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Jon Elson | 1 Jun 2009 01:42

Re: Inspiration please......

sam sokolik wrote:
> The cnczone link tom posted is what I have been working on.   The 
> current schem/pictures are here
> http://www.electronicsam.com/images/KandT/servostart/schem/latestcurrentlimit/
> use at your own risk :)
>
> It might be overkill for your application but might give you some 
> ideas.  The input is PWM/PWM (sending pwm in one input is cw - sending 
> pwm in the other input is ccw) (plus an enable).  I have run this 
> directly from the printer port but am using the pluto for faster encoder 
> counting when using it to run closed loop (servo).  It has been lightly 
> tested up to 22a 180v.  (the limit right now is the boot strap diodes 
> are only rated for 200v).  For my app that should be fine as 150-160v is 
> where my servos max out.
>   
It would be quite easy to set up appropriate gates to deliver this dual 
PWM signal from my
Universal PWM Controller.  You can set it for whatever PWM frequency you 
like (I use 50 KHz
with my own servo amps).  My PWM controller puts out PWM and direction 
(kind of a sign-magnitude
thing), but a single gate package like the 74HC00 could be wired up to 
convert from that to what your drive
wants.  I mention this in case others might want to try out your amp and 
have trouble with the Pluto.

Jon

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Ed | 1 Jun 2009 01:01
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Re: Inspiration please......

Jon Elson wrote:
> sam sokolik wrote:
> 
>>The cnczone link tom posted is what I have been working on.   The 
>>current schem/pictures are here
>>http://www.electronicsam.com/images/KandT/servostart/schem/latestcurrentlimit/
>>use at your own risk :)
>>
>>It might be overkill for your application but might give you some 
>>ideas.  The input is PWM/PWM (sending pwm in one input is cw - sending 
>>pwm in the other input is ccw) (plus an enable).  I have run this 
>>directly from the printer port but am using the pluto for faster encoder 
>>counting when using it to run closed loop (servo).  It has been lightly 
>>tested up to 22a 180v.  (the limit right now is the boot strap diodes 
>>are only rated for 200v).  For my app that should be fine as 150-160v is 
>>where my servos max out.
>>  
> 
> It would be quite easy to set up appropriate gates to deliver this dual 
> PWM signal from my
> Universal PWM Controller.  You can set it for whatever PWM frequency you 
> like (I use 50 KHz
> with my own servo amps).  My PWM controller puts out PWM and direction 
> (kind of a sign-magnitude
> thing), but a single gate package like the 74HC00 could be wired up to 
> convert from that to what your drive
> wants.  I mention this in case others might want to try out your amp and 
> have trouble with the Pluto.
> 
> Jon
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Jim Coleman | 1 Jun 2009 05:17
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Re: VMC retrofit candidate in ohio

yeah its like that one, but has plexiglass guards around the front and
a bed to catch chips.  The machine is in Mansfield, Ohio 44902.  Few
minutes south of I-30, maybe 20 minutes north of I-71.

Sorry it took me a few days, just started packing the house up for a
move.  Also, I dont think that I mentioned that I've only seen this
machine cutting aluminum, if that might mean less wear on the
ballscrews than if it were chewing steel all day.  I think the boss
will be trying to get the tooling out of it sometime this week, If
anyone is interested I can let him know so he doesnt get destructive
with it.

Jim

On Fri, May 29, 2009 at 11:22 AM, Kirk Wallace
<kwallace@...> wrote:
> On Fri, 2009-05-29 at 06:35 -0400, Jim Coleman wrote:
>> Hey everyone, Just wanting to let you guys know that my employer is
>> going to be scrapping a hitachi seiki VA-45 VMC.  It has a Fanuc 11m
> ... snip
>> If anyone is interested let me know and I will pass along phone
>> numbers.  Also, A buyer would be responsible for pickup and transport,
>> and it's a machine we have to use a ladder to get to the Z motor... so
>> professional level services will probably be required.
>>
>> Jim
>
> It's like this one?
> http://www.machineco.com/1899_Mach_Center_Hitachi-Seiki_VA-45.htm
>
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An Pham Duc | 1 Jun 2009 05:38
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how to install driver pci to lpt card in ubuntu 6.06

I have just bought a pci to lpt card. I intended to insert more I/O ports
for emc2. But I could not install the card in Ubuntu 6.06. I did as the
following instructions

*(1)install
<1>-copy install_p_80x86.o to /usr/sbin
<2>-Add /usr/sbin/install_p_80x86 at the end of the /etc/rc.d/rc.local.
<3>-reboot*
 but I could not find the path * /etc/rc.d/rc.local.  *in Ubuntu 6.06, so I
used path * /etc/rc.local. *Unfortunately, my computer did not recognize the
hardware.

Could somebody help me solve this problme. thank u

--

-- 
ThS. Pham Duc An
Bo mon GCVL & DCCN - Khoa Co Khi - Truong DHBK Ha Noi -
Phong 226 - C1 - DHBK Ha Noi - So 1 Dai Co Viet
Tel: 04. 38692007
Mobile 0985813097
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Jon Elson | 1 Jun 2009 06:12

Re: Inspiration please......

Ed wrote:
>
>
>
> And this dovetails with my thought of reusing the DC spindle motor on my 
>   CHNC Hardinge. Sam and Jon could this be done and not have to worry 
> about a sag in the spindle speed at load? Reuse means not having to buy 
> a VFD or change the motor mounts.
>   
I have no idea what the specs on that motor are.  Some machines like the 
Monarch EE had wound-field motors,
and used field weakening to get a wide range of speeds.  So, a system 
like that would need TWO drives, a small
one for the field and a heavy one for the armature.  You can use a 
feedback scheme so that a HAL component
would set up the approximate armature and field PWM duty cycles, and 
then continually adjust from there to
maintain constant speed.  Especially if you would already have a spindle 
encoder, that can be used to feed spindle
speed back to HAL.

Jon

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Ian Wright | 1 Jun 2009 08:43

Re: Inspiration please......

Thanks for these links guys - I'll follow them up..

Best wishes,
Ian
---------------------------
Ian W Wright
Sheffield  UK

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Leslie Newell | 1 Jun 2009 11:55
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'tool change' buttons

I use my lathe quite a lot as a semi-manual machine using two large 
MPGs. The lathe has a quick change tool post. I would like to have a row 
of 8 buttons with LEDs for my most commonly used tools. Each button 
selects the tool and applies it's offsets. Put the tool in the post, 
press the button and away you go. The LEDs show the currently selected 
tool.

Is this possible? I assume I would have to write a custom hal module but 
that shouldn't be an issue.

Les

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Chris Radek | 1 Jun 2009 13:44
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Re: 'tool change' buttons

On Mon, Jun 01, 2009 at 10:55:34AM +0100, Leslie Newell wrote:
> I use my lathe quite a lot as a semi-manual machine using two large 
> MPGs. The lathe has a quick change tool post. I would like to have a row 
> of 8 buttons with LEDs for my most commonly used tools. Each button 
> selects the tool and applies it's offsets. Put the tool in the post, 
> press the button and away you go. The LEDs show the currently selected 
> tool.
> 
> Is this possible? I assume I would have to write a custom hal module but 
> that shouldn't be an issue.

halui can issue MDI commands.  It sounds like you want MDI commands
like "T1 M6 G43" and buttons to issue them.

Chris

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Leslie Newell | 1 Jun 2009 14:06
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Re: 'tool change' buttons

Thanks Chris,

That looks ideal. It also exports the tool number so I can use a demux 
to route the number to the leds.

Just a thought - will it work in both manual and MDI mode? The docs say 
it will work in manual mode so I assume it also works in MDI mode.

Les

Chris Radek wrote:
>
> halui can issue MDI commands.  It sounds like you want MDI commands
> like "T1 M6 G43" and buttons to issue them.
>
> Chris
>
>   

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Chris Radek | 1 Jun 2009 15:31
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Re: 'tool change' buttons

On Mon, Jun 01, 2009 at 01:06:39PM +0100, Leslie Newell wrote:
> Thanks Chris,
> 
> That looks ideal. It also exports the tool number so I can use a demux 
> to route the number to the leds.
> 
> Just a thought - will it work in both manual and MDI mode? The docs say 
> it will work in manual mode so I assume it also works in MDI mode.
> 
> Les

halui is fairly smart about modes.  If you ask it to send an mdi
command when the system is in manual mode, it will switch to mdi mode
and send the command, wait for it to complete, and then switch back to
manual.  Like you say, if the system is already in mdi mode, halui can
just send the command and be done with it.

Chris

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Gmane