Dynomotion

Group: DynoMotion Message: 12068 From: ‪steve wayne‬ ‪ Date: 8/6/2015
Subject: unreliable behavior
Hi Tom,
I've sent this email some days ago:

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We've set up a KFlop and a Kanalog on a small CNC and it works well. But some times in the middle of executing a G-Code, when I push the pause button on KMotionCNC screen, Z axis suddenly moves to a random position and causes fault. Once it's happened to X axis. We use version 4.33L. We don't know what is the problem. Would you please give us some hints so that we might be able to fix it.
We are going to set up KFlop and KAnalog on a big CNC and this unreliable behavior really made us worry and uncertain about doing this.
For more details, we don't have any problem on manual jogging or during step response tuning.
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As you noticed we installed the patch you've suggested. But we still have the same problem. We tried version 4.32 and 4.33L, M, N but the problem exist again. We changed the PC either, but no any good results.
Let me explain the conditions, the CNC that we're working on is a small one. It doesn't have a good earthing and it has old servo drives. We're testing KFlop and KAnalog on it, later we're going to install the control on a pretty big CNC so it is extremely important to be sure about the reliable behavior and to find out the results of these kind of problems. So any hints that would help us to overcome the problem, please let's know about it.

Regards
Steve
Group: DynoMotion Message: 12070 From: Tom Kerekes Date: 8/6/2015
Subject: Re: unreliable behavior
Hi Steve,

You didn't seem to respond to my response to your other Thread here:

Can you give more details?  Post your settings.  Any steps we might be able to do to reproduce the problem?  Is the unwanted motion a controlled motion?  Or is it uncontrolled and with a following error fault?  What is your Max Following Error settings?

Regards
TK

Group: DynoMotion Message: 12072 From: ‪steve wayne‬ ‪ Date: 8/6/2015
Subject: Re: unreliable behavior
Hi Tom,
I didn't have any action configured under KMotionCNC | Tool Setup | M0-M30 | Halt.
what kind of action do I have to configure? do I have to handle possible errors or faults some where?
The motion is not a controlled motion. it causes fault.
The max following error is set on 1000.
Does the "max following error" affects the accuracy of milling? How should I find the best setting for that?

regards,
steve

From: "Tom Kerekes tk@... [DynoMotion]" <DynoMotion@yahoogroups.com>
To: "DynoMotion@yahoogroups.com" <DynoMotion@yahoogroups.com>
Sent: Thursday, 6 August 2015, 23:50:58
Subject: Re: [DynoMotion] unreliable behavior

 
Hi Steve,

You didn't seem to respond to my response to your other Thread here:

Can you give more details?  Post your settings.  Any steps we might be able to do to reproduce the problem?  Is the unwanted motion a controlled motion?  Or is it uncontrolled and with a following error fault?  What is your Max Following Error settings?

Regards
TK



Group: DynoMotion Message: 12073 From: ‪steve wayne‬ ‪ Date: 8/7/2015
Subject: Re: unreliable behavior
I attached the parameters here. take a look to the attachments please.

From: "‪steve wayne‬ ‪ stevewaynecnc@... [DynoMotion]" <DynoMotion@yahoogroups.com>
To: "DynoMotion@yahoogroups.com" <DynoMotion@yahoogroups.com>
Sent: Friday, 7 August 2015, 9:47:30
Subject: Re: [DynoMotion] unreliable behavior

 
Hi Tom,
I didn't have any action configured under KMotionCNC | Tool Setup | M0-M30 | Halt.
what kind of action do I have to configure? do I have to handle possible errors or faults some where?
The motion is not a controlled motion. it causes fault.
The max following error is set on 1000.
Does the "max following error" affects the accuracy of milling? How should I find the best setting for that?

regards,
steve



Group: DynoMotion Message: 12074 From: Tom Kerekes Date: 8/7/2015
Subject: Re: unreliable behavior
Hi Steve,

You don't need to configure any action for Halt.  I thought you might have had some problematic action configured causing the issue.

The Max Following Error should be set to a value slightly larger than the maximum following error that occurs under normal circumstances.  In this way if something abnormal happens and creates a larger following error the axis will disable.  The Max Following Error has no effect on the accuracy of milling.  It only affects when the axes are disabled.  You can observe typical following errors using the Step Response Screen.  Have you done this?

I haven't heard of anyone having this issue in any of those Versions.  To give us the best chance of understanding the issue you would need to answer our questions, post all your settings, describe in detail what you are doing, and describe what happens in detail.

Halt should only provide an immediate FeedHold, then after the Feedhold the GCode should be halted, and then the FeedHold is released.  The only thing I can think of is that the rate of stopping is too high for your system causing a fault.  The rate of stopping from a FeedHold is based on your KFLOP Velocity, Acceleration, and Jerk settings.  Do you understand what those are?  Have you verified those are set properly for your system?   

Regards
TK




From: "‪steve wayne‬ ‪ stevewaynecnc@... [DynoMotion]" <DynoMotion@yahoogroups.com>
To: "DynoMotion@yahoogroups.com" <DynoMotion@yahoogroups.com>
Sent: Thursday, August 6, 2015 11:17 PM
Subject: Re: [DynoMotion] unreliable behavior

 
Hi Tom,
I didn't have any action configured under KMotionCNC | Tool Setup | M0-M30 | Halt.
what kind of action do I have to configure? do I have to handle possible errors or faults some where?
The motion is not a controlled motion. it causes fault.
The max following error is set on 1000.
Does the "max following error" affects the accuracy of milling? How should I find the best setting for that?

regards,
steve