VMC related HAL questions.
12 Jun 2015 03:47 #59728
by thewho
Replied by thewho on topic VMC related HAL questions.
Actually watched your video today 
I can't really tell you how good it needs to be because I don't know yet 
A real servo motor+drive is not an option, well if I stumble upon one at a good price sure but that is not very likely..
Shipping on those things is not fun
I can't really tell you how good it needs to be because I don't know yet A real servo motor+drive is not an option, well if I stumble upon one at a good price sure but that is not very likely..
Shipping on those things is not fun
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12 Jun 2015 04:09 #59731
by andypugh
Try ebay.de. Servo motors there seem to settle at about €50. Drives are a bit more. Finding a pair might be a fun puzzle.
If you have already seen my video, don't be too discouraged. That's a 1980s VFD.
Replied by andypugh on topic VMC related HAL questions.
A real servo motor+drive is not an option, well if I stumble upon one at a good price sure but that is not very likely..
Shipping on those things is not fun
Try ebay.de. Servo motors there seem to settle at about €50. Drives are a bit more. Finding a pair might be a fun puzzle.
If you have already seen my video, don't be too discouraged. That's a 1980s VFD.
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12 Jun 2015 04:09 #59732
by andypugh
Replied by andypugh on topic VMC related HAL questions.
A real servo motor+drive is not an option, well if I stumble upon one at a good price sure but that is not very likely..
Shipping on those things is not fun
Try ebay.de. Servo motors there seem to settle at about €50. Drives are a bit more. Finding a pair might be a fun puzzle.
If you have already seen my video, don't be too discouraged. That's a 1980s VFD and a 100-tooth encoder.
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17 Jul 2015 17:30 #60673
by thewho
Replied by thewho on topic VMC related HAL questions.
Some time has passed and some parts has been made but now I'm back with all my questions 
The thing that bugs me the most at the moment is the time it takes for the spindle to slow down.
So I would like to have "spinena" go low when M5 is called and the spindle turns slower than say 100rpm. Because then the spindle drive will brake the spindle. Otherwise it just coast to a stop witch takes quite some time from 5krpm.
Here you can find some videos of the parts I'm making:
www.youtube.com/user/lkjdangld/videos
The thing that bugs me the most at the moment is the time it takes for the spindle to slow down.
So I would like to have "spinena" go low when M5 is called and the spindle turns slower than say 100rpm. Because then the spindle drive will brake the spindle. Otherwise it just coast to a stop witch takes quite some time from 5krpm.
Here you can find some videos of the parts I'm making:
www.youtube.com/user/lkjdangld/videos
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17 Jul 2015 18:30 #60681
by thewho
Replied by thewho on topic VMC related HAL questions.
Crap, I forgot to attach the hal file 
There is no good reason for it, I just thought it was good to have some "play" because the spindle slows down almost instantly from that anyway.
Is it possible to automatically do an M19 (orient) after every spindle stop? Or do I have to add that in the g-code?
There is no good reason for it, I just thought it was good to have some "play" because the spindle slows down almost instantly from that anyway.
Is it possible to automatically do an M19 (orient) after every spindle stop? Or do I have to add that in the g-code?
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17 Jul 2015 21:05 #60688
by thewho
Replied by thewho on topic VMC related HAL questions.
If I do an M19 at 1000rpm and above the spindle decelerates quickly and then starts oscillating violently 
Tried it at 500rpm and that worked good.
Tried it at 500rpm and that worked good.
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17 Jul 2015 22:15 #60692
by andypugh
That's a typical PID tuning thing. You could probably reduce the gains to stop that, but then it wouldn't be as good when stopped / slow.
Replied by andypugh on topic VMC related HAL questions.
If I do an M19 at 1000rpm and above the spindle decelerates quickly and then starts oscillating violently
That's a typical PID tuning thing. You could probably reduce the gains to stop that, but then it wouldn't be as good when stopped / slow.
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20 Jul 2015 03:40 #60766
by sspeed33317
Replied by sspeed33317 on topic VMC related HAL questions.
Hi Andy.
June and July were busy.. managed to get everything moved again. Hope to get back to work on the HAAS
in a few weeks. The shop is a mess , waiting to get a pallet rack to get everything off the floor and organized.
We are going to get this carousel working !!!
June and July were busy.. managed to get everything moved again. Hope to get back to work on the HAAS
in a few weeks. The shop is a mess , waiting to get a pallet rack to get everything off the floor and organized.
We are going to get this carousel working !!!
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