There's not a lot of load so manually indexing a rotary table 142 times to cut
a metal ring gear is tedious but only needs to be done once. After that with
the rest in plastic you have the 4th axis.
John
> -Original Message-
> From: Matthew Herd [mailto:herd.m...@gmail.com]
> Sent: Dec
aded inserts, about 80 places. I find it helps to think if
> each holes gets larger or smaller then design when it is printed. and this
> depends on ho the hole is connected to the rest of the part. By walls or
> sheets or infill.. Engineering is fun...
>
> On Mon, Dec 20, 2021 at 1
parts. They fail by
> > >
> > > the
> > >
> > > > failure of interlayer adhesion. Think of printed plastic like it is
> > > > soft
> > > > pine wood. When making gears from yellow pine, the direction of the
> > >
> > > grai
[mailto:albertson.ch...@gmail.com]
> Sent: December-20-21 10:29 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Harmonic Drive
>
> On Mon, Dec 20, 2021 at 5:35 PM gene heskett wrote:
>
> > On Monday, December 20, 2021 7:03:21 PM EST John Dammeyer wrote:
> From: John Dammeyer [mailto:jo...@autoartisans.com]
>
> I'm headed in the other direction since I'd like LCNC to make it. First I
> have to reprint the ring gear though. Would be much smarter
> to actually make it with 142 teeth instead of 140. I'll try a dif
Hey Chris,
I suspect that Todd's version of the reduction drive may work. You do have to
be able to create two ring gears with different #'s of teeth and 3 planets with
two sets of teeth. A small version with a lower module gear size could
probably be set up to use stock bearings.
CNC is the
Here's the 140 Tooth cup and 147 Spline for a 20:1 ratio with 0.5 module gear
teeth. No backlash in fact a bit tight. ID of cup is 68.5mm so a bit smaller
than the original one (82mm ID) with the big teeth and 1.25 module (36:1).
Only problem is the cup gear layer changes were all in one row
> From: gene heskett [mailto:ghesk...@shentel.net]
>
> On Wednesday, December 22, 2021 4:24:30 AM EST John Dammeyer wrote:
> > Here's the 140 Tooth cup and 147 Spline for a 20:1 ratio with 0.5 module
>
> That's a rule violation for a two point drive, the co
put shaft. Ratio is 36:1 with the 70 and 72T forms and
direction is the same as the motor.
This also turns more easily than Todds dual ring gear and triple pulley but to
be fair, I don't have any ball bearings or support structure on that one yet.
John
> From: John Dammeyer [mailto:jo..
Everyone is probably partying or drinking egg nog this close to Christmas but
on one of the local metal groups a new member posted that he was converting his
mill to CNC.
His first posting:
"Just doing a cnc conversion to my Craftex knee mill, using the Acorn cnc board
and Clearpath Nema 34 s
y decades ago.
Now it's all done with computers. I'm not sure there are even people around
who could design something like this that is fully mechanical.
John Dammeyer
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.
; parts will take the heat warming helps drive the epoxy cure. Roughly 10
> degrees C doubles the reaction rate. 175 F or 80 C is a good place to
> start. Assuming RT is 20 then 80-20 = 60 or 2^6 X. Naturally one may
> have to back off the temp for wimpy thermoplastics. ;-)
>
> Dave
>
> From: Andy Pugh [mailto:bodge...@gmail.com]
> > On 24 Dec 2021, at 10:46, J�r�mie Tarot wrote:
> >
> > "my" idea along this line would be to develop/document
> > a set of "reference implementations"
>
> There are some case studies in the Wiki. However these are probably rather
> out of date a
trol or monitor prints from any screen.Any
> > > screen in the building or in my pocket could control any screen with no
> > > handoff required. Just sign-on and your work is there.
> > >
> > > The problem is that all of the above would take many man-years of
>
ophisticated.
And perhaps the best example of all is the Tormach LCNC interface which also
simplifies things because in this case the hardware is known.
So if you are content with command line/editor operations great. I'm happy
it's working for you. But if we want more users inv
d Christmas day interesting anyway.
John
> -Original Message-
> From: John Dammeyer [mailto:jo...@autoartisans.com]
> Sent: December-23-21 9:12 PM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] Complex 6 axis robot arm.
>
> I bought one of
iginal Message-
> From: Mark [mailto:wendt.m...@gmail.com]
> Sent: December-26-21 5:41 AM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Choice of CNC conversions
>
> On 12/25/21 12:59 PM, John Dammeyer wrote
>
> > LinuxCNC is a GNU user space component unt
As is this one:
https://www.youtube.com/watch?v=8LVX380iDIk
which includes how to do some python programming calculations.
Again for those who want to dive that deep, they are already using LCNC.
John
> -Original Message-
> From: Bari [mailto:bari00...@gmail.com]
> Sent: December-26-21
> From: Mark [mailto:wendt.m...@gmail.com]
> > The excuses that will be made for no documentation will be the same ones
> > given for command line operation of Linux and LCNC.
> It's much better than windows or it's self documenting. You just have to
> learn a few commands and you can do so much
> From: Stuart Stevenson [mailto:stus...@gmail.com]
> LinuxCNC is not Staples. There is no Big Red easy button.
Doesn't mean that there can't be a Big Red easy button for a basic install.
> A lot of words to say this. The LinuxCNC developers (past and present) give
> their time and effort to this
controller or hardware buttons on a Mesa card
> >> would be kinda cool to implement.
> >>
> >> Phil T.
> >> The Feral Engineer
> >>
> >> Check out my LinuxCNC tutorials, machine builds and other antics at
> >> www.youtube.com/c/theferalengi
Small progress report on Todd's version of the harmonic drive.
I added a back mount that holds a 19x40x12 bearing. A cap to hold the bearing
in place. Then a new drive arm sized to 19mm and a 19x1.25mm thread along
with a nut. The end of the drive shaft has an 8mm hole for the stepper moto
For fun I created Todd's version with 0.5module gears. The OD of the assembly
is now 60mm compared to 150mm. It would now be possible to choose a far east
harmonic drive tapered roller assembly to hold the driven gear in place.
Although they are expensive.
Not sure what type of bearings,
lto:emc-users@lists.sourceforge.net]
> Sent: January-03-22 4:44 AM
> To: Enhanced Machine Controller (EMC)
> Cc: grumpy
> Subject: Re: [Emc-users] Harmonic Drive
>
> January 3, 2022 9:54:10 AM CET John Dammeyer wrote:
> For fun I created Todd's version with 0.5module g
internally thread M3
> or M4 holes all the way through then I fill the hole with CA glue and put
> in a long screw. I call it "steel reinforced plastic".Like rebar in
> concrete.
>
>
>
> On Mon, Jan 3, 2022 at 12:57 AM John Dammeyer
> wrote:
>
> > For fun
eforge.net
> Cc: fxkl4...@protonmail.com
> Subject: Re: [Emc-users] Harmonic Drive
>
> On Mon, 3 Jan 2022, John Dammeyer wrote:
>
> > Just go back on this subject to older postings from Todd where he posted
> > the FreeCAD files. I then used those to create step files
> and
Interesting concept. I notice that although he showed his finger pushing on
the jaws (and text said compensation turned off) we never saw him disturb the
jaws with compensation on. That he can position accurately is pretty cool.
But backlash on my X axis results in the milling cutter pulling
ster. It is because he has better data.
> https://youtu.be/GCHXNcpq3OA
>
>
> On Mon, Jan 3, 2022 at 7:02 PM John Dammeyer wrote:
>
> > Interesting concept. I notice that although he showed his finger pushing
> > on the jaws (and text said compensation turned of
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
>
> On Wed, Jan 5, 2022 at 3:29 AM Gregg Eshelman via Emc-users <
> emc-users@lists.sourceforge.net> wrote:
>
> > That repeatability is plenty good enough to drop work into an automatic
> > holding fixture (which does the final precision
gt; I was also confused by machine kit reference from tormach. I thought
> > tormach was based on linuxcnc and not the machine kit branch/fork
> >
> > although I guess if Tormach are running a 2.7 linuxcnc version I guess you
> > could say they have their own branch/fo
So my Collet chuck arrived a week or so ago. Today the ER-32 collet set
arrived. I no longer have an excuse for not completing my 4th axis driven by a
real harmonic drive. (Well it is raining and can't cast). So I have drawn up
the face plate adaptor and that looks to be a pretty easy LCNC p
ER-32 Collet Wrench
>
> https://www.amazon.ca/ER-32UM-Spanner-Precision-Milling-Clamping/dp/B089RXC7K1
> ca$18.50 delivered tomorrow.
>
> -----Original Message-
> From: John Dammeyer
> Sent: January 12, 2022 3:48 AM
> To: Enhanced Machine Controller (EMC)
> S
rench
>
> I'm over 100KM from Toronto but Amazon still promises delivery to here
> tomorrow. I thought that you were in Vancouver...
>
> -----Original Message-
> From: John Dammeyer
> Sent: January 12, 2022 12:53 PM
> To: 'Enhanced Machine Controller (EMC)&#
And it should be here next Wednesday. I have so many projects on the go I
really don't need another one and with this one I can buy my way out.
> -Original Message-
> From: John Dammeyer [mailto:jo...@autoartisans.com]
> Sent: January-12-22 10:14 AM
> To: 'Enhan
servo which can also run on much higher voltages to counter that back EMF.
So whether LCNC does the closed loop control or a separate driver board
messaged by step/dir or serial commands the limitations of the motor
architecture still exist. And the price to get a motor that can create simi
22 11:36 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] ER-32 Collet Wrench
>
> On Wednesday, January 12, 2022 3:47:37 AM EST John Dammeyer wrote:
> > So my Collet chuck arrived a week or so ago. Today the ER-32 collet
> > set arrived. I no longer have an
Amazon delivered it a few minutes ago.
> From: John Dammeyer [mailto:jo...@autoartisans.com]
>
> Thanks Gene,
> Amazon says it will be here on Tuesday so doesn't look like it will be an
> issue.
>
> John
>
>
> > From: gene heskett [mailto:ghesk...@she
> > From: andy pugh [mailto:bodge...@gmail.com]
> >
> > But, making patterns and having parts cast is _fun_ :-)
> >
> > --
> > atp
>
> Oh and here's the core box.
First crack at the core using the instructions from Dave Gingery's building a
lathe from scrap series.
Very fine sand, 20 Table Spoo
Hi Sam,
So how exactly are you going to count it?Time between the top trace edge
and the bottom trace edge? As you cross the threshold into the next 0.1" and
it mechanically jitters at that point what will you do to not have counts go
wild?
John
> -Original Message-
> From: Sam So
Take a grinder to the motor shaft and make a flat on it. Then tighten the
setscrew on the flat with some Loctite on the threads or a second setscrew
behind it if you have the room.
John
> -Original Message-
> From: Ralph Stirling [mailto:ralph.stirl...@wallawalla.edu]
> Sent: January-
www.automationtechnologiesinc.com/download/9259/
Notice the curve at 3000 half steps per second is about 3.2NM. That's 12,000
steps per second (7.5RPS) with 8 micro-steps per step well within the reach of
even a parallel port controller and 450 oz-in. That's well above the 1 RPS
In wanting to automate this grinder exactly how many axis do you want to
control.
I can see the movement of the table back and forth at that 1 RPM. I can see
the cross slide at the end of each pass or pass and return?
Finally I guess depth might also be desired to a total depth?
If depth was ad
ymin, ymax. Set a mode. Select a stepover. Hit go.
>
> Martin pointed me at the teensy computers. They have a 3.2 inch touch
> screen that might be just the thing to control this. The stepper library
> should do the job very nicely.
>
> Ken
>
> Kenneth Lerman
> 55 Ma
mance but they do need to be used correctly ... sadly,
> in most amateur applications they are not.
>
> If the corner frequency with your drive and voltage is at around 2000 steps
> per second and you are only ever delivering 1000 steps per second, you can
> never got more than half
more complex. We have
> these so-called "closed loop stepper drivers and also a few people are
> running the steppers as if they were many-pole BLDC analog (continuous,
> non-stepping) mortors
>
> On Fri, Feb 4, 2022 at 2:39 PM John Dammeyer wrote:
>
> > I disagree
torque drops off, power is constant. You are perhaps confusing the raw
> > torque/speed curve of a motor fed from a constant voltage source, which is
> > useful but is not how they are typically used in practice.
> >
> >
> > https://res.cloudinary.com/engineering-com
ject: Re: [Emc-users] What Would You Suggest?
>
> I believe the flat part of the curve is defined by the motor thermal limits.
> Is this correct?
>
> > On Feb 5, 2022, at 11:44 AM, John Dammeyer wrote:
> >
> > ?All fine and good but doesn't help anyone choose
> -Original Message-
> From: Thaddeus Waldner [mailto:thadw...@gmail.com]
> Sent: February-05-22 8:26 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] What Would You Suggest?
>
>
>
> > On Feb 5, 2022, at 6:48 PM, John Dammeyer wrote:
> >
; ... all ... every single one, when connected to a
> current limited driver.
>
> On Sun, 6 Feb 2022 at 00:45, John Dammeyer wrote:
>
> > No. The motors are designed to handle N amperes although they get quite
> > warm that should be a 24/7 rating. Because they get so w
I've done something like that commercially for battery run systems. Using a
latching relay power is applied by a user switching a master switch ON which
latches the relay and now there's power for the control system. Once the
control system is up the main contactor is switched on to supply ful
I'm forwarding this message to the LCNC group before I say anything on the MACH
group. Seems to me that this is far more easily done with LCNC but may require
more knowledge than an average user has.
John
From: mach...@groups.io [mailto:mach...@groups.io] On Behalf Of Brian Martin
Sent: Febr
uxCNCSee this
> related post for the configuration
> files:https://forum.linuxcnc.org/24-hal-components/...
> www.youtube.com
>
>
>
> From: John Dammeyer
>
> I'm forwarding this message to the LCNC group before I say anything on the
> MACH gro
; python (or is willing to learn it) he could hit the ground
> running, that's if he wants to give up Mach 4 that he's so familiar with.
>
> Martin
>
>
> From: andy pugh
> On Mon, 21 Feb 2022 at 19:09, John Dammeyer wrote:
>
&
or the
> task.
>
> With that in mind maybe a robot would be the best thing for this project- but
> not an expensive one:
>
> https://www.youtube.com/watch?v=P2O8KCmVjU0
>
> Martin
>
>
> From: John Dammeyer
>
> Thanks Ma
Here's a quick summary that some may find interesting.
https://www.motioncontroltips.com/what-is-the-canopen-over-ethercat-coe-protocol/
John
___
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-us
I had to clean off my workbench for another project so the Pi4 has been boxed
for a short while. But in mentioning LCNC to a friend who was buying a used PC
(Intel NUC7i5BNH) that he should download the latest LinuxCNC Image and run the
latency test to see how well it would work for LCNC.
I t
Hi Sam,
When you get a chance can you double check those values and which file they are
in? Or even post your HAL/INI files?
Going from memory I think I have the 2GB Pi4. It's possible that lack of RAM
is also the issue?
John
> -Original Message-
> From: Sam Sokolik [mailto:samco...
15/dp/B09GRL3VCN/ref=asc_df_B09GRL3VCN/?tag=hyprod-
> 20&linkCode=df0&hvadid=563598683736&hvpos=&hvnetw=g&hvrand=7967367747260015957&hvpone=&hvptwo=&hvqmt=&hvd
> ev=c&hvdvcmdl=&hvlocint=&hvlocphy=9031026&hvtargid=pla-1457086693568&th=1
&g
Hi Sam,
I cannot find the equivalent of cmdline.txt on my Pi4 LinuxCNC system. This is
the file that has the Idle=poll etc. Does this mean it's not part of the
default LinuxCNC implementation for a Pi4?
So where does it go and how is it accessed? Is there a how to document for
this?
Thanks
J
gene heskett [mailto:ghesk...@shentel.net]
> Sent: March-06-22 9:57 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Pi4 with LinuxCNC and MESA 7i92H
>
> On Sunday, 6 March 2022 23:20:41 EST John Dammeyer wrote:
> > Hi Sam,
> > I cannot find the equivalent of c
What 'FF' that isn't running?
> -Original Message-
> From: gene heskett [mailto:ghesk...@shentel.net]
> Sent: March-07-22 4:19 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Pi4 with LinuxCNC and MESA 7i92H
>
> On Monday, 7 M
> From: Peter C. Wallace [mailto:p...@mesanet.com]
> > From: John Dammeyer
> > Thanks Gene,
> > Didn't even think to look there. Was logged in remotely in the pi user
> > folder and don't have access to the /boot. (Just haven't
> given permissio
Hey Sam,
Speaking of finishing things. Do you ever use your 3D printed reduction drive?
You did all the testing that ensured it was tough and reliable. Just wondering
if it's now a permanent tool.
John
> -Original Message-
> From: Sam Sokolik [mailto:samco...@gmail.com]
> Sent: March
com]
>
> Haven't actually machined anything with the rotary axis yet. Got side
> tracked again... No issues so far though..
>
>
>
> On Sat, Mar 19, 2022 at 9:18 PM John Dammeyer
> wrote:
>
> > Hey Sam,
> > Speaking of finishing things. Do you ever use your
Because I can't seem to finish anything... Nebel
> lathe conversion.
>
> On Sunday, 20 March 2022 16:46:17 EDT John Dammeyer wrote:
> > Story of my life. Fan failed on 3D printer. Repaired feed tube and
> > replaced with ball bearing fan I had from power supply manufactur
I have 3 Beaglebones in my kennel; a Rev B with the 2GB eMMC and two Rev C with
the 4GB eMMC. Additionally a cape that lets me run MachineKit (that microSD
card is in the Rev B). Another cape called a Replicape for 3D printing. Some
prototype boards, LCD capes, RS485/CAN capes.
I've been pla
Mine only has 60 teeth and they aren't symmetrical but I didn't find any
problems with rigid tapping.
John
> -Original Message-
> From: Sam Sokolik [mailto:samco...@gmail.com]
> Sent: March-31-22 6:54 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Homebuilt encoder
Works fine from WIN-7/WIN-10/Samsung phone.
> -Original Message-
> From: Lawrence Glaister [mailto:ve...@shaw.ca]
> Sent: March-31-22 12:22 PM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Homebuilt encoder
>
> very strange... working fine here. maybe try the http versi
> From: andy pugh [mailto:bodge...@gmail.com]
>
> On Thu, 31 Mar 2022 at 18:14, Chris Albertson
> wrote:
>
> > A trick used in automotive sensors is to have one missing slot. Then
> > software resets the counter when the expected pulse does not happen
>
> LinuxCNC can use these target wheels
> From: andy pugh [mailto:bodge...@gmail.com]
>
> On Thu, 31 Mar 2022 at 23:02, John Dammeyer wrote:
>
> > Any idea where the source code is for that encoder missing tooth tracking?
> > Looks like it would be an interesting read.
>
>
> It's in here so
> -Original Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: March-31-22 4:17 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Homebuilt encoder
>
> On Fri, 1 Apr 2022 at 00:08, John Dammeyer wrote:
>
> > Thank you.
> From: andy pugh [mailto:bodge...@gmail.com]
>
> On Fri, 1 Apr 2022 at 00:28, John Dammeyer wrote:
>
> > That's the way I'd do it.
>
> Not sure what we are discussing here. That is the way that I did it. :-)
Sorry. Didn't mean to offend. It was a com
When I changed over from a 2HP 220VAC motor to an AC Servo for the spindle
motor I knew it was also time to look at spindle encoding. Cost of the AC
Servo was just under half of a 2-phase 2HP + VFD.
If I was running toothed belts it would be a no brainer to use the AC Servo
drive encoder outpu
Exciting!
> -Original Message-
> From: Sam Sokolik [mailto:samco...@gmail.com]
> Sent: April-09-22 6:27 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Because I can't seem to finish anything... Nebel
> lathe conversion.
>
> X is almost ready to test...
>
> https:
Really nothing to do with LCNC or even automation.
I've been cleaning out old shelves and I have piles of Popular Electronics
Magazines. This one from December 1965 (yes, almost 57 years old) has an
article on how to improve model trains so they start slowly or crawl rather
than lurching fo
gt; Sent: April-10-22 2:29 AM
> To: Enhanced Machine Controller (EMC)
> Cc: Gregg Eshelman
> Subject: Re: [Emc-users] Controlling DC motors.
>
> In other words the person who designed that created a pulse width modulation
> motor controller without calling it that.
>
>
&g
Apr 10, 2022 at 4:55 AM Mark wrote:
> >
> >> Beat me to it. I was just about to say the exact same thing.
> >>
> >> What comes around goes around.
> >>
> >> Mark
> >>
> >> On 4/10/22 05:28, Gregg Eshelman via Emc-users wrote
A friend of mine has run hydraulics that way.
What you say makes a lot of sense for the model trains too. My little PWM DC
speed controller was set above 20kHz to prevent audible noise. But that's a
lot different from 60Hz that would, as you say, introduce vibration to overcome
static frict
Nice!
Was the Z axis lead screw also a ball screw or did you leave that as ACME? Has
it an anti-backlash nut if still ACME?
John
> -Original Message-
> From: Sam Sokolik [mailto:samco...@gmail.com]
> Sent: April-17-22 6:47 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc
> lathe conversion.
>
> On Sunday, 17 April 2022 22:19:58 EDT John Dammeyer wrote:
> > Nice!
> >
> > Was the Z axis lead screw also a ball screw or did you leave that as
> > ACME? Has it an anti-backlash nut if still ACME? John
> >
> Who are you as
Ask yourself this question.
If a wire connecting to the limit switch or ESTOP breaks or becomes
intermittent does the system safely stop?
One of the biggest reasons for using NC type switches (or PNP) is that a
failure in the power or wiring to them also causes a stop.
John
> -Original Me
appears to be no updates on the other repositories. That means
> updates are required for new operation systems. They now use cmake-5.22
> for example.
>
> Murray
>
> On Wed, 30 Mar 2022 at 22:26, John Dammeyer wrote:
>
> > I have 3 Beaglebones in my kennel; a Rev B with
Not having seen the press brake I'm curious about the need for back gauge
up/down setting. Why would a press brake even have this?
Is it because the bent section behind the press may be up at an angle and
therefore miss the back gauge? If so, how much movement is there in the
up/down direct
y of the more advanced
> brakes can adjust each backstop vertically and left-right
>
>
>
> On Tue, 26 Apr 2022 at 17:52, John Dammeyer wrote:
>
> > Not having seen the press brake I'm curious about the need for back gauge
> > up/down setting. Why would a press brake
You could refine your search for 'gage' pressure.
For example:
https://www.mouser.ca/ProductDetail/Honeywell/TBPLLNN015PGUCV?qs=sGAEpiMZZMvWgbUE6GM3ORZWIiwl0bZWTYn43VfoT8%2FWbX7uba9%252Bdg%3D%3D
Or just go to Mouser and look for this part number.
785-TBPLLNN015PGUCV
There are also inexpensive u
Love the coolant head. Very similar to what I started to make but is still on
the to do list.
John
> -Original Message-
> From: Dan Bloomquist via Emc-users [mailto:emc-users@lists.sourceforge.net]
> Sent: June-03-22 11:49 AM
> To: emc-users@lists.sourceforge.net
> Cc: Dan Bloomquist
>
OK. I realize this will be a dumb question but please bear with me especially
since I've included the ability to accelerate in my Electronic Lead Screw
project.
A friend and I were discussing bringing a 300 pound flywheel up to speed.
Vz=0 RPM, Vf=50 RPM. Reduction drive to the flywheel shaft
Addendum to this:
https://www.orientalmotor.com/motor-sizing/rotaryDevice-sizing.html#QuickReport
I chose a 24" disk, 5 seconds to get up to 50 RPM.
> -Original Message-
> From: John Dammeyer [mailto:jo...@autoartisans.com]
> Sent: June-16-22 5:50 PM
> To: Enhanced M
t; From: gene heskett [mailto:ghesk...@shentel.net]
> Sent: June-16-22 6:34 PM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Acceleration question.
>
> On 6/16/22 20:54, John Dammeyer wrote:
> > OK. I realize this will be a dumb question but please bear with
wheel (the parts add up) So divide
> the wheel into (say) a rim, a thin disk and a hub find the moment of each
> and then add them.
>
> But the string experiment is easier.
>
> On Thu, Jun 16, 2022 at 5:53 PM John Dammeyer
> wrote:
>
> > OK. I realize this will b
you
> > > wrapped the string around.
> > >
> > > Make the weight bigger until it works, then buy a motor that can supply
> > > that torque, plus a bit more.
> > >
> > > if you really want to calculate the moment, perhaps because you have not
> &
ick is to watch the units. Keep the rotation units in radians per
> second and acceleration in read/second squared
>
>
>
> On Thu, Jun 16, 2022 at 7:50 PM John Dammeyer <
> <mailto:jo...@autoartisans.com> jo...@autoartisans.com>
> wrote:
>
> > I'
I'm going to guess it won't work with the small KingSpec 8GB that is marked on
the board "7PSATA-1"
John
> -Original Message-
> From: Thaddeus Waldner [mailto:thadw...@gmail.com]
> Sent: June-30-22 10:43 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Pi4 SSD, Micr
Really don't want to pay amazon.ca $25 for that sort of cable since they likely
all come from the same place.
https://www.aliexpress.com/item/32991882020.html
This one is only $5 Cdn with free shipping and I can wait until August for it.
John
> -Original Message-
>
ay amazon.ca $25 for that sort of cable since they
> likely all come from the same
> place.
>
> https://www.aliexpress.com/item/32991882020.html
>
> This one is only $5 Cdn with free shipping and I can wait until August for it.
>
> John
>
>
>
>
> > --
Hi Chris,
I like that idea but the if you are using an Ethernet Based MESA 7i92 then the
Ethernet port should not really be shared with the rest of the system.
Ideally then for the rest of the system there should be a USB 3.0 to Ethernet
Dongle. Or perhaps a SPI bus to Ethernet dongle since
dd-ssd-expansion-board
>
> Maybe you don't have to use USB after all?
>
> https://lemariva.com/blog/2019/09/raspberry-pi-4-ssd-booting-enabled-trim
>
> Martin
>
>
>
>
>
> From: John Dammeyer
>
> Hi Martin,
> Just g
Which particular Synergy model do you use?
> -Original Message-
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: July-02-22 8:52 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Pi4 SSD, MicroSD use
>
> On Sat, Jul 2, 2022 at 6:46 AM Thaddeus Waldner
I also install SAMBA on all the Linux systems so I can get at the folders.
Hopefully both images will be accepted in this email. In this case it's a
BeagleBone Black running an older version of Linux attached to a special card
that emulates an older 20MB MFM hard disk drive connected to an S100
Hi Jon,
Last year I bought a stepper motor driver off Amazon that had an annoying
whine. And it was one of the more popular brands. Couldn't stand it.
I contacted Bergerda in China, who's servos and drives I now use, and asked if
their stepper drivers had the same problem since the outside of
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