On 9/3/2013 3:24 AM, Charles Steinkuehler wrote:
On 9/2/2013 7:14 PM, Kirk Wallace wrote:
On 09/02/2013 03:38 PM, Charles Steinkuehler wrote:
I have a new version of the MachineKit image for running LinuxCNC on a
BeagleBone available:
Image:
http://bb-lcnc.blogspot.com/p/machinekit_16.html
An important spec to look for in any motor is the stall torque to give
an idea of its ability to move a dead load like a machine table that
also has stiction (stationary friction) and any other load on the
table to overcome.
Note power is the product of torque and rpm
the formulas are on
Am 05.09.2013 um 08:28 schrieb Paul Lacatus p...@paul-lacatus.ro:
On 9/3/2013 3:24 AM, Charles Steinkuehler wrote:
On 9/2/2013 7:14 PM, Kirk Wallace wrote:
On 09/02/2013 03:38 PM, Charles Steinkuehler wrote:
I have a new version of the MachineKit image for running LinuxCNC on a
BeagleBone
Hello group;
An old friend contacted me recently about problems he has been having with his
hobby mill. I say hobby because the man is a top notch surgeon who does mainly
reconstruction of destroyed hands.
His hobby mill looks to be a late 70's vintage CNC knee mill with a 2 or 3 hp
On Thu, 9/5/13, Greg Bentzinger skullwo...@yahoo.com wrote:
Hello group;
An old friend contacted me recently about problems he has
been having with his hobby mill. I say hobby because the man
is a top notch surgeon who does mainly reconstruction of
destroyed hands.
His hobby mill looks
On 5 September 2013 05:40, Gregg Eshelman g_ala...@yahoo.com wrote:
The old motors were 5.8 amp cont, 30 amp peak. Stall torque 3NM cont. Max RPM
2400. Max voltage 140 DC
140V * 30A = 4200W
140V * 5.8A = 800W
3Nm * 2400 rpm = 750W
You probably want at least 750W motors, geared to suit any
On Wed, Sep 4, 2013 at 2:15 PM, Kirk Wallace kwall...@wallacecompany.comwrote:
On 09/04/2013 09:56 AM, Kirk Wallace wrote:
... snip
I tried AXIS but got:
http://www.wallacecompany.com/machine_shop/LinuxCNC/Screenshot-3.png
so I guess AXIS doesn't work with the BBB.
Now, on to
On Thu, Sep 5, 2013 at 2:55 AM, emc-users-requ...@lists.sourceforge.netwrote:
I bought a BBB card for using on my little MF70 CNC. I am looking for a
while on internet but did not found anything about using a BBB with a
cape or connection to emulate the parallel port by BBB GPIO. I have
On 5 September 2013 08:11, Greg Bentzinger skullwo...@yahoo.com wrote:
What he would like to do is replace the amps and control, re-using servos and
existing limit switch wiring and power supplies.
...
I will likely use one of the 5i25 combo's for I/O. I am considering showing
him touchy
On 5 September 2013 10:36, Bob Weiss bweiss0...@gmail.com wrote:
It would be nice though if there was such a Parallel Port Breakout type
board pre-made for those that need that option and provided the connectors
ready to be wired up..
I made one for the Raspberry Pi:
On Thu, 9/5/13, andy pugh bodge...@gmail.com wrote:
Subject: Re: [Emc-users] Servo motor watts VS torque?
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Date: Thursday, September 5, 2013, 3:19 AM
On 5 September 2013 05:40, Gregg
Eshelman g_ala...@yahoo.com
wrote:
On 04.09.13 15:21, andy pugh wrote:
On 4 September 2013 14:05, Stuart Stevenson stus...@gmail.com wrote:
Oil bath bearings in the bottom of a gearbox are bathed in ALL of the wear
particles of the gear train - not a good situation.
That's an interesting point.
I guess it is possible
2013/9/5 Gregg Eshelman g_ala...@yahoo.com
On Thu, 9/5/13, andy pugh bodge...@gmail.com wrote:
Subject: Re: [Emc-users] Servo motor watts VS torque?
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Date: Thursday, September 5, 2013, 3:19 AM
On 5 September 2013
I've RTFM and Googled but I can't find an idiot's guide to creating a
lead screw compensation table for Linuxcnc. Is my googlefu weak or is
there no such thing?
...or do I actually need one at all?
As background (Hello! and Warning Newbie Alert!) I have a metric
WMD30LV (big brother to the
On 09/05/2013 02:31 AM, Mark Wendt wrote:
On Wed, Sep 4, 2013 at 2:15 PM, Kirk Wallace
kwall...@wallacecompany.comwrote:
On 09/04/2013 09:56 AM, Kirk Wallace wrote:
... snip
I tried AXIS but got:
http://www.wallacecompany.com/machine_shop/LinuxCNC/Screenshot-3.png
so I guess AXIS
Gregg Eshelman wrote:
What I'm looking for is for each type of motor (AC and BLDC) is You want at
least x watts and n amps to at least be in the same range as the old motor.
On cncdrives.com I noticed the torque values listed are different for AC and
DC motors of the same watts.
The old
On 5 September 2013 19:08, Russell Brown russ...@lls.lls.com wrote:
Were the 'errors' I showed (~.015mm over a 50mm move) in the right ball
park for a non-ball-screw benchtop mill driven by steppers?
Not brilliant, but then I doubt that the machine is driven by
super-precision screws.
Should
Quoth bodge...@gmail.com.
On 5 September 2013 16:33, Russell Brown russ...@lls.lls.com wrote:
Is this the sort of thing that a screw compensation table is meant to
deal with? If so, how do I actually measure the numbers for the table?
Then just run up the table, G0 X10, note the reading
On 09/05/2013 02:53 AM, andy pugh wrote:
On 5 September 2013 08:11, Greg Bentzinger skullwo...@yahoo.com
wrote:
What he would like to do is replace the amps and control, re-using
servos and existing limit switch wiring and power supplies.
...
I will likely use one of the 5i25 combo's for
On 5 September 2013 16:33, Russell Brown russ...@lls.lls.com wrote:
Is this the sort of thing that a screw compensation table is meant to
deal with? If so, how do I actually measure the numbers for the table?
Normally it is quite difficult. But as you have glass scales then it
seems like it
I still don't see a
benefit in using a BB with a Bridgeport class machine
I tend to assume that a single-board computer like the Beaglebone would
be more reliable than a desktop PC, just because it has fewer moving
parts.
Anyway, you can compute the linear force a ballscrew can exert from
some given motor torque, and then compute how much acceleration in
G's that will give. That is a good exercise, rather than talking about
motor Watts.
Jon
...which you can do with my calc sheet posted earlier. :)
/S
Greg Bentzinger wrote:
Hello group;
An old friend contacted me recently about problems he has been having with
his hobby mill. I say hobby because the man is a top notch surgeon who does
mainly reconstruction of destroyed hands.
His hobby mill looks to be a late 70's vintage CNC knee mill
What are the DRO readings vs. commanded position at regular intervals along
the entire length of travel?
On Thu, Sep 5, 2013 at 1:20 PM, andy pugh bodge...@gmail.com wrote:
On 5 September 2013 19:08, Russell Brown russ...@lls.lls.com wrote:
Were the 'errors' I showed (~.015mm over a 50mm
On 9/5/13 7:07 AM, Gregg Eshelman wrote:
On Thu, 9/5/13, andy pugh bodge...@gmail.com wrote:
Subject: Re: [Emc-users] Servo motor watts VS torque?
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Date: Thursday, September 5, 2013, 3:19 AM
On 5 September 2013
If you do bidirectional compensation then backlash does not apply.
I think I would adjust the scale to get the numbers to match as good as
possible. Then the compensation values would be small.
On Thu, Sep 5, 2013 at 1:20 PM, andy pugh bodge...@gmail.com wrote:
On 5 September 2013 19:08,
On Thu, 2013-09-05 at 20:19 -0400, Kerry Lynn wrote:
On 9/5/13 7:07 AM, Gregg Eshelman wrote:
On Thu, 9/5/13, andy pugh bodge...@gmail.com wrote:
Subject: Re: [Emc-users] Servo motor watts VS torque?
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Date:
On Thu, 9/5/13, Sven Wesley svenne.d...@gmail.com wrote:
I don't know what your machine looks like, but I think many
people believe
they need much larger servos than actually needed. My steel
router has a
gantry weight around 80-90 kg and is driven by small Nidec
servos rated at 80 V
Ron Bean wrote:
I still don't see a
benefit in using a BB with a Bridgeport class machine
I tend to assume that a single-board computer like the Beaglebone would
be more reliable than a desktop PC, just because it has fewer moving
parts.
All Bridgeport mill and Romi lathes made
Were the 'errors' I showed (~.015mm over a 50mm move) in the right ball
park for a non-ball-screw benchtop mill driven by steppers?
This sounds well within then range if normal screws if not better than I
would have expected. Another way of looking at this is it is 0.03% error.
Very small.
Has anyone done a DIY plasma table, or have suggestions I could find
out about a DIY version?
I am a rookie and just learning, wanting to find out if it could be
practical for a hobby setup.
TIA, Jack
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