might only realise this
> > > when you open the box, after paying for shipping, duties and customs.
> > >
> > > So you try finding a mating connector, and they're fairly obscure, but be
> > > sure to order some pins too, otherwise you just get the plastic shell !
> > >
> > > Alternatively buy a ready cable from CUI (Digikey) for your encoder at
> > $25
> > > !
> > >
> > > It all sounds like a really shitty deal to me.
> > > (a friends experience..)
> > >
> > > Roland
> > >
> > >
> > >
> > >
> > >
> >  
> > 
> >  https://www.digikey.com/en/products/detail/cui-devices/AMT132S-
 

 > 
V/10269185?WT.z_cid=ref_neda_dkc_buynow_cuidevices_source=ecia_medium=aggregator_campaign=cuidevice
 

 > s
> > >
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> > >   
> > > https://lists.sourceforge.net/lists/listinfo/emc-users
> > >
> >
> > ___
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> >   Emc-users@lists.sourceforge.net
> >   
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> 
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Re: [Emc-users] CUI devices

[andrew beck]

For what is lts worth you can get a 2500ppr encoder for 30usd from my servo
supplier.

Or a a 5000ppr.

Or you can go absolute.  And get a 13 something ppr encoder.  They are
about 70usd I think

I think it's 17bit.  But would have to check

On Thu, Jun 10, 2021, 7:31 AM Sam Sokolik  wrote:

> in the datasheet the
> accuracy 0.2 degrees
>
> so, in my mind, it is no better than a 1800 count encoder if that..   I
> have used them in the past - they work ok for things like spindle
> feedback.   In my experience - for servo positioning feedback - it is too
> noisy..
>
> https://www.youtube.com/watch?v=8RWqHW2AtrA
>
>
>
> On Wed, Jun 9, 2021 at 11:50 AM Roland Jollivet  >
> wrote:
>
> > Hi
> >
> > I was wondering what experience people have had with the CUI encoders.
> >
> > Mostly looking at the costs. The AMT13 series comes as a kit with all the
> > adapters, at $33
> > But it's supplied with no female connector. You might only realise this
> > when you open the box, after paying for shipping, duties and customs.
> >
> > So you try finding a mating connector, and they're fairly obscure, but be
> > sure to order some pins too, otherwise you just get the plastic shell !
> >
> > Alternatively buy a ready cable from CUI (Digikey) for your encoder at
> $25
> > !
> >
> > It all sounds like a really shitty deal to me.
> > (a friends experience..)
> >
> > Roland
> >
> >
> >
> >
> >
> https://www.digikey.com/en/products/detail/cui-devices/AMT132S-V/10269185?WT.z_cid=ref_neda_dkc_buynow_cuidevices_source=ecia_medium=aggregator_campaign=cuidevices
> >
> > ___
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> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
>
> ___
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Re: [Emc-users] CUI devices

[Sam Sokolik]

in the datasheet the
accuracy 0.2 degrees

so, in my mind, it is no better than a 1800 count encoder if that..   I
have used them in the past - they work ok for things like spindle
feedback.   In my experience - for servo positioning feedback - it is too
noisy..

https://www.youtube.com/watch?v=8RWqHW2AtrA



On Wed, Jun 9, 2021 at 11:50 AM Roland Jollivet 
wrote:

> Hi
>
> I was wondering what experience people have had with the CUI encoders.
>
> Mostly looking at the costs. The AMT13 series comes as a kit with all the
> adapters, at $33
> But it's supplied with no female connector. You might only realise this
> when you open the box, after paying for shipping, duties and customs.
>
> So you try finding a mating connector, and they're fairly obscure, but be
> sure to order some pins too, otherwise you just get the plastic shell !
>
> Alternatively buy a ready cable from CUI (Digikey) for your encoder at $25
> !
>
> It all sounds like a really shitty deal to me.
> (a friends experience..)
>
> Roland
>
>
>
>
> https://www.digikey.com/en/products/detail/cui-devices/AMT132S-V/10269185?WT.z_cid=ref_neda_dkc_buynow_cuidevices_source=ecia_medium=aggregator_campaign=cuidevices
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>

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Re: [Emc-users] CUI devices

[Sam Sokolik]

remember to read the spec sheet for the accuracy of the encoder - I was
looking at some 15 bit encoders or some such and they didn't seem that
great...


On Wed, Jun 9, 2021 at 3:14 PM John Dammeyer  wrote:

> I've used the AMT112Q-V without any issues compared to the problems with
> the US Digital ones.  And they fit better.
>
>
>
> > -Original Message-
> > From: andrew beck [mailto:andrewbeck0...@gmail.com]
> > Sent: June-09-21 12:36 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] CUI devices
> >
> > For what is lts worth you can get a 2500ppr encoder for 30usd from my
> servo
> > supplier.
> >
> > Or a a 5000ppr.
> >
> > Or you can go absolute.  And get a 13 something ppr encoder.  They
> are
> > about 70usd I think
> >
> > I think it's 17bit.  But would have to check
> >
> > On Thu, Jun 10, 2021, 7:31 AM Sam Sokolik < 
> samco...@gmail.com> wrote:
> >
> > > in the datasheet the
> > > accuracy 0.2 degrees
> > >
> > > so, in my mind, it is no better than a 1800 count encoder if that..   I
> > > have used them in the past - they work ok for things like spindle
> > > feedback.   In my experience - for servo positioning feedback - it is
> too
> > > noisy..
> > >
> > >  
> https://www.youtube.com/watch?v=8RWqHW2AtrA
> > >
> > >
> > >
> > > On Wed, Jun 9, 2021 at 11:50 AM Roland Jollivet <
> roland.jolli...@gmail.com
> > > >
> > > wrote:
> > >
> > > > Hi
> > > >
> > > > I was wondering what experience people have had with the CUI
> encoders.
> > > >
> > > > Mostly looking at the costs. The AMT13 series comes as a kit with
> all the
> > > > adapters, at $33
> > > > But it's supplied with no female connector. You might only realise
> this
> > > > when you open the box, after paying for shipping, duties and
> customs.
> > > >
> > > > So you try finding a mating connector, and they're fairly obscure,
> but be
> > > > sure to order some pins too, otherwise you just get the plastic
> shell !
> > > >
> > > > Alternatively buy a ready cable from CUI (Digikey) for your encoder
> at
> > > $25
> > > > !
> > > >
> > > > It all sounds like a really shitty deal to me.
> > > > (a friends experience..)
> > > >
> > > > Roland
> > > >
> > > >
> > > >
> > > >
> > > >
> > >  <
> https://www.digikey.com/en/products/detail/cui-devices/AMT132S-V/10269185?WT.z_cid=ref_neda_dkc_buynow_cuidevices_source=ecia_medium=aggregator_campaign=cuidevices>
> https://www.digikey.com/en/products/detail/cui-devices/AMT132S-
>  <
> https://www.digikey.com/en/products/detail/cui-devices/AMT132S-V/10269185?WT.z_cid=ref_neda_dkc_buynow_cuidevices_source=ecia_medium=aggregator_campaign=cuidevices>
> >
> V/10269185?WT.z_cid=ref_neda_dkc_buynow_cuidevices_source=ecia_medium=aggregator_campaign=cuidevice
>  <
> https://www.digikey.com/en/products/detail/cui-devices/AMT132S-V/10269185?WT.z_cid=ref_neda_dkc_buynow_cuidevices_source=ecia_medium=aggregator_campaign=cuidevices>
> > s
> > > >
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> Emc-users@lists.sourceforge.net
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