Kool! Any chance to reduce the deceleration on the swing arm? Maybe a small shock absorber? Or use a servo :}
TK
| Group: DynoMotion |
Message: 5821 |
From: Lee Studley |
Date: 10/19/2012 |
| Subject: Re: It's Alive! It's Alive! (Insert Maniacal Laugh Here...) |
Agreed very cool, this mech. is similar
to my BostMatic toolchanger that I need to get to.
Maybe a Oil-piston damper at the end?
LPKF PCB board routers use one to lower the cutter in a
controlled way.
-Lee
On 10/19/2012 11:03 AM, Tom Kerekes wrote:
Kool! Any
chance to reduce the deceleration on the
swing arm? Maybe a small shock absorber? Or use a servo :}
TK
I just got my home-built carousel auto tool
changer sequencing under KFlop control for the first
time. Still lots to do, but it basically seems to
work very nicely. I can't wait to get it finished up
and in-service!
It's VERY brute force right now, running completely
open-loop, with just ( loooooong) delays to make sure
each step completes before the next is initiated.
When done, it should be well under 10 seconds per toolchange,
and have enough feedback to detect any possible
fault, and abort if anything goes wrong.
http://youtu.be/xPSgeAMuFC4
Regards,
Ray L.
|
|
| Group: DynoMotion |
Message: 5823 |
From: himykabibble |
Date: 10/19/2012 |
| Subject: Re: It's Alive! It's Alive! (Insert Maniacal Laugh Here...) |
Tom,
Yes. Right now it's very rude and crude. A shock, or even a spring, on the end should get rid of the rough "landing" when it parks. I actually want some "bump" when approaching the spindle, to ensure it seats completely.
Regards,
Ray L.
--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Kool! Any chance to reduce the deceleration on the swing arm? Maybe a small shock absorber? Or use a servo :}
> Â
> TK
>
> From: himykabibble <jagboy@...>
> To: DynoMotion@yahoogroups.com
> Sent: Friday, October 19, 2012 10:15 AM
> Subject: [DynoMotion] It's Alive! It's Alive! (Insert Maniacal Laugh Here...)
>
> Â
> I just got my home-built carousel auto tool changer sequencing under KFlop control for the first time. Still lots to do, but it basically seems to work very nicely. I can't wait to get it finished up and in-service!
>
> It's VERY brute force right now, running completely open-loop, with just (loooooong) delays to make sure each step completes before the next is initiated. When done, it should be well under 10 seconds per toolchange, and have enough feedback to detect any possible fault, and abort if anything goes wrong.
>
> http://youtu.be/xPSgeAMuFC4
>
> Regards,
> Ray L.
> |
|
| Group: DynoMotion |
Message: 5825 |
From: Tom Kerekes |
Date: 10/19/2012 |
| Subject: Re: It's Alive! It's Alive! (Insert Maniacal Laugh Here...) |
It isn't clear what type of cylinder you are using, but I have seen dual sided pistons used with a needle valve on the exaust side to control the speed of motion.
TK
| Group: DynoMotion |
Message: 5826 |
From: himykabibble |
Date: 10/19/2012 |
| Subject: Re: It's Alive! It's Alive! (Insert Maniacal Laugh Here...) |
Tom,
It's a standard double-acting cylinder, and I have flow control valves on both circuits to control speed in both directions. The geometry of the linkage is far from ideal - dictated by space constraints. To make matters worse, it has to swing 140 degrees - difficult to do with a simple arm. If I slow it down too much, it doesn't work properly. It, unfortunately, has to go slightly over-center at the quill end, and I need to have it moving as it approaches that point or it won't fully engage the quill reliably, as there's very little force available at that position, due to the geometry. At the other end, it's pulling almost perfectly tangential to the arm, so there is mega-force available there. I could improve it a lot with a more complex linkage, but I don't want the complication, unless I have no choice. Once fully "tweaked", I think this will work fine.
Regards,
Ray L.
--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> It isn't clear what type of cylinder you are using, but I have seen dual sided pistons used with a needle valve on the exaust side to control the speed of motion.
> Â
> TK
>
> From: himykabibble <jagboy@...>
> To: DynoMotion@yahoogroups.com
> Sent: Friday, October 19, 2012 11:51 AM
> Subject: [DynoMotion] Re: It's Alive! It's Alive! (Insert Maniacal Laugh Here...)
>
> Â
> Tom,
>
> Yes. Right now it's very rude and crude. A shock, or even a spring, on the end should get rid of the rough "landing" when it parks. I actually want some "bump" when approaching the spindle, to ensure it seats completely.
>
> Regards,
> Ray L.
>
> --- In mailto:DynoMotion%40yahoogroups.com, Tom Kerekes <tk@> wrote:
> >
> > Kool!ÃÂ Any chance to reduce the deceleration on the swing arm?ÃÂ Maybe a small shock absorber?ÃÂ Or use a servo :}
> > ÃÂ
> > TK
> >
> > From: himykabibble <jagboy@>
> > To: mailto:DynoMotion%40yahoogroups.com
> > Sent: Friday, October 19, 2012 10:15 AM
> > Subject: [DynoMotion] It's Alive! It's Alive! (Insert Maniacal Laugh Here...)
> >
> > ÃÂ
> > I just got my home-built carousel auto tool changer sequencing under KFlop control for the first time. Still lots to do, but it basically seems to work very nicely. I can't wait to get it finished up and in-service!
> >
> > It's VERY brute force right now, running completely open-loop, with just (loooooong) delays to make sure each step completes before the next is initiated. When done, it should be well under 10 seconds per toolchange, and have enough feedback to detect any possible fault, and abort if anything goes wrong.
> >
> > http://youtu.be/xPSgeAMuFC4
> >
> > Regards,
> > Ray L.
> >
> |
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