Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

There is a much smaller CNC mill ( with 4th axis, I think) for sale on Public Surplus. As of today it is listed at $355. Akron, Ohio. http://www.publicsurplus.com/sms/uakron,oh/auction/view?auc=1528956 On Tuesday, January 26, 2016 11:35 PM, Dave Cole wrote:

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On 1/26/2016 11:47 AM, andy pugh wrote: > On 26 January 2016 at 07:00, Dave Cole wrote: >> If Siemens can't get standard AC squirrel cage motors to position >> precisely, I doubt that anyone can. > They can't with standard induction motors. But induction servo motors > do

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On 26 January 2016 at 07:00, Dave Cole wrote: > If Siemens can't get standard AC squirrel cage motors to position > precisely, I doubt that anyone can. They can't with standard induction motors. But induction servo motors do exist and Siemens make them:

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

Man I need you to come over here to my shop and show me how to do it on my Cincinnati Arrow 500 LOL. I am not sure really what sort of motor it has but it has been working for some time now with my Hitachi wj200-110LF sensorless vector drive. Spindle orient is the only thing keeping me from a

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

I used to work for Siemens. True, you can servo any motor, but whether it can be an effective positioning drive is really the question. It all comes down to how precise you need to be able to position the drive. We would have loved to have servo'ed standard 3 phase AC induction motors for

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

01/24/2016 11:55 PM, Gene Heskett rašė: > On Sunday 24 January 2016 16:30:45 Marius Alksnys wrote: > >> 01/24/2016 04:37 PM, Dave Cole rašė: >>> Is the positioning ability adequate? >> >> I am impressed how strong it holds in position even when fed with DC >> current (freq = 0). I can't force it

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On Monday 25 January 2016 13:29:35 John Kasunich wrote: > On Mon, Jan 25, 2016, at 01:23 PM, Gene Heskett wrote: > > Now if Marius can clarify by asking the driver to go 5 rpm, and > > getting 5 rpm exactly. Or driving it temporarily with line frequency > > power while watching it under

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On Mon, Jan 25, 2016, at 02:17 PM, Gene Heskett wrote: > Even unloaded, the slippage is usually north of 20 rpm & quite visible. Guess that depends on the motor. Modern industrial size (1HP and up) three-phase high efficiency induction motors often have rated speeds of 1780 or 1785 RPM,

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On Monday 25 January 2016 12:56:41 John Kasunich wrote: > On Mon, Jan 25, 2016, at 12:37 PM, Gene Heskett wrote: > > On Monday 25 January 2016 08:00:12 Marius Alksnys wrote: > > > 01/24/2016 11:55 PM, Gene Heskett rašė: > > > > On Sunday 24 January 2016 16:30:45 Marius Alksnys wrote: > > > >>

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On Monday 25 January 2016 08:00:12 Marius Alksnys wrote: > 01/24/2016 11:55 PM, Gene Heskett rašė: > > On Sunday 24 January 2016 16:30:45 Marius Alksnys wrote: > >> 01/24/2016 04:37 PM, Dave Cole rašė: > >>> Is the positioning ability adequate? > >> > >> I am impressed how strong it holds in

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On Mon, Jan 25, 2016, at 01:23 PM, Gene Heskett wrote: > > Now if Marius can clarify by asking the driver to go 5 rpm, and getting 5 > rpm exactly. Or driving it temporarily with line frequency power while > watching it under flourescent lighting. If the blur is stationary, it > is a

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On Mon, Jan 25, 2016, at 12:37 PM, Gene Heskett wrote: > On Monday 25 January 2016 08:00:12 Marius Alksnys wrote: > > > 01/24/2016 11:55 PM, Gene Heskett rašė: > > > On Sunday 24 January 2016 16:30:45 Marius Alksnys wrote: > > >> 01/24/2016 04:37 PM, Dave Cole rašė: > > >>> Is the positioning

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

No mixup. I used to work for GE (and Hughes) designing AC induction drives for mostly traction applications. You can servo **ANY** induction motor. The only limit to frequency response is the inductance and that can be solved with high enough bus voltage (DC motors and steppers have the exact

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On Monday 25 January 2016 14:48:49 John Kasunich wrote: > On Mon, Jan 25, 2016, at 02:17 PM, Gene Heskett wrote: > > Even unloaded, the slippage is usually north of 20 rpm & quite > > visible. > > Guess that depends on the motor. > > Modern industrial size (1HP and up) three-phase high efficiency

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On 24.01.16 12:15, Gene Heskett wrote: > In my case, making that very slow to lock position part of the m5 command > would be one way to stop it quickly as Jon's servo driver, with my > current PID settings, can take it from 2700 to 25 rpm in a very small > fraction of a second. All I hear is a

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

and in orientation / position mode I_out is constant and f_out is controlled by PID. -- Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

Is the positioning ability adequate? Most squirrel cage motors are really bad at positioning under load as they rely on slip to generate armature flux. No slip -> no flux -> no torque But you are just trying to position the tool for the changer, right? The best I have seen for positioning

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

The positioning ability of an induction motor is no different to that of a DC servo motor. When no torque is needed both go to zero voltage/current to stop moving (though technically an induction motor can maintain a DC current if it chooses to to provide braking - similar to shorting out the DC

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On Sunday 24 January 2016 10:56:28 Stephen Dubovsky wrote: > The positioning ability of an induction motor is no different to that > of a DC servo motor. When no torque is needed both go to zero > voltage/current to stop moving (though technically an induction motor > can maintain a DC current

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On Sunday 24 January 2016 16:30:45 Marius Alksnys wrote: > 01/24/2016 04:37 PM, Dave Cole rašė: > > Is the positioning ability adequate? > > I am impressed how strong it holds in position even when fed with DC > current (freq = 0). I can't force it to rotate by hand, while it is > very easy

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

01/24/2016 04:37 PM, Dave Cole rašė: > Is the positioning ability adequate? I am impressed how strong it holds in position even when fed with DC current (freq = 0). I can't force it to rotate by hand, while it is very easy rotating while turned off. I did not implement any ramp there yet, just

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

Thank you Andy! I tried and analysed vismach/vmc_toolchange config. However, I am planning to make substantial changes. Yes, this config will help me, but there are several issues not covered: 1. Comments from remapped M6 toolchange.ngc subroutine: ; This assumes that the carousel is already

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

Spindle motor is, as written on the nameplate, High-performance induction motor - or three phase asynchronous motor in other words. As drive power stage takes two analog voltages as phase current commands (third one is "calculated" inside), I am feeding them with sine signals, calculated by

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

excellent man did you get the toolchanger working as well? That is what mine is lacking. My machine is a 1997 Cincinatti Arrow 500 VMC. Pete On Sat, Jan 23, 2016 at 12:06 PM, Marius Alksnys wrote: > I am planning to finish to retrofit Cincinnati Arrow 750 with

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

I coded and tested spindle orientation and tool carousel control this week. I implemented a lot of checks here, as I learned something from severely damaged original carousel, which will be replaced when testing will be complete :) Now I am coding tool change: Z movements, pneumatic valves,

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

> On 23 Jan 2016, at 17:43, Pete Matos wrote: > > I have to find a good way to orient spindle now before I can proceed > further. Good luck man. The spindle.hal file from vismach/vmc_toolchange ought to pretty much just slot in.

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

> On 23 Jan 2016, at 17:55, Marius Alksnys wrote: > > As drive power stage takes two analog voltages as phase current commands > (third one is "calculated" inside), I am feeding them with sine signals, > calculated by custom HAL component, using 7i77 analog output

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

yup mine has everything original implemented already and all is working but I have to find a good way to orient spindle now before I can proceed further. Good luck man. Pete On Sat, Jan 23, 2016 at 12:38 PM, Marius Alksnys wrote: > I coded and tested spindle

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

Interesting. Are the two sine waves being fed to the drive 120 degrees out of phase or something similar? So does the sine wave amplitude ramp up according the motor speed? Dave On 1/23/2016 12:55 PM, Marius Alksnys wrote: > Spindle motor is, as written on the nameplate, High-performance >

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

I am planning to finish to retrofit Cincinnati Arrow 750 with LinuxCNC in several weeks completely. This includes hacked VFS spindle drive for 9kW 10kRPM spindle and automatic tool changer. I did not succeed to revive VFS to its original state, so I chose very strange way - to hack it and

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

Are you using an encoder to commutate the motor? Or just firing the windings in order? Is the original motor a regular induction motor or some brushless AC, brushless DC motor variant ? Dave On 1/23/2016 12:06 PM, Marius Alksnys wrote: > I am planning to finish to retrofit Cincinnati Arrow

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

That's nice! :-) Dave On 1/23/2016 4:48 PM, Marius Alksnys wrote: > 01/23/2016 08:39 PM, Dave Cole rašė: >> Interesting. >> >> Are the two sine waves being fed to the drive 120 degrees out of phase >> or something similar? >> >> So does the sine wave amplitude ramp up according the motor speed?

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

01/23/2016 08:39 PM, Dave Cole rašė: > Interesting. > > Are the two sine waves being fed to the drive 120 degrees out of phase > or something similar? > > So does the sine wave amplitude ramp up according the motor speed? > > Dave Yes, 120 degrees. In spin / velocity mode amplitude I_out is

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

Hello Wayde, Here is a 1984 Cincinnati Milacron 10VC-1000 that I just finished, it has a siemens package in it. https://youtu.be/JINL4n-A4D0 Here is another link, http://forum.linuxcnc.org/forum/show-your-stuff/29904-1984-cincinnati-milacron-vmc-with-4th-axis One of the guys using Linuxcnc,

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On Wednesday 13 January 2016 12:26:23 Wayde Allen wrote: > I just joined the email list since I'm wondering about using Linux CNC > to retrofit the control system on an old Cincinnati/Milacron CNC > system. I think Stuart Stevenson may have some suggestions, his Cinci makes very precise

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

I guess I should dig out the schematics for our machine, but I don't believe it would be anything special, other than the resolver feedback out of the drive to the control, I am not sure they have resolver feedback out of the drive, or if they were tying in parallel to the drive for the

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

Aaaa, most of these style machines, I have always seen the kollmorgen's on. They did use a mixed bag though of controls and motors/drives on these machines. Rick On 1/13/2016 4:05 PM, Pete Matos wrote: >I have a Cincinatti Arrow 500 VMC that I have retrofit. It runs on > linuxCNC of

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

I have a Cincinatti Arrow 500 VMC that I have retrofit. It runs on linuxCNC of course and it works quite well altho I am still not using the toolchanger yet it is not implemented thus far. However it runs almost daily when I have work for it and has been very reliable. It had the emerson control

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

Hello Wayde There is a guy on here, Pete Matos, that has a Cinci VMC that most likely has the kollmorgen package on, we have an identical mill to his, but ours still has the A2100 control on it. Here is our older, 1984, Cinci, using siemens motors, with some video of it in action.

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On Wed, Jan 13, 2016, at 01:26 PM, Gene Heskett wrote: > I think Stuart Stevenson may have some suggestions, his Cinci makes very > precise locomotive parts, and has been rumored to have made earthquakes > when a servo oscillated during the calibration. ;-) Airplane parts, not locomotive.

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On 01/13/2016 11:26 AM, Wayde Allen wrote: > I just joined the email list since I'm wondering about using Linux CNC to > retrofit the control system on an old Cincinnati/Milacron CNC system. The > motor control amplifier for these machines seems to be a Kollmorgen BDS4. > Has anyone here created

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On Wednesday 13 January 2016 14:45:51 John Kasunich wrote: > On Wed, Jan 13, 2016, at 01:26 PM, Gene Heskett wrote: > > I think Stuart Stevenson may have some suggestions, his Cinci makes > > very precise locomotive parts, and has been rumored to have made > > earthquakes when a servo oscillated

[Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

I just joined the email list since I'm wondering about using Linux CNC to retrofit the control system on an old Cincinnati/Milacron CNC system. The motor control amplifier for these machines seems to be a Kollmorgen BDS4. Has anyone here created an interface to one of these? Is Linux CNC a decent

Re: [Emc-users] LinuxCNC for retrofit of Cincinnati Milacron CNC?

On 13 January 2016 at 17:26, Wayde Allen wrote: > I just joined the email list since I'm wondering about using Linux CNC to > retrofit the control system on an old Cincinnati/Milacron CNC system. LinuxCNC has been controlling at least one Cincinnati mill for several years.