[Emc-users] mesa card choice and config

Hi, I may have a nice project of retrofitting a lathe (about 20kW, quite a nice toy, but with an old control that is dead) I tested servo driver, they work. So basicely, all I need is: - 3 output +- 10V (to give speed consign to servo amplifier) - 4 quadrature input encoder (I checked this,

Re: [Emc-users] mesa card choice and config

On 21 January 2016 at 16:53, Claude Froidevaux wrote: > I would also love to have analog input on MESA card, but this does not > seems to exist. anyone to confirm ? Some of the smart-serial cards offer analogue input on some channels. > Idea is to use MESA 7I33TA for +-10V

Re: [Emc-users] mesa card choice and config

That is not true at all. LinuxCNC supports a fairly wide range of I/O devices. Jon Elson offers a line of products that we have drivers for. We also have drivers for a couple of older servo boards, but the manufacturers of those boards haven't been keeping up with the changes in the computer

Re: [Emc-users] mesa card choice and config

2016-01-21 18:53 GMT+02:00 Claude Froidevaux : > Hi, > > I may have a nice project of retrofitting a lathe (about 20kW, quite a > nice toy, but with an old control that is dead) > > I tested servo driver, they work. So basicely, all I need is: > > - 3 output +- 10V (to give

[Emc-users] mesa card choice and config

7i87 is a +-10vdc analog input card. Connects on the sserial connectors of say a 7i77. http://store.mesanet.com/index.php?route=product/product_id=126 There's at least 3 ways to use a 7i77. I think pci 5i25, pcie 6i25 and ethernet (7i80 or something close to that).

Re: [Emc-users] mesa card choice and config

I'm a little puzzled. Lately the discussion on servos and LinuxCNC appears to give the impression that the only solution is a PC and boards from Mesa. Does that mean LinuxCNC has now become a defacto Mesa product? Either stepper motors and an older PC that supports parallel port or if you

Re: [Emc-users] mesa card choice and config

On 21 January 2016 at 18:41, John Dammeyer wrote: > Either stepper motors and an older PC that supports parallel port or if you > want servos that aren't driven with a Gecko Step/Dir input (much like a > stepper motor) then it's a Mesa product or nothing? Not at all.

Re: [Emc-users] [Emc-developers] using an absolute encoder

On 21 January 2016 at 22:45, Stuart Stevenson wrote: > Gentlemen, > I desire to use an absolute encoder. > I will work that direction if someone will point me to a good starting > point. What sort of absolute encoder? What do you want to do with it? -- atp If you can't fix

[Emc-users] High Latency Before Updating 2.7

I hadn't seen this mentioned on the list, but maybe I missed it, or I read it and my old brain forgot. I had a few old used PCs that I purchased for LinuxCNC 2.5.x. I ran the latency test before buying them and the results were fairly good. Then I decided to standardize on Atom motherboards

Re: [Emc-users] [Emc-developers] using an absolute encoder

On 21 January 2016 at 23:23, Stuart Stevenson wrote: > I think a resolver would be the way to go. Possibly not enough resolution for a rotary table. Something like the Heidenhain angle encoders might be better, they turn up on eBay occasionally.

Re: [Emc-users] [Emc-developers] using an absolute encoder

Hi Andy, My definition of absolute encoder for this exercise is as follows: Given a rotary table of infinite rotations I want the encoder to count to 359.( depending on resolution) and the next position to be 0.000. The axis position of 90 degrees is always the same place. The sign +/-

Re: [Emc-users] mesa card choice and config

On 21 January 2016 at 22:26, claude wrote: > - This can be ethercat, as much as I know, there is no driver for > linuxcnc. Also, hardware is quite expensive. There is, but licensing problems mean that it can't be a part of LinuxCNC.

Re: [Emc-users] mesa card choice and config

Well, to give my understanding, To have a real time interface to physical world, there is the need to use some hardware. When you speak about hardware, you mean as well driver, and this start to be quite complicated. - This can be ethercat, as much as I know, there is no driver for linuxcnc.

[Emc-users] using an absolute encoder

Gentlemen, I desire to use an absolute encoder. I will work that direction if someone will point me to a good starting point. having some fun now Stuart -- Addressee is the intended audience. If you are not the addressee then my consent is not given for you to read this email furthermore it is

Re: [Emc-users] mesa card choice and config

On 01/21/2016 12:41 PM, John Dammeyer wrote: > I'm a little puzzled. > > Lately the discussion on servos and LinuxCNC appears to give the impression > that the only solution is a PC and boards from Mesa. Does that mean > LinuxCNC has now become a defacto Mesa product? > Well, I sure hope not!

Re: [Emc-users] 4 ton project?

I can't say for certain without knowing more about exactly what you have but Fanuc of that era should use ordinary encoders, fed directly to the control, the control then sends a synthetic analog tacho singnal and analog control signals back to the servo amps, which are fairly ordinary DC servo

[Emc-users] 4 ton project?

I just went to look at a '80s Bridgeport VMC with Heidenhain controller and Fanuc yellow cap servos (didn't get inside a cabinet for closer investigation - yet). The beast has a tool changer and a bad controller. Anyone have experience with that particular configuration? Particularly, what

Re: [Emc-users] [Emc-developers] using an absolute encoder

Heidenhain also sells absolute encoders that output SSI. I've used them before. They are expensive. As I recall $800-$900 for a rotary one. If they are wired wrong they can easily be destroyed... An electrician kept changing the wiring and destroyed two of them before I could intervene. He

Re: [Emc-users] using an absolute encoder

I've used the AS5048B in a robotics application. Note that the magnet must have a transverse magnetic orientation rather than the axial orientation of most rare earth magnets. > -Original Message- > From: Mark Johnsen [mailto:m...@ijohnsen.com] > Sent: Thursday, January 21, 2016 7:34 PM >

[Emc-users] There needs to be a 'Cliff notes' / The idiots guide to Smart Serial configurations.

Hello fellow users; Today I will ask for clarity in understanding Smart serial usage. >From the many docs I have read so far it appears to rule out SSerial as a >single point to point only interface and that the devices are somehow linked >via hub or a daisy chain. Which is it? I picked up a

Re: [Emc-users] High Latency Before Updating 2.7

On Thursday 21 January 2016 18:37:39 Bruce Layne wrote: > I hadn't seen this mentioned on the list, but maybe I missed it, or I > read it and my old brain forgot. > > I had a few old used PCs that I purchased for LinuxCNC 2.5.x. I ran > the latency test before buying them and the results were

[Emc-users] using an absolute encoder

http://ams.com/eng/Products/Position-Sensors/Magnetic-Rotary-Position-Sensors/AS5040 You can buy demo boards from digikey and I think they have versions up to 14bit (?). 12 bit for sure. Also, they have ABI output (channel a, channel b, and index) as well as pwm and ssi. Hmm, ABI wouldn't work

Re: [Emc-users] High Latency Before Updating 2.7

My friend speculated that maybe the updates that installed (over 60 MB worth of packages) included a different video driver that greatly decreased the latency problem and I commented that this seemed like a probable explanation based on my limited knowledge. The difference was extreme -

[Emc-users] C-Beam noise Re: High Latency Before Updating 2.7

On 1/21/2016 6:16 PM, Bruce Layne wrote: > BTW - If anyone is looking for a rigid little 12" X 12" desktop CNC > router, the C-Beam Machine from OpenBuild > The structure seemed rigid but the stepper motor sounds > seemed to be resonating in the aluminum frame and the resonant > frequencies were

Re: [Emc-users] C-Beam noise Re: High Latency Before Updating 2.7

Once I convinced my friend that the noise wasn't the result of some problem with the stepper motors and seemed to be greatly amplified at resonant frequencies, we quickly brainstormed a couple of fixes involving various extrusion fills and RTV silicone was at the top of our list. Great minds

Re: [Emc-users] mesa card choice and config

Thanks. I realize the question was about specific Mesa choices but at one point it was like "I have a servo, what Mesa card do I use?" Not stated was whether there were any options. Like "I have a servo, what's the best servo/encoder controller out there?" So I was curious. John >