Re: [Emc-users] Rotary convention

[Gene Heskett]

On Monday 18 March 2019 22:37:13 Stuart Stevenson wrote:

> Gene,
>
> Rotary convention is whatever you want on your machine.
> To match what a CAD system shows you would rotate the geometry
> positive by moving in the counter clockwise direction when you view
> from the X, Y, or Z directions. When you look at the Cartesian
> coordinate plane laying on your desk, you assume the X axis is
> pointing to your right, the Y axis is pointing away from you and the Z
> axis is pointing up. Generally, a positive rotation moves the geometry
> in a ccw direction.
>   The normal convention also assigns the label of the rotary tables as
> follows - A axis rotates around the X axis - B axis rotates around the
> Y axis and the C axis rotates around the Z axis.
>   If you mount the rotary table on the left (X negative) end of the XY
> table (as an A axis) then a positive rotation of the rotary table
> would result in the top of the table moving toward you.
>   An A axis that carries the tool would rotate the top away from you.
> This would be the result the top of the geometry moving toward you but
> since the rotary table is carrying the tool the top of the tool should
> move away from you.
>   All of this is 100% arbitrary. The only requirement is the program
> numbers and signs match the motion of the machine. Make it comfortable
> for you and then do it with no apologies to anyone.
>   Almost every machine control can set the rotation however the shop
> wants. All the labels are just that labels. You can label any axis
> whatever you want. The axis Peaches can rotate around the Rutabaga
> axis for all the machine cares.
>
> Regards
> Stuart
>
Chuckle, nice way of putting it, and I don't have to reverse anything. 
One thing seems for sure, and thats the speed of this belt drive thing, 
the g0 speed is above 21000 degrees a minute.  That also means its a bit 
soft, with cutting forces moving it a bit. But now I need a cbn wheel to 
shape lathe tools with a gentle touch.

Thanks Stuart. 
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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] Spindle motor coolant advice needed

[Gene Heskett]

On Monday 18 March 2019 21:47:21 Thaddeus Waldner wrote:

> Try a pressure pot. Of course you’ll need a valve for the liquid line
> as well as the air line ... 2-1/2 Gallon Pressure Tank Paint10 ft Air
> and Fluid Hose with 3.0 mm Nozzle 6940015399833 | eBay
> d-Fluid-Hose-with-3-0-mm-Nozzle/222805940003?_trkparms=aid%3D222007%26a
>lgo%3DSIM.MBE%26ao%3D1%26asc%3D20131231084308%26meid%3D6852bb2821004a75
>b4b33f0629d4a214%26pid%3D100010%26rk%3D2%26rkt%3D2%26sd%3D392148898537%
>26itm%3D222805940003&_trksid=p2047675.c100010.m2109>

No room for such. My garage is worse that Cecil T's shop for crowded.

> > On Mar 18, 2019, at 12:50 PM, Gene Heskett 
> > wrote:
> >
> > On Monday 18 March 2019 09:10:04 Todd Zuercher wrote:
> >> Don't discount pump heating of the water.  Last week I was working
> >> on one of our machines that was down with several issues (much
> >> larger spindle 19hp).  One of the problems was the cooling fan for
> >> the water was dead.  It was a lower priority than some of the other
> >> problems, so I was working on it for a couple of hours with the
> >> power on, then went look at the cooler and I was shocked at how
> >> warm the water was. Without the spindle running at all, in the time
> >> I worked on the machine, the water temp had risen from room temp to
> >> about 3 times higher than it normally is with the spindle cutting
> >> and the cooling fan working.  The fan and radiators are very
> >> important on this 5 gallon cooling system.
> >>
> >> Todd Zuercher
> >> P. Graham Dunn Inc.
> >> 630 Henry Street
> >> Dalton, Ohio 44618
> >> Phone:  (330)828-2105ext. 2031
> >
> > Yes, I was somewhat surprised myself when after 3 days, the 3
> > gallons in my tank was up to 38C.  Now my pump starts 1/2 second
> > after the spindle, and stops 120 seconds after its shut down.  And
> > just this morning got all the pyvcp tallies working. At least
> > showing pump power s/b on, no flow switch. :(
> >
> > Yesterday, on a Sunday even, saw the usps driver put a box on the
> > chair just outside the front door, with a gallon of Kool-mist in it,
> > so I discovered just how little suction the mister I bought had.
> > Takes more air at a higher pressure than my 2hp AC is comfortable
> > with to lift the coolant out of a dishwasher pod bucket sitting on
> > the table about 4" below the bed surface.  So I suspect I'll have to
> > make a shelf on the side of the gantry to set the src container on,
> > raising it about 4". The suction hose is also a bit short, so
> > moveing the coolant tank with the gantry will help there too.  So
> > will approaching the mister valve from below, sucking hard enough to
> > pull it over the top of the gantry crossbar takes way too much air.
> >
> > Then last night I plugged in the A table, but it stopped working as
> > I believe I'll have to fix the windings order.  Not the first time
> > as no two motor cables are wired the same so I've had to adjust
> > other motors already.  And I think I've a hal routine to calibrate
> > the rotation scale working by y measureing apos-fb for 100 clicks of
> > the home switch. I like to be able to set angles to arc-minutes
> > accuracy at least. :)
> >
> > Anybody interested in that hal code?
> >
> >> -Original Message-
> >> From: Ken Strauss 
> >> Sent: Friday, March 15, 2019 3:03 PM
> >> To: 'Enhanced Machine Controller (EMC)'
> >>  Subject: Re: [Emc-users] Spindle
> >> motor coolant advice needed
> >>
> >>> -Original Message-
> >>> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> >>> Sent: Friday, March 15, 2019 1:44 PM
> >>> To: Enhanced Machine Controller (EMC)
> >>> Subject: Re: [Emc-users] Spindle motor coolant advice needed
> >>>
> >>> When I had a coolant tank, for a different purpose, I put
> >>> automatic "anti freeze in the water.   It is make just for this
> >>> purpose and is non-corrosive with materials used in car engines.
> >>>
> >>> Also, if the water recirculates it will eventually warm up.  I put
> >>> a 12 volt fan on the tank lid and made it into an evaporative
> >>> cooler. Then you top off the tank with new water now and then.  If
> >>> the water is taking even 25 watts of heat from the system it will
> >>> heat up quite a lot unless you rig some kind of cooling.
> >>
> >> How about using a radiator like
> >> https://www.amazon.com/Computer-Radiator-Water-Cooling-Cooler/dp/B0
> >>79D HJ91F/ which is intended to cool CPUs? It comes with mountings
> >> for three 120mm muffin fans.
> >>
> >>
> >>
> >>
> >> ___
> >> Emc-users mailing list
> >> Emc-users@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/emc-users
> >>
> >>
> >> ___
> >> Emc-users mailing list
> >> Emc-users@lists.sourceforge.net
> >> https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> > Cheers, Gene Heskett
> > --
> > "There are four boxes 

[Emc-users] Rotary convention

[Stuart Stevenson]

Gene,

Rotary convention is whatever you want on your machine.
To match what a CAD system shows you would rotate the geometry positive by
moving in the counter clockwise direction when you view from the X, Y, or Z
directions. When you look at the Cartesian coordinate plane laying on your
desk, you assume the X axis is pointing to your right, the Y axis is
pointing away from you and the Z axis is pointing up. Generally, a positive
rotation moves the geometry in a ccw direction.
  The normal convention also assigns the label of the rotary tables as
follows - A axis rotates around the X axis - B axis rotates around the Y
axis and the C axis rotates around the Z axis.
  If you mount the rotary table on the left (X negative) end of the XY
table (as an A axis) then a positive rotation of the rotary table would
result in the top of the table moving toward you.
  An A axis that carries the tool would rotate the top away from you. This
would be the result the top of the geometry moving toward you but since the
rotary table is carrying the tool the top of the tool should move away from
you.
  All of this is 100% arbitrary. The only requirement is the program
numbers and signs match the motion of the machine. Make it comfortable for
you and then do it with no apologies to anyone.
  Almost every machine control can set the rotation however the shop wants.
  All the labels are just that labels. You can label any axis whatever you
want. The axis Peaches can rotate around the Rutabaga axis for all the
machine cares.

Regards
Stuart

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Re: [Emc-users] Spindle motor coolant advice needed

[Thaddeus Waldner]

Try a pressure pot. Of course you’ll need a valve for the liquid line as well 
as the air line ...
2-1/2 Gallon Pressure Tank Paint10 ft Air and Fluid Hose with 3.0 mm Nozzle 
6940015399833 | eBay 


> On Mar 18, 2019, at 12:50 PM, Gene Heskett  wrote:
> 
> On Monday 18 March 2019 09:10:04 Todd Zuercher wrote:
> 
>> Don't discount pump heating of the water.  Last week I was working on
>> one of our machines that was down with several issues (much larger
>> spindle 19hp).  One of the problems was the cooling fan for the water
>> was dead.  It was a lower priority than some of the other problems, so
>> I was working on it for a couple of hours with the power on, then went
>> look at the cooler and I was shocked at how warm the water was. 
>> Without the spindle running at all, in the time I worked on the
>> machine, the water temp had risen from room temp to about 3 times
>> higher than it normally is with the spindle cutting and the cooling
>> fan working.  The fan and radiators are very important on this 5
>> gallon cooling system.
>> 
>> Todd Zuercher
>> P. Graham Dunn Inc.
>> 630 Henry Street 
>> Dalton, Ohio 44618
>> Phone:  (330)828-2105ext. 2031
> 
> Yes, I was somewhat surprised myself when after 3 days, the 3 gallons in 
> my tank was up to 38C.  Now my pump starts 1/2 second after the spindle, 
> and stops 120 seconds after its shut down.  And just this morning got 
> all the pyvcp tallies working. At least showing pump power s/b on, no 
> flow switch. :(
> 
> Yesterday, on a Sunday even, saw the usps driver put a box on the chair 
> just outside the front door, with a gallon of Kool-mist in it, so I 
> discovered just how little suction the mister I bought had. Takes more 
> air at a higher pressure than my 2hp AC is comfortable with to lift the 
> coolant out of a dishwasher pod bucket sitting on the table about 4" 
> below the bed surface.  So I suspect I'll have to make a shelf on the 
> side of the gantry to set the src container on, raising it about 4". The 
> suction hose is also a bit short, so moveing the coolant tank with the 
> gantry will help there too.  So will approaching the mister valve from 
> below, sucking hard enough to pull it over the top of the gantry 
> crossbar takes way too much air.
> 
> Then last night I plugged in the A table, but it stopped working as I 
> believe I'll have to fix the windings order.  Not the first time as no 
> two motor cables are wired the same so I've had to adjust other motors 
> already.  And I think I've a hal routine to calibrate the rotation scale 
> working by y measureing apos-fb for 100 clicks of the home switch. I 
> like to be able to set angles to arc-minutes accuracy at least. :)
> 
> Anybody interested in that hal code?
>> 
>> -Original Message-
>> From: Ken Strauss 
>> Sent: Friday, March 15, 2019 3:03 PM
>> To: 'Enhanced Machine Controller (EMC)'
>>  Subject: Re: [Emc-users] Spindle
>> motor coolant advice needed
>> 
>>> -Original Message-
>>> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
>>> Sent: Friday, March 15, 2019 1:44 PM
>>> To: Enhanced Machine Controller (EMC)
>>> Subject: Re: [Emc-users] Spindle motor coolant advice needed
>>> 
>>> When I had a coolant tank, for a different purpose, I put automatic
>>> "anti freeze in the water.   It is make just for this purpose and is
>>> non-corrosive with materials used in car engines.
>>> 
>>> Also, if the water recirculates it will eventually warm up.  I put a
>>> 12 volt fan on the tank lid and made it into an evaporative cooler. 
>>>  Then you top off the tank with new water now and then.  If the
>>> water is taking even 25 watts of heat from the system it will heat
>>> up quite a lot unless you rig some kind of cooling.
>> 
>> How about using a radiator like
>> https://www.amazon.com/Computer-Radiator-Water-Cooling-Cooler/dp/B079D
>> HJ91F/ which is intended to cool CPUs? It comes with mountings for
>> three 120mm muffin fans.
>> 
>> 
>> 
>> 
>> ___
>> Emc-users mailing list
>> Emc-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/emc-users
>> 
>> 
>> ___
>> Emc-users mailing list
>> Emc-users@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/emc-users
> 
> 
> 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  >
> 
> 
> 
> ___
> Emc-users 

Re: [Emc-users] Spindle motor coolant advice needed (was, now rambling)

[Gene Heskett]

On Monday 18 March 2019 14:02:12 Gene Heskett wrote:

> > Then last night I plugged in the A table, but it stopped working as
> > I believe I'll have to fix the windings order.

That turned out to be a loose connection in the 5 volts to the driver.

And my code worked, giving me a scale of 20.something/degree. So for the 
first time in the 6 or 8 years I've had a rotary, its actually 
calibrated.

> > Not the first time 
> > as no two motor cables are wired the same so I've had to adjust
> > other motors already.  And I think I've a hal routine to calibrate
> > the rotation scale working by y measureing apos-fb for 100 clicks of
> > the home switch. I like to be able to set angles to arc-minutes
> > accuracy at least. :)
>
> Speaking to rotary's, is there a convention as to which way it turns?
> Are we looking face on, or down the axis from the rear for clockwise?

Ping?

And I'm disappointed in this mister.  Its best suction still needs around 
50 psi to prime the suction line with the src tank sitting on the bed, 
AND its blowing way more air out the side of the flex joints than is

Surely they aren't all this bad?  I was under the impression 15 psi was a 
great plenty, but not for this one/

Thanks guys.


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] Spindle motor coolant advice needed

[Gene Heskett]

On Monday 18 March 2019 13:50:34 Gene Heskett wrote:

> On Monday 18 March 2019 09:10:04 Todd Zuercher wrote:
> > Don't discount pump heating of the water.  Last week I was working
> > on one of our machines that was down with several issues (much
> > larger spindle 19hp).  One of the problems was the cooling fan for
> > the water was dead.  It was a lower priority than some of the other
> > problems, so I was working on it for a couple of hours with the
> > power on, then went look at the cooler and I was shocked at how warm
> > the water was. Without the spindle running at all, in the time I
> > worked on the machine, the water temp had risen from room temp to
> > about 3 times higher than it normally is with the spindle cutting
> > and the cooling fan working.  The fan and radiators are very
> > important on this 5 gallon cooling system.
> >
> > Todd Zuercher
> > P. Graham Dunn Inc.
> > 630 Henry Street 
> > Dalton, Ohio 44618
> > Phone:  (330)828-2105ext. 2031
>
> Yes, I was somewhat surprised myself when after 3 days, the 3 gallons
> in my tank was up to 38C.  Now my pump starts 1/2 second after the
> spindle, and stops 120 seconds after its shut down.  And just this
> morning got all the pyvcp tallies working. At least showing pump power
> s/b on, no flow switch. :(
>
> Yesterday, on a Sunday even, saw the usps driver put a box on the
> chair just outside the front door, with a gallon of Kool-mist in it,
> so I discovered just how little suction the mister I bought had. Takes
> more air at a higher pressure than my 2hp AC is comfortable with to
> lift the coolant out of a dishwasher pod bucket sitting on the table
> about 4" below the bed surface.  So I suspect I'll have to make a
> shelf on the side of the gantry to set the src container on, raising
> it about 4". The suction hose is also a bit short, so moveing the
> coolant tank with the gantry will help there too.  So will approaching
> the mister valve from below, sucking hard enough to pull it over the
> top of the gantry crossbar takes way too much air.
>
> Then last night I plugged in the A table, but it stopped working as I
> believe I'll have to fix the windings order.  Not the first time as no
> two motor cables are wired the same so I've had to adjust other motors
> already.  And I think I've a hal routine to calibrate the rotation
> scale working by y measureing apos-fb for 100 clicks of the home
> switch. I like to be able to set angles to arc-minutes accuracy at
> least. :)
>
Speaking to rotary's, is there a convention as to which way it turns? Are 
we looking face on, or down the axis from the rear for clockwise?

Thanks.

> Anybody interested in that hal code?
>
> > -Original Message-
> > From: Ken Strauss 
> > Sent: Friday, March 15, 2019 3:03 PM
> > To: 'Enhanced Machine Controller (EMC)'
> >  Subject: Re: [Emc-users] Spindle
> > motor coolant advice needed
> >
> > > -Original Message-
> > > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > > Sent: Friday, March 15, 2019 1:44 PM
> > > To: Enhanced Machine Controller (EMC)
> > > Subject: Re: [Emc-users] Spindle motor coolant advice needed
> > >
> > > When I had a coolant tank, for a different purpose, I put
> > > automatic "anti freeze in the water.   It is make just for this
> > > purpose and is non-corrosive with materials used in car engines.
> > >
> > > Also, if the water recirculates it will eventually warm up.  I put
> > > a 12 volt fan on the tank lid and made it into an evaporative
> > > cooler. Then you top off the tank with new water now and then.  If
> > > the water is taking even 25 watts of heat from the system it will
> > > heat up quite a lot unless you rig some kind of cooling.
> >
> > How about using a radiator like
> > https://www.amazon.com/Computer-Radiator-Water-Cooling-Cooler/dp/B07
> >9D HJ91F/ which is intended to cool CPUs? It comes with mountings for
> > three 120mm muffin fans.
> >
> >
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
> >
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
> Cheers, Gene Heskett


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] Spindle motor coolant advice needed

[Gene Heskett]

On Monday 18 March 2019 09:10:04 Todd Zuercher wrote:

> Don't discount pump heating of the water.  Last week I was working on
> one of our machines that was down with several issues (much larger
> spindle 19hp).  One of the problems was the cooling fan for the water
> was dead.  It was a lower priority than some of the other problems, so
> I was working on it for a couple of hours with the power on, then went
> look at the cooler and I was shocked at how warm the water was. 
> Without the spindle running at all, in the time I worked on the
> machine, the water temp had risen from room temp to about 3 times
> higher than it normally is with the spindle cutting and the cooling
> fan working.  The fan and radiators are very important on this 5
> gallon cooling system.
>
> Todd Zuercher
> P. Graham Dunn Inc.
> 630 Henry Street 
> Dalton, Ohio 44618
> Phone:  (330)828-2105ext. 2031

Yes, I was somewhat surprised myself when after 3 days, the 3 gallons in 
my tank was up to 38C.  Now my pump starts 1/2 second after the spindle, 
and stops 120 seconds after its shut down.  And just this morning got 
all the pyvcp tallies working. At least showing pump power s/b on, no 
flow switch. :(

Yesterday, on a Sunday even, saw the usps driver put a box on the chair 
just outside the front door, with a gallon of Kool-mist in it, so I 
discovered just how little suction the mister I bought had. Takes more 
air at a higher pressure than my 2hp AC is comfortable with to lift the 
coolant out of a dishwasher pod bucket sitting on the table about 4" 
below the bed surface.  So I suspect I'll have to make a shelf on the 
side of the gantry to set the src container on, raising it about 4". The 
suction hose is also a bit short, so moveing the coolant tank with the 
gantry will help there too.  So will approaching the mister valve from 
below, sucking hard enough to pull it over the top of the gantry 
crossbar takes way too much air.

Then last night I plugged in the A table, but it stopped working as I 
believe I'll have to fix the windings order.  Not the first time as no 
two motor cables are wired the same so I've had to adjust other motors 
already.  And I think I've a hal routine to calibrate the rotation scale 
working by y measureing apos-fb for 100 clicks of the home switch. I 
like to be able to set angles to arc-minutes accuracy at least. :)

Anybody interested in that hal code?
>
> -Original Message-
> From: Ken Strauss 
> Sent: Friday, March 15, 2019 3:03 PM
> To: 'Enhanced Machine Controller (EMC)'
>  Subject: Re: [Emc-users] Spindle
> motor coolant advice needed
>
> > -Original Message-
> > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > Sent: Friday, March 15, 2019 1:44 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Spindle motor coolant advice needed
> >
> > When I had a coolant tank, for a different purpose, I put automatic
> > "anti freeze in the water.   It is make just for this purpose and is
> > non-corrosive with materials used in car engines.
> >
> > Also, if the water recirculates it will eventually warm up.  I put a
> > 12 volt fan on the tank lid and made it into an evaporative cooler. 
> >   Then you top off the tank with new water now and then.  If the
> > water is taking even 25 watts of heat from the system it will heat
> > up quite a lot unless you rig some kind of cooling.
>
> How about using a radiator like
> https://www.amazon.com/Computer-Radiator-Water-Cooling-Cooler/dp/B079D
>HJ91F/ which is intended to cool CPUs? It comes with mountings for
> three 120mm muffin fans.
>
>
>
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>
>
> ___
> Emc-users mailing list
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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] CANopen configuration files, CiA 309-3

[Gene Heskett]

On Monday 18 March 2019 05:34:31 Peter Blodow wrote:

> Sorry, error: of course, gassing  d e creases capacity and increases
> resistance of lead cells!
> Peter
>
> Am 18.03.2019 um 10:19 schrieb Peter Blodow:
> > Nicklas, as soon as a lead-acid battery bubbles, it's losing water
> > and the plates cover with lead sulphate, increasing capacity and
> > intrinsic resistance. No, no.
> > I got myself a handful of cheap 74N137 stabilizers. These are made
> > espacially by Motorola to maintain a constant charging voltage of
> > 13.7 V which is the exact limit before the gassing occurs.

This should be adjusted for battery ambient temp. At -25F, and after 
starting big American V8's, they can go as high as 17 volts. That 13.7 
is at the usual test temp of 27C. Run it on up to nearly 200F on a hot 
day its just covered 20 miles in traffic and it drops another 3/4ths of 
a volt. That special regulator I built had 5 si diodes in series as part 
of its reference voltage to furnish the needed negative comp to the temp 
curve. Some of the 1950's mechanicals had that much in their springs, 
but I've not noted a modern factory regulator having that much 
compensation, probably because it made the batteries last too long.

The worst thing thats happened to te life of a LA battery in the last 50 
years has been the incorporation of the regulator into the alternator, 
adding the resistance of the cable which softens the curve a lot, and 
the relatively quick heating of the alternator.  Way faster than the 
battery. Late vehicles are doing good to get 4 years out of a battery.  
The wife's 2007 toy RAV4 is on its 4th battery now, and I don't believe 
the acid has ever gotten up to 1.26 SG even after a 600 mile trip to FL, 
or a 435 mile trip to NY from here. She has kin in both places she'll 
never see again unless they come to us.

> > The 
> > current they deliver is limited to 1 A. I placed them inside the
> > housing of several 12 V DC wall warts together with a small
> > electrolytic capacitor. The transformers of these little power
> > supplies give more than 15 V AC so there is enough headroom for
> > regulating.
> > Using those chargers the batteries of my vehicles are kept in
> > perfect shape all winter and in summer, too, when the tractor is not
> > in use. I have been using them for years now.
> > Peter

They sell them as maintenance chargers, typically 2 amp. I have several 
plugged in right now, including the one on the boat battery.  And since 
the toy isn't moving very often, I have one on it just to keep the 
computer alive. Without it, the battery is dead and terminally sulfated 
in 2 weeks.  Works great on the rider too.
> >
> > Am 17.03.2019 um 22:56 schrieb Nicklas Karlsson:
> > /snip/
> >
> >> I am familiar with CANopen communication and also to some degree
> >> battery charging. The old style open Lead-acid batteries should
> >> bubble like home brewn mash before they are done.
> >> Nicklas Karlsson
> >
> > ___
> > Emc-users mailing list
> > Emc-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/emc-users
>
> ___
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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] Spindle motor coolant advice needed

[Todd Zuercher]

Don't discount pump heating of the water.  Last week I was working on one of 
our machines that was down with several issues (much larger spindle 19hp).  One 
of the problems was the cooling fan for the water was dead.  It was a lower 
priority than some of the other problems, so I was working on it for a couple 
of hours with the power on, then went look at the cooler and I was shocked at 
how warm the water was.  Without the spindle running at all, in the time I 
worked on the machine, the water temp had risen from room temp to about 3 times 
higher than it normally is with the spindle cutting and the cooling fan 
working.  The fan and radiators are very important on this 5 gallon cooling 
system.

Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street 
Dalton, Ohio 44618
Phone:  (330)828-2105ext. 2031

-Original Message-
From: Ken Strauss  
Sent: Friday, March 15, 2019 3:03 PM
To: 'Enhanced Machine Controller (EMC)' 
Subject: Re: [Emc-users] Spindle motor coolant advice needed

> -Original Message-
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: Friday, March 15, 2019 1:44 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Spindle motor coolant advice needed
>
> When I had a coolant tank, for a different purpose, I put automatic "anti
> freeze in the water.   It is make just for this purpose and is
> non-corrosive with materials used in car engines.
>
> Also, if the water recirculates it will eventually warm up.  I put a 12
> volt fan on the tank lid and made it into an evaporative cooler.Then
> you top off the tank with new water now and then.  If the water is 
> taking even 25 watts of heat from the system it will heat up quite a 
> lot unless you rig some kind of cooling.
>

How about using a radiator like
https://www.amazon.com/Computer-Radiator-Water-Cooling-Cooler/dp/B079DHJ91F/
which is intended to cool CPUs? It comes with mountings for three 120mm muffin 
fans.




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Re: [Emc-users] CANopen configuration files, CiA 309-3

[Peter Blodow]

Sorry, error: of course, gassing  d e creases capacity and increases 
resistance of lead cells!

Peter

Am 18.03.2019 um 10:19 schrieb Peter Blodow:
Nicklas, as soon as a lead-acid battery bubbles, it's losing water and 
the plates cover with lead sulphate, increasing capacity and intrinsic 
resistance. No, no.
I got myself a handful of cheap 74N137 stabilizers. These are made 
espacially by Motorola to maintain a constant charging voltage of 13.7 
V which is the exact limit before the gassing occurs. The current they 
deliver is limited to 1 A. I placed them inside the housing of several 
12 V DC wall warts together with a small electrolytic capacitor. The 
transformers of these little power supplies give more than 15 V AC so 
there is enough headroom for regulating.
Using those chargers the batteries of my vehicles are kept in perfect 
shape all winter and in summer, too, when the tractor is not in use. I 
have been using them for years now.

Peter


Am 17.03.2019 um 22:56 schrieb Nicklas Karlsson:
/snip/
I am familiar with CANopen communication and also to some degree 
battery charging. The old style open Lead-acid batteries should 
bubble like home brewn mash before they are done.

Nicklas Karlsson




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Re: [Emc-users] CANopen configuration files, CiA 309-3

[Peter Blodow]

Nicklas, as soon as a lead-acid battery bubbles, it's losing water and 
the plates cover with lead sulphate, increasing capacity and intrinsic 
resistance. No, no.
I got myself a handful of cheap 74N137 stabilizers. These are made 
espacially by Motorola to maintain a constant charging voltage of 13.7 V 
which is the exact limit before the gassing occurs. The current they 
deliver is limited to 1 A. I placed them inside the housing of several 
12 V DC wall warts together with a small electrolytic capacitor. The 
transformers of these little power supplies give more than 15 V AC so 
there is enough headroom for regulating.
Using those chargers the batteries of my vehicles are kept in perfect 
shape all winter and in summer, too, when the tractor is not in use. I 
have been using them for years now.

Peter


Am 17.03.2019 um 22:56 schrieb Nicklas Karlsson:
/snip/
I am familiar with CANopen communication and also to some degree 
battery charging. The old style open Lead-acid batteries should bubble 
like home brewn mash before they are done.

Nicklas Karlsson




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