Dynomotion

Group: DynoMotion Message: 5817 From: Toby Rule Date: 10/19/2012
Subject: Current segment

Hello,

 

Is there a way to get the current segment being processed in KMotion.NET API?  I know I can get the last segment in the buffer, but I want to get the actual segment being operated on by the motion controller.

 

Several years ago, when I was working with the C++ API, I remember that I achieved this result by getting the last segment in the buffer, the time in the buffer, and the elapsed time for previous segments (I think I had to modify GCodeInterpreter to expose the time per segment properties), and worked backwards to get to the current segment.  At least I think that’s what I did…  To do the same thing in KMotion.net, it appears I would have to modify the API. 

 

Right now I’m using the real-time position and direction of motion to search the tool path and find the current segment.  This isn’t always very reliable, however, especially when segments overlap.

 

Regards,

 

Toby

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Group: DynoMotion Message: 5893 From: Toby Rule Date: 10/25/2012
Subject: Re: Current segment

Hello,

 

I would be very grateful for any comments on this issue.

 

Regards,

 

Toby

 

From: DynoMotion@yahoogroups.com [mailto:DynoMotion@yahoogroups.com] On Behalf Of Toby Rule
Sent: Friday, October 19, 2012 9:46 AM
To: DynoMotion@yahoogroups.com
Subject: [DynoMotion] Current segment

 

Hello,

Is there a way to get the current segment being processed in KMotion.NET API?  I know I can get the last segment in the buffer, but I want to get the actual segment being operated on by the motion controller.

Several years ago, when I was working with the C++ API, I remember that I achieved this result by getting the last segment in the buffer, the time in the buffer, and the elapsed time for previous segments (I think I had to modify GCodeInterpreter to expose the time per segment properties), and worked backwards to get to the current segment.  At least I think that’s what I did…  To do the same thing in KMotion.net, it appears I would have to modify the API. 

Right now I’m using the real-time position and direction of motion to search the tool path and find the current segment.  This isn’t always very reliable, however, especially when segments overlap.

Regards,

Toby

The information contained in this transmission is intended only for the person or entity
to which it is addressed and may contain II-VI Proprietary and/or II-VI Business Sensitive
material. If you are not the intended recipient, please contact the sender immediately
and destroy the material in its entirety, whether electronic or hard copy. You are
notified that any review, retransmission, copying, disclosure, dissemination or other
use of, or taking of any action in reliance upon this information by persons or entities 
other than the intended recipient is prohibited.
Group: DynoMotion Message: 5894 From: Tom Kerekes Date: 10/25/2012
Subject: Re: Current segment
Hi Toby,
 
Sorry I thought I replied to this already.  Yes that is the only way I know of to do this:  Request the Amount of Motion Time executed from KFLOP then work backwards in the active circular Trajectory Planner buffer Starting at the total SegsDoneTime[index] to find the corresponding segment.  There is probably some multi-thread issues since your search Thread would be different from the Interpreter Thread that is changing the buffer, pointers, and times.  There is an example in the CheckMotionHalt function in CoordMotion, but it only does this after a halt and the buffer stops changing and by the same Interpreter Thread so there are no multi-thread issues in that case.  I suppose the solution would have to be mutex protect all accesses to the buffer pointers and times.  If you find a way to modify the .NET API to make this possible we would certainly incorporate your changes.
 
Regards
TK

Group: DynoMotion Message: 5905 From: Toby Rule Date: 10/26/2012
Subject: Re: Current segment

Hi Tom,

 

Thanks for the reply.  Searching the tool-path geometry will probably get the job done, at least for the first version.  I appreciate the tip on thread-safety.   If/when I resort to modifying KMotion.NET, then I’ll send you a patch.

 

Regards,

 

Toby

 

From: DynoMotion@yahoogroups.com [mailto:DynoMotion@yahoogroups.com] On Behalf Of Tom Kerekes
Sent: Thursday, October 25, 2012 5:41 PM
To: DynoMotion@yahoogroups.com
Subject: Re: [DynoMotion] RE: Current segment

 

 

Hi Toby,

 

Sorry I thought I replied to this already.  Yes that is the only way I know of to do this:  Request the Amount of Motion Time executed from KFLOP then work backwards in the active circular Trajectory Planner buffer Starting at the total SegsDoneTime[index] to find the corresponding segment.  There is probably some multi-thread issues since your search Thread would be different from the Interpreter Thread that is changing the buffer, pointers, and times.  There is an example in the CheckMotionHalt function in CoordMotion, but it only does this after a halt and the buffer stops changing and by the same Interpreter Thread so there are no multi-thread issues in that case.  I suppose the solution would have to be mutex protect all accesses to the buffer pointers and times.  If you find a way to modify the .NET API to make this possible we would certainly incorporate your changes.

 

Regards

TK

 

From: Toby Rule <trule@...>
To: "DynoMotion@yahoogroups.com" <DynoMotion@yahoogroups.com>
Sent: Thursday, October 25, 2012 1:45 PM
Subject: [DynoMotion] RE: Current segment

 

Hello,

 

I would be very grateful for any comments on this issue.

 

Regards,

 

Toby

 

From: DynoMotion@yahoogroups.com [mailto:DynoMotion@yahoogroups.com] On Behalf Of Toby Rule
Sent: Friday, October 19, 2012 9:46 AM
To: DynoMotion@yahoogroups.com
Subject: [DynoMotion] Current segment

 

Hello,

Is there a way to get the current segment being processed in KMotion.NET API?  I know I can get the last segment in the buffer, but I want to get the actual segment being operated on by the motion controller.

Several years ago, when I was working with the C++ API, I remember that I achieved this result by getting the last segment in the buffer, the time in the buffer, and the elapsed time for previous segments (I think I had to modify GCodeInterpreter to expose the time per segment properties), and worked backwards to get to the current segment.  At least I think that’s what I did…  To do the same thing in KMotion.net, it appears I would have to modify the API. 

Right now I’m using the real-time position and direction of motion to search the tool path and find the current segment.  This isn’t always very reliable, however, especially when segments overlap.

Regards,

Toby

The information contained in this transmission is intended only for the person or entity
to which it is addressed and may contain II-VI Proprietary and/or II-VI Business Sensitive
material. If you are not the intended recipient, please contact the sender immediately
and destroy the material in its entirety, whether electronic or hard copy. You are
notified that any review, retransmission, copying, disclosure, dissemination or other
use of, or taking of any action in reliance upon this information by persons or entities 
other than the intended recipient is prohibited.