Re: [Emc-users] Increasing home speed

2015-06-27 Thread Gene Heskett 
On Saturday 27 June 2015 07:10:42 John Thornton wrote:
> Yep Gene it is a multipurpose magic button and I've threatened to add
> it to my hard buttons more than once just to make it easy to clear the
> table.

I am surprised you haven't already John.  If there is one thing I have 
learned during my getting to be lengthy time on this list, is that 
regardless of how exotic the problem may be to one, someone else has 
seen it and fixed it already.  I suspect as a group, you folks amaze me 
far more often than my purely electronics comments do for any or all of 
you.  The combined knowledge of this group is Mensa grade or better.

The bottom line is that if the machine knows where it is, you can run it 
to an arbitray position very close to home.  At its best rapids speed, 
doing it safely, so a new bootup home operation needs only the few 
seconds to confirm it even if its at creep speeds.  At the end of the 
week, that could add an hours worth of production time to the machine if 
its a 20 foot bed model.  In a busy shop, thats pure money.

Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] Increasing home speed

2015-06-27 Thread Eric H. Johnson 
John,

I backed off on the acceleration and now it can home much faster. I did not 
realize that parameter affected homing so much. I will have to put acceleration 
back to where it was to generate the error.

Thanks,
Eric


On June 26, 2015 5:04:41 PM EDT, John Thornton  wrote:
>The error would help a lot... on my plasma machine I have a "Rapid to 
>Home" button and after I'm done cutting and before shutting off I press
>
>the magic button. Homing only takes a few seconds when I fire it back
>up.
>
>JT
>
>On 6/25/2015 8:33 PM, Eric H. Johnson wrote:
>> Hi all,
>>
>>   
>>
>> I am not sure I understand why I cannot increase my home velocity for
>X and
>> Y. I have a 12' by 20' table and have not been able to increase  the
>home
>> velocity much above 0.25, which is tortuously slow (linuxcnc 2.6).
>> Unfortunately I did not write down the exact error message when I was
>at the
>> machine, but looking it up it seemed to indicate that the home sensor
>did
>> not stay stable long enough to complete the home.
>>
>>   
>>
>> My home sensors are micro-switches which are closed by a plate which
>first
>> contacts the home sensor, then the end of travel limit, and finally
>the hard
>> stop. Once contact is made, the switches never release until the axis
>> reverses direction.  The home sensors are debounced, and I increased
>the
>> debounce time from about 5ms to 10ms, so I am pretty sure there is
>not a
>> state change once the debounce time is satisfied on initial contact.
>>
>>   
>>
>> Is there something about the homing sequence I am still missing?
>>
>>   
>>
>> Thanks,
>>
>> Eric
>>
>>   
>>
>>
>LCQRN7fcnk8RJ6s6N8rBF7Rd3_yKW18Chwm1k1H6H0?si=6453247850577920&pi=90ee8c53-8
>> 5e5-4df5-b55c-48515242dba9>
>>
>--
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>> OpManager is web-based network management software that monitors
>> network devices and physical & virtual servers, alerts via email &
>sms
>> for fault. Monitor 25 devices for free with no restriction. Download
>now
>> http://ad.doubleclick.net/ddm/clk/292181274;119417398;o
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>
>
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>network devices and physical & virtual servers, alerts via email & sms 
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Re: [Emc-users] Increasing home speed

2015-06-27 Thread John Thornton 
Yep Gene it is a multipurpose magic button and I've threatened to add it 
to my hard buttons more than once just to make it easy to clear the table.

JT

On 6/26/2015 4:44 PM, Gene Heskett wrote:
> On Friday 26 June 2015 17:04:41 John Thornton wrote:
>> The error would help a lot... on my plasma machine I have a "Rapid to
>> Home" button and after I'm done cutting and before shutting off I
>> press the magic button. Homing only takes a few seconds when I fire it
>> back up.
>>
>> JT
> Chuckle.  I guess thats why we pay you the big bucks, John. ;-)
>
> Thats downright thinking it thru.  Not to mention it probably gets the
> torch out of the way of the changing to a fresh sheet so it doesn't take
> a beating when the sheet slides not quite under it.  Sweet!
>
>
>> On 6/25/2015 8:33 PM, Eric H. Johnson wrote:
>>> Hi all,
>>>
>>>
>>>
>>> I am not sure I understand why I cannot increase my home velocity
>>> for X and Y. I have a 12' by 20' table and have not been able to
>>> increase  the home velocity much above 0.25, which is tortuously
>>> slow (linuxcnc 2.6). Unfortunately I did not write down the exact
>>> error message when I was at the machine, but looking it up it seemed
>>> to indicate that the home sensor did not stay stable long enough to
>>> complete the home.
>>>
>>>
>>>
>>> My home sensors are micro-switches which are closed by a plate which
>>> first contacts the home sensor, then the end of travel limit, and
>>> finally the hard stop. Once contact is made, the switches never
>>> release until the axis reverses direction.  The home sensors are
>>> debounced, and I increased the debounce time from about 5ms to 10ms,
>>> so I am pretty sure there is not a state change once the debounce
>>> time is satisfied on initial contact.
>>>
>>>
>>>
>>> Is there something about the homing sequence I am still missing?
>>>
>>>
>>>
>>> Thanks,
>>>
>>> Eric
>>>
>>>
>>> >> N7sKj6v4
>>> LCQRN7fcnk8RJ6s6N8rBF7Rd3_yKW18Chwm1k1H6H0?si=6453247850577920&pi=90
>>> ee8c53-8 5e5-4df5-b55c-48515242dba9>
>>> 
>>> -- Monitor 25 network devices or servers for free with
>>> OpManager! OpManager is web-based network management software that
>>> monitors network devices and physical & virtual servers, alerts via
>>> email & sms for fault. Monitor 25 devices for free with no
>>> restriction. Download now
>>> http://ad.doubleclick.net/ddm/clk/292181274;119417398;o
>>> ___
>>> Emc-users mailing list
>>> Emc-users@lists.sourceforge.net
>>> https://lists.sourceforge.net/lists/listinfo/emc-users
>> --
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>> OpManager is web-based network management software that monitors
>> network devices and physical & virtual servers, alerts via email & sms
>> for fault. Monitor 25 devices for free with no restriction. Download
>> now http://ad.doubleclick.net/ddm/clk/292181274;119417398;o
>> ___
>> Emc-users mailing list
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>> https://lists.sourceforge.net/lists/listinfo/emc-users
> Cheers, Gene Heskett


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Re: [Emc-users] Increasing home speed

2015-06-26 Thread Gene Heskett 
On Friday 26 June 2015 17:04:41 John Thornton wrote:
> The error would help a lot... on my plasma machine I have a "Rapid to
> Home" button and after I'm done cutting and before shutting off I
> press the magic button. Homing only takes a few seconds when I fire it
> back up.
>
> JT

Chuckle.  I guess thats why we pay you the big bucks, John. ;-)

Thats downright thinking it thru.  Not to mention it probably gets the 
torch out of the way of the changing to a fresh sheet so it doesn't take 
a beating when the sheet slides not quite under it.  Sweet!


> On 6/25/2015 8:33 PM, Eric H. Johnson wrote:
> > Hi all,
> >
> >
> >
> > I am not sure I understand why I cannot increase my home velocity
> > for X and Y. I have a 12' by 20' table and have not been able to
> > increase  the home velocity much above 0.25, which is tortuously
> > slow (linuxcnc 2.6). Unfortunately I did not write down the exact
> > error message when I was at the machine, but looking it up it seemed
> > to indicate that the home sensor did not stay stable long enough to
> > complete the home.
> >
> >
> >
> > My home sensors are micro-switches which are closed by a plate which
> > first contacts the home sensor, then the end of travel limit, and
> > finally the hard stop. Once contact is made, the switches never
> > release until the axis reverses direction.  The home sensors are
> > debounced, and I increased the debounce time from about 5ms to 10ms,
> > so I am pretty sure there is not a state change once the debounce
> > time is satisfied on initial contact.
> >
> >
> >
> > Is there something about the homing sequence I am still missing?
> >
> >
> >
> > Thanks,
> >
> > Eric
> >
> >
> >  >N7sKj6v4
> > LCQRN7fcnk8RJ6s6N8rBF7Rd3_yKW18Chwm1k1H6H0?si=6453247850577920&pi=90
> >ee8c53-8 5e5-4df5-b55c-48515242dba9>
> > 
> >-- Monitor 25 network devices or servers for free with
> > OpManager! OpManager is web-based network management software that
> > monitors network devices and physical & virtual servers, alerts via
> > email & sms for fault. Monitor 25 devices for free with no
> > restriction. Download now
> > http://ad.doubleclick.net/ddm/clk/292181274;119417398;o
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
> --
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> network devices and physical & virtual servers, alerts via email & sms
> for fault. Monitor 25 devices for free with no restriction. Download
> now http://ad.doubleclick.net/ddm/clk/292181274;119417398;o
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Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

--
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Re: [Emc-users] Increasing home speed

2015-06-26 Thread John Thornton 
The error would help a lot... on my plasma machine I have a "Rapid to 
Home" button and after I'm done cutting and before shutting off I press 
the magic button. Homing only takes a few seconds when I fire it back up.

JT

On 6/25/2015 8:33 PM, Eric H. Johnson wrote:
> Hi all,
>
>   
>
> I am not sure I understand why I cannot increase my home velocity for X and
> Y. I have a 12' by 20' table and have not been able to increase  the home
> velocity much above 0.25, which is tortuously slow (linuxcnc 2.6).
> Unfortunately I did not write down the exact error message when I was at the
> machine, but looking it up it seemed to indicate that the home sensor did
> not stay stable long enough to complete the home.
>
>   
>
> My home sensors are micro-switches which are closed by a plate which first
> contacts the home sensor, then the end of travel limit, and finally the hard
> stop. Once contact is made, the switches never release until the axis
> reverses direction.  The home sensors are debounced, and I increased the
> debounce time from about 5ms to 10ms, so I am pretty sure there is not a
> state change once the debounce time is satisfied on initial contact.
>
>   
>
> Is there something about the homing sequence I am still missing?
>
>   
>
> Thanks,
>
> Eric
>
>   
>  LCQRN7fcnk8RJ6s6N8rBF7Rd3_yKW18Chwm1k1H6H0?si=6453247850577920&pi=90ee8c53-8
> 5e5-4df5-b55c-48515242dba9>
> --
> Monitor 25 network devices or servers for free with OpManager!
> OpManager is web-based network management software that monitors
> network devices and physical & virtual servers, alerts via email & sms
> for fault. Monitor 25 devices for free with no restriction. Download now
> http://ad.doubleclick.net/ddm/clk/292181274;119417398;o
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users


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Re: [Emc-users] Increasing home speed

2015-06-26 Thread Eric H. Johnson 
Craig,

The home switch and the end of travel are about the width of the
micro-switch apart, i.e. 1-1.5". The axis stops well before the end of
travel, probably in a 1/4". Are you suggesting the accel and velocity are
too high or too low?

Regards,
Eric


>
Acceleration  limits,  after sensing switch how far would it go before
turning around?,  It depends on velocity and acceleration limits.



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Re: [Emc-users] Increasing home speed

2015-06-25 Thread craig 
On 6/25/2015 6:33 PM, Eric H. Johnson wrote:
> Hi all,
>
>   
> I am not sure I understand why I cannot increase my home velocity for X and
> Y. I have a 12' by 20' table and have not been able to increase  the home
> velocity much above 0.25, which is tortuously slow (linuxcnc 2.6).
> Unfortunately I did not write down the exact error message when I was at the
> machine, but looking it up it seemed to indicate that the home sensor did
> not stay stable long enough to complete the home.
>
>   
> My home sensors are micro-switches which are closed by a plate which first
> contacts the home sensor, then the end of travel limit, and finally the hard
> stop. Once contact is made, the switches never release until the axis
> reverses direction.  The home sensors are debounced, and I increased the
> debounce time from about 5ms to 10ms, so I am pretty sure there is not a
> state change once the debounce time is satisfied on initial contact.
>
>   
> Is there something about the homing sequence I am still missing?
>
Acceleration  limits,  after sensing switch how far would it go before 
turning around?,  It depends on velocity and acceleration limits.

Craig
>   
>
> Thanks,
>
> Eric
>
>   
>  LCQRN7fcnk8RJ6s6N8rBF7Rd3_yKW18Chwm1k1H6H0?si=6453247850577920&pi=90ee8c53-8
> 5e5-4df5-b55c-48515242dba9>
> --
> Monitor 25 network devices or servers for free with OpManager!
> OpManager is web-based network management software that monitors
> network devices and physical & virtual servers, alerts via email & sms
> for fault. Monitor 25 devices for free with no restriction. Download now
> http://ad.doubleclick.net/ddm/clk/292181274;119417398;o
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users


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[Emc-users] Increasing home speed

2015-06-25 Thread Eric H. Johnson 
Hi all,

 

I am not sure I understand why I cannot increase my home velocity for X and
Y. I have a 12' by 20' table and have not been able to increase  the home
velocity much above 0.25, which is tortuously slow (linuxcnc 2.6).
Unfortunately I did not write down the exact error message when I was at the
machine, but looking it up it seemed to indicate that the home sensor did
not stay stable long enough to complete the home.

 

My home sensors are micro-switches which are closed by a plate which first
contacts the home sensor, then the end of travel limit, and finally the hard
stop. Once contact is made, the switches never release until the axis
reverses direction.  The home sensors are debounced, and I increased the
debounce time from about 5ms to 10ms, so I am pretty sure there is not a
state change once the debounce time is satisfied on initial contact.

 

Is there something about the homing sequence I am still missing?

 

Thanks,

Eric

 
 
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