Machsupport Forum
Third party software and hardware support forums. => Galil => Topic started by: Shivu on December 31, 2010, 11:26:16 AM
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Hi all,
I am facing trouble in displaying the speed of the Spindle in MACH3,
I have connected a encoder for the Spindle, and Assigned the Z axis for the Axis S in Galil Configuration and checked the Spindle has encoder Check box still the DRO is not displaying the actual speed of the spindle.
What could be the Problem?
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is the displayed index speed changing at all
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It displays the speed but its not showing feed back speed its showing the command speed.
I need to display the feed back speed, the galil is reading the encoder feedback.
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There is no problem. Typically, Mach commands the spindle to a certain value. If you set the spindle speed to 1000 RPM, then Mach expects the spindle speed to be 1000 RPM. There is no PID loop from Mach controlling the spindle for external motion plugins, so there is no need for RPM feedback.
Feedback from the galil is in counts because, after all, it reads an encoder. You could possibly write a brain to sample the counts of the spindle encoder and do the required math to calculate RPM based on your encoder counts per revolution. But that is a subject waaaaaay beyond the scope of this Galil forum.
Why do you need spindle speed feedback? If you just want to check that the spindle is doing the commanded speed, then put a tachometer on it temporarily.
Steve
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Hi steve,
I am new to use MACH3, i know how to write brian for the Digital Input outputs but i am not aware how to write it to display the speed of the Speed of the spindle.
Can you explain me.
Shivu
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Like I said, that subject is waaaay beyond the scope of this Galil support forum. You might try posting in the General forum and get some help. There are also video tutorials on Brains. But bear in mind, you are wanting to do what almost no one has wanted to do in the past. So there is not going to be a drop in solution. It may not even be possible.
I will try and put something in the plugin that will make it easier. But I'm really having trouble figuring out how I would get that information back to Mach. I might just have to place that information into a user DRO or something. But that will not be in the plugin until I get finished with the new API (no idea when at the moment). So it you want the RPM feedback sooner, then you will need to investigate other options.
Steve
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Hi Steave,
As you suggested i am using a proximity as index feedback for the Spindle.
I have connected it to the input #7 of the galil, and in the ports and pins configured the Index input to Port 1 and Pin 31. I am able to see the input toggle in the diagnostics as the sensor toggled.
Still there is no change in the Spindle speed display still it is showing the commanded speed only.
I am trying to do the treading in this lath, i am getting "Galil error 1: Unrecognized command" whenever the threading instruction is given(M32).
Where am i doing wrong.
Shivu.
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Shivu,
Single point threading is NOT implemented on Mach3 lathe yet in the Galil plugin. I have been working on it for some time, but it's still not ready. I will post when it is working.
Thanks,
Kenny
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Hi Kenny,
We are caught in an awkward position by the fact that Single point threading is not implemented in the Galil plugin of the Mach 3. We are in the process of commissioning a Galil+Mach3 for a lathe machine for a customer in India. Threading is an important capability of this machine. If threading cannot be demonstrated to the customer, we may have to call the project off. Can you help us by implementing single point threading asap? Its our mistake that we assumed that threading would be possible on the full release version of the Galil plugin for Mach3. We ought to have checked on the forum before committing to the customer
Shivu.
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Shivu,
I have been working on this for a long time. It is just not ready now, nor will it be very soon. I need it myself, so I wish that it was working. You will need to come up with another solution for now.
Kenny
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Hi Kenny,
I hope you understand my situation.
Kindly implement the plugin ASAP. or if you can give me some other solution which can help me at this situation to run the MACH3 for threading operation also OK for me.
Kindly do the needful.
Shivu.
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Shivu,
I hope you understand our situation. We develop the Galil plugin and GIVE it away. Kenny and I make no money what so ever with the Galil plugin. It's is not part of Mach. It is separate development effort that we did to use our Galil controllers with Mach. And we decided to offer it freely to others that may benefit from it.
Kenny and I want to implement threading. But it is not done nor will it be done anytime soon. We both have day jobs that take priority.
If you cannot wait for us to implement threading into the plugin, then I would suggest going with a dspMC (Vital Systems) to run your servos. His manual states that that threading is supported. But I can't speak to it's ability as I have never run with the dspMC unit. I would suggest contacting Vital systems to see if it will do what you need.
Otherwise, your threading options are limited to running stepper motors from the parallel port.
Steve