Author Topic: Problem with DSPMC v2 and respond time of the feed override G01 and G00  (Read 4672 times)

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Offline Guido

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Have a huge problem with the Vital  DSPMC v2  and respond time of the feed override G01 and G00 rapid traverse.
The DSMP of Vital is for CAM users with 3-D lines (G01) and many small lines (G01) very, very dangerous.

If high feed driven in 3D so it's dangerous!

I have 2 Potentiometer on the machine. One Potentiometer is for G01 and one for G00.

If you want to reduce the feed override, so it's a long time to respond to the feed.

If you get a new part on the machine, the feed will appeal depending on the buffer size very delayed.
G00 is also delayed at the same time.

I have 3 controllers DSPMC v2 from Vital and all have the same problem.

The buffer must be set to minimum 10-15% if you run 2 million lines of G01 with F2000-5000 mm feed. Otherwise stutters the axes.

Depending on the buffer size, and the lengths of the G01 lines. The axes reduce the speeds at few millimeters up to centimeters.
Crash is programmed.

I have now several crashes with milling tools. Now it's too much

How did you solve this problem, the response time of the feed rate and even 3D-milling at high speed?

I think that this problem needs to be solved. By Industrie Maschines is it so.
The response time is directly.

If the problem cannot be resolved, I need to search for new controllers.

Does anyone have experience with other controllers?

Sorry for my language
Thanks for your help and greetings from Switzerland

Guido

Offline Vital System Support

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Re: Problem with DSPMC v2 and respond time of the feed override G01 and G00
« Reply #1 on: August 26, 2012, 06:38:15 PM »
hi Guido,

It's a problem with mach3 connected to external motion controllers.  Any motion controller connected to mach3 will do this, it has to do with the 10hz update loop and the motion buffers on the mach3 side.

Mach4 should fix this problem compleatly, mach4 should run on a 100hz update loop and there will not be any motion buffers on the mach4 side.  So when the feed overide is change the next cycle loop the feedrate on the machine will change.

The feedhold should be instantaneous as it is done without any delay of motion buffer.

Please email to vitalsystem address and we will try do some more optimization on the motion buffer to make it more responsive.

thanks
Rufi



Offline Guido

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Re: Problem with DSPMC v2 and respond time of the feed override G01 and G00
« Reply #2 on: August 27, 2012, 02:48:16 AM »
Hello Ruffi,
thanks for your reply.
When will coming the MACH4? Will go for another year ?

I must say that the controller will run very well. 3D only with high feed rates, it is not  to control with this response time.

I have the latest plugin from you.

You have 10 Hz cycle update.
These are 0.1 sec update.
If that would feed override respond at this time. That would be very good.
You can not in the 0.1Sek. Cycles update the feed put before the buffer contents be executed

I hope you have a solution.
The controller is otherwise very good.

I hope to hear from you.

Greetings from Switzerland
Guido

E-Mail:      guido.herzog@bluewin.ch

Offline Vital System Support

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Re: Problem with DSPMC v2 and respond time of the feed override G01 and G00
« Reply #3 on: August 27, 2012, 06:47:27 PM »
hi Guido,

I just email you new set of plugin and firmware. 

dont know when mach4 start selling,  but should be few weeks or months.

regards,
Rufi


Offline Guido

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Re: Problem with DSPMC v2 and respond time of the feed override G01 and G00
« Reply #4 on: August 28, 2012, 12:23:20 PM »
Hello Rufi,
many thanks for the update.
I got it installed and running, on the first impression is very good.
The Machine run very well. The poti`s respond now faster.

I want to thank you very much for the good good service...very fast service!
Now 3d milling makes fun again

Thank you very much. :)

Greetings from Switzerland

Guido