[Emc-users] Servo tuning MESA 7i48 cards

2013-01-27 Thread Marshland Engineering
I'm running Colpey servo drives but I cannot get them tuned in with LinuxCNC. The servo is a current drive with a +- 10 volt input. As there is not much load on the drive so a +-0.4 volt will swing the motor at full speed. The manual for the drive says to supply a stepped input to it and tune t

Re: [Emc-users] Servo tuning MESA 7i48 cards

2013-01-27 Thread Anders Wallin
The servo is a current drive with a +- 10 volt input. > As there is not much load on the drive so a +-0.4 volt will swing the motor > at full speed. > Tuning with no load at all might be hard or impossible. Do you have the motors attached to the ballscrew/machine? Full speed at 0.4V command would

Re: [Emc-users] Servo tuning MESA 7i48 cards

2013-01-27 Thread TJoseph Powderly
On 01/27/2013 03:24 AM, Marshland Engineering wrote: > I'm running Colpey servo drives but I cannot get them tuned in with > LinuxCNC. > > The servo is a current drive with a +- 10 volt input. > As there is not much load on the drive so a +-0.4 volt will swing the motor > at full speed. > > The man

Re: [Emc-users] Servo tuning MESA 7i48 cards

2013-01-27 Thread Peter C. Wallace
On Sun, 27 Jan 2013, Marshland Engineering wrote: > Date: Sun, 27 Jan 2013 22:24:03 +1300 > From: Marshland Engineering > Reply-To: "Enhanced Machine Controller (EMC)" > > To: emc-users@lists.sourceforge.net > Subject: [Emc-users] Servo tuning MESA 7i48 cards &

Re: [Emc-users] Servo tuning MESA 7i48 cards

2013-01-27 Thread Jon Elson
Anders Wallin wrote: > The servo is a current drive with a +- 10 volt input. > ^ >> As there is not much load on the drive so a +-0.4 volt will swing the motor >> at full speed. >> >> > > Tuning with no load at all might be hard or impossible. D

Re: [Emc-users] Servo tuning MESA 7i48 cards

2013-01-27 Thread Marshland Engineering
Can you tell me what your PID values you have in your setup? I know mine won't bet the same but it gives me an idea on the range. Thanks Wallace -- Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, M

Re: [Emc-users] Servo tuning MESA 7i48 cards

2013-01-27 Thread Peter C. Wallace
On Sun, 27 Jan 2013, Jon Elson wrote: > Date: Sun, 27 Jan 2013 11:59:22 -0600 > From: Jon Elson > Reply-To: "Enhanced Machine Controller (EMC)" > > To: "Enhanced Machine Controller (EMC)" > Subject: Re: [Emc-users] Servo tuning MESA 7i48 cards >

Re: [Emc-users] Servo tuning MESA 7i48 cards

2013-01-27 Thread Chris Morley
> From: marshl...@marshland.co.nz > To: emc-users@lists.sourceforge.net > Date: Mon, 28 Jan 2013 08:10:21 +1300 > Subject: Re: [Emc-users] Servo tuning MESA 7i48 cards > > Can you tell me what your PID values you have in your setup? I know mine > won't bet the same

Re: [Emc-users] Servo tuning MESA 7i48 cards

2013-01-27 Thread Jon Elson
Peter C. Wallace wrote: > If the drives are indeed in torque mode (which is hard to reconcile with > tuning the drives step response via a potentiometer), It may be very hard to > tune a bare unloaded motor at a linuxCNC 1 KHz sample rate (~300 hz bandwidth) > You're right. If he THINKS the s

Re: [Emc-users] Servo tuning MESA 7i48 cards

2013-01-27 Thread TJoseph Powderly
On 01/27/2013 03:24 AM, Marshland Engineering wrote: > I'm running Colpey servo drives but I cannot get them tuned in with > LinuxCNC. > > The servo is a current drive with a +- 10 volt input. > As there is not much load on the drive so a +-0.4 volt will swing the motor > at full speed. > > The man

Re: [Emc-users] Servo tuning MESA 7i48 cards

2013-01-28 Thread Marshland Engineering
Thanks for the replies Month end so I'm busy finishing jobs at the moment !!! The motor is attached to a ballscrew and encoder. Currecntly I only running 25 volts and the motor turns at approx 300 rpm full speed. The servo is set to current mode and the maximum current is 10 amps. Currently on