Static IP addresses on private networks ensure that things will work and stay
working. I tried using DHCP assigned IP addresses for my printers with built in
network interfaces, and before those the external HP JetDirect network printer
interfaces. The problem was whenever there was a power
Emergency Stop buttons are made so that the knob locks in when pushed and has
to be rotated to unlock it so it can come out. Breakout boards, VFDs, and
various other machine control equipment often has E-Stop inputs which can be
wired in a circuit so one or more buttons can be used to stop
I've read that centripetal force is "pushing inward" which sounds like utter
baloney to me. When anything is spinning, nothing is pushing inward. It's going
around in a circle with every atom attempting to fly outward. If the spinning
thing is hollow and there are loose objects inside it, such
Ethernet is not on USB. The Pi 4 uses new/different controllers for USB 3.0 and
Ethernet so they can run full speed instead of half the speed of USB 2 and half
the speed of 100 megabit Ethernet on the Pi 3. Finally a Raspberry Pi can make
a decent NAS host by connecting a pair of USB3.0
I'm still wanting Stepstick/Pololu screw terminal breakout boards for easy and
rugged connection of external stepper drivers. I could probably design some,
send off to OSHpark or somewhere and have four of them for a $20 in a couple of
weeks, then I'd have to buy the header pins and connectors.
The ProLight PLM 2000 benchtop bed mill used an Animatics servo controller. All
the brains were in the box and it had capabilities to run headless (which
ProLight never used). All the computer did was feed it G-Code and monitor for
over-torque, end stop, and E stop signals.
A search for
de9 to db25 rs232 adapter
Turns up many of them for cheap. A computer shop that's been around long enough
ought to have one or more laying around, might even give it to you to avoid
throwing it away.
Irritating that companies for whom cables are their specialty are using the
SATA port multiplier, or if there's an open PCIe x1 slot get a SATA card for
it. Either can be found cheap on eBay.
On Sunday, May 26, 2019, 10:17:36 AM MDT, Gene Heskett
I'd got an older 60GB Kingston SSD in the dell running the G0704. Linux
only, useing around 15GB of it,
There seems to be a pretty good supply of battery packs from wrecked Tesla
Model S cars, often with fairly low mileage. People have been taking those
apart to shoehorn the modules and one or both motor drivetrains into various
other vehicles. Of course by doing that they lose the crash
ormation. Tesla has adopted the software
rental model where the customer doesn't really own anything.
On 5/18/19 3:06 AM, Gregg Eshelman via Emc-users wrote:> Look up Rich Rebuilds
on YouTube. He built himself a really cheap Tesla Model S by buying one that
was in a flood and another th
That's what I've read about telco backup batteries. They aren't built for rapid
or deep discharge. They're made to sit there for a long time, being float
charged, just waiting for very rare power outages. Thus they are a poor choice
for storage for an off grid power system fed by solar, wind,
These look interesting. Caps that push onto the ends of 18650 cells then snap
together. Metal bus bars connect the cells in any configuration you want.
There are videos on YouTube from various people testing them. The connection
resistance is less than spring clips but
Look up Rich Rebuilds on YouTube. He built himself a really cheap Tesla Model S
by buying one that was in a flood and another that was rolled. Stripped the
flooded one of nearly everything, put the electrics and electronics from the
rolled one into it, then sold a bunch of leftover parts. Now
One of these days I'm expecting to see someone build a power wall style
installation that uses lithium ion power tool batteries plugged into sockets.
Imagine a closet full of Ryobi ONE+ 18 volt batteries. Buy them used, old ones
on clearance etc. The practical aspect is the ONE+ batteries have
What would be very useful is a little PC box made so it's built in peripherals
leave a 64K free space between 640K and 1024K in the default location for LIM
EMS 4.0. Even better would be a 32 megabyte chip on board for a hardware
implementation of EMS. With today's tech-fu that chip could be
Another way to drive both sides with one motor is screw shafts down both sides,
connected at both ends with chains or belts. Use angular contact bearings on
the ends of the screw shafts so they can be put under some tension for high
speed running without whip.
With a physical connection between the two sides, the gantry cannot get out of
square, aside from a serious mechanical problem. It also frees up a motor
driver for other use or eliminates the need for one driver.
The software is also simpler because it doesn't need to be able to ensure that
What about ECP mode, which requires DMA?
Originally the LPT port was output only, no ifs, and, buts, or inputs. Built to
the original specs there should be no way at all to push data into the port.
But naturally some manufacturers didn't stick 100% to the specs. Then various
If you need height clearance for a cross shaft, mount the shaft up high and run
1:1 belts or roller chains down the ends. Or if the table is stiff enough to
only need supports at the ends you can run the shaft under the table, and have
the racks on the bottom so dust and crud can't fall into
Rack teeth are easy to machine because they have straight sides to mesh with
involute gear teeth.
Another method like using the belt is a roller chain stretched between anchor
points and looped under two idlers and over a drive sprocket between and above
or below the idlers.
With any rack or
On Tuesday, April 23, 2019, 2:06:27 AM MDT, Les Newell
What sort of work are you going to use this router for? If you are
processing sheet materials I would strongly recommend using a vacuum
bed. If you are using blanks, vacuum pods work well.
Somewhere I saw a very clever design
With the post and spindle a degree off, that's a likely contributor to various
issues. It would definitely increase forces on the tooling when rigid tapping.
Rather than messing about with shims I'd be taking the thing apart and finding
a shop where I could borrow the use of a bigger mill to
On Sunday, April 21, 2019, 5:47:22 PM MDT, Gene Heskett
On Sunday 21 April 2019 14:51:31 Bruce Layne wrote:
> I don't need to use an impact wrench to tighten and loosen the drawbar
> to prevent TTS tooling from pulling out. Something isn't right there,
> Gene. Maybe some of the
Is that still requiring an internet connection in order to use it? There are
plenty of would-be customers who've said "No way!" to that software because
they don't have and don't want any internet connected computers in their shops.
On Sunday, April 21, 2019, 3:02:33 PM MDT, Gene Heskett
Why not use a 6 point 10mm impact socket?
On Saturday, April 20, 2019, 2:33:55 PM MDT, Gene Heskett
The only way I can be assured that a 3/4" shank of a TTS
Set screw tool holder accuracy is down to how precisely the holders are made. A
lightly oiled tool should pop when pulled out of the holder. Where this type of
holder doesn't do as well as a collet is in heavy production work. They need to
be monitored for getting bellmouthed. A precision rod
The set screw isn't angled, that flat ground into the side of the tool shank is
On Thursday, April 18, 2019, 8:21:46 PM MDT, Ken Strauss
I have used some reasonable quality holders for Weldon shank tools -- Bison
R8 holders and Tormach TTS -- and none had angled
unlike Morse tapers.
On Thursday, April 18, 2019, 8:16:28 PM MDT, TJoseph Powderly
On 04/19/2019 08:36 AM, Gregg Eshelman via Emc-users wrote:
> The Weldon style has a set screw flat that's angled toward the cutting
> Tighten the set screw on it
The Weldon style has a set screw flat that's angled toward the cutting end.
Tighten the set screw on it and the tool is forced upwards until the deeper end
of the flat contacts the side of the set screw. That makes the too resistant to
shifting axially, preventing loosening or shifting of tool
er to the output connector on the CRAMPS board. So you can use the pin header
to run on off board drive. If you are interested I can send you the schematic
for the board. If the link above doesn’t work, here is the URL
> From: Greg
What I've been wanting someone to make are screw terminal breakout boards for
Pololu or StepStick sockets so that Step, Dir, Enable etc connections can be
made to bigger external motor drivers from a CRAMPS, RAMPS and any other small
control board made for use with those little drivers.
If you have Windows 7 or 8 installed you can upgrade for free. Find the
gatherosstate.exe file on the Windows 10 disc or ISO. Copy it to the desktop
and run it. Copy the genuineticket file it creates somewhere off the computer.
Now you can erase the installed Windows and do a clean install of
Three Mile Island and Chernobyl get all the attention because TMI was a
meltdown and Chernobyl exploded and melted, there's a solidified blob of
insanely radioactive stuff in the basement. It used to visibly glow but has
cooled down in temperature over they years.
But the other deadly nuclear
Pebble bed reactors work quite well and are meltdown proof. A core of enriched
uranium pellets are surrounded by seven alternating layers of ceramic and
Detractors of the design claim that there are always cracks in the layers. Big
deal, that's why there are seven layers. The chance
This one has to be too good to be true.
Says it includes 15 100W panels, connecting cables, inverter etc. for $89.
Dunno what else would be required to tie it into a domestic
This guy in Australia tested a cheap $90 100 watt panel and one that cost a lot
more. The $90 panel significantly out performed the expensive
Commenters noted that the cheap panel is using PV cells of the newest
technology, with all contacts on
1982 is a spring chicken for an American nuclear power plant. Three Mile Island
and Fukushima are older, with the walls of lamps, switches and gauges.
On Sunday, March 10, 2019, 10:18:07 AM MDT, Jon Elson
On 03/09/2019 10:43 PM, Gregg Eshelman via Emc-users wrote
Three Mile Island's containment worked. Only a small amount of radioactive
steam got outside. What prolonged the incident was the location of an indicator
lamp. While the crew was clustered in one spot trying to figure out where all
the water they were pumping into the core was going, the light
When the often repaired servo amplifier power supplies at the Keck Telescope
needed replaced, rather than bodged yet again, Andrew decided to reverse
engineer them and build new ones using current components.
He's made all the documentation and files available for anyone who wants to
Here's a fellow in AU with a test of cheap vs expensive solar panels. Turns out
the $90 panel puts out significantly more amps than the $300 panel he
Some commenters note the cheap panel is using the newest thing in PV cells. No
Says it has a bad transformer and the RS232 port doesn't work, but for $500
could be a good CNC refit project, especially since the old Anilam Crusader
system was so terribly slow.
Any chips on the control panel, especially directly on the keyboard or one the
keyboard is connected to via a multi-wire cable? Somewhere in there may be a
matrix encoder and RS232C chip. If you have RS232C then it should be possible
to tap into that to feed character data into a modern control
LTO-6 drives can put 2.5TB uncompressed onto one tape and can be picked up at a
decent price since they're 2 generations behind the latest. LTO-7 puts 6TB
uncompressed onto a tape but used/surplus drives are still going for over
$1K.LTO-8 does 12TB uncompressed but you'll need to drop over $3K
Have the authors of those programs ever actually used a properly functioning
text editing program? Can xmlcopyeditor even open the files it saves?I have,
several times over the years, run into programs that could save in formats they
could not open, or would auto-corrupt files they'd just saved
Here's some info, but the full article is behind a subscribe wall. Might be
available from another source.
On Thursday, January 10, 2019, 3:42:51
How many sockets on that chain? Could it run the other direction? What about
modifying to be able to number the chain sockets so the tool locations can be
tracked? Could still have it so that if it finds an empty socket or wrong tool
number in a socket it would do a full pass on the chain to
I've seen some that have each tool holder coded and read the holders in the
chain or carousel as it moves. The system has no idea where any of the tools
are but it does know the difference between an empty spot and one with a tool.
So when a tool is requested it just runs the carousel or chain
An easier way to get the round corners in a D-Sub cutout is to use an endmill
with the radius of the corners then make the trapezoid with sharp corners.
Offset to the inside and let that and the tool size take care of the round
HP made a CRT monitor that had IR emitters and sensors aimed vertically and
horizontally. They had to be mounted pretty far forward to clear the curve of
the tube and resolution was very low. Software using it was limited to having
its active spots at the intersections of the emitter and sensor
PCIe to SPi 'demo board'.
drivers at the bottom of the page
On Saturday, October 27, 2018, 1:43:43 AM MDT, Gene Heskett
The spi port on the pi is faster, but I've not found an spi card for x86
Be careful with the DPSS type of green lasers. They can put out powerful
infrared along with the
On Monday, October 8, 2018, 8:48:20 AM MDT, Roland Jollivet
Has anyone here
:07, Gregg Eshelman via Emc-users (<
> You could make the vacuum table with several zones, connected with a PVC
> pipe manifold and ball valves to close off sections you're not using. That
> would be easier than keeping stuff around to
You could make the vacuum table with several zones, connected with a PVC pipe
manifold and ball valves to close off sections you're not using. That would be
easier than keeping stuff around to lay over unused sections of the table.
On Thursday, October 4, 2018, 3:41:58 PM MDT, Gregg Eshelman via Emc-users
Here's a way to drive the gantry with roller chains. Using fewer changes of
drive is always better since going from a shaft, to worm gear, to rack
Here's a way to drive the gantry with roller chains. Using fewer changes of
drive is always better since going from a shaft, to worm gear, to rack and
pinion has more places for backlash. The same mechanism as in this video can be
used with lengths of toothed belt.
Roller chain drive Plasma
The easiest method is mechanically connect the two sides with a shaft along
the gantry and use one motor. Then it *cannot rack* or have any of the other
issues that can happen with driving both sides of a constrained axis with two
If you need more Z height, you can elevate the racks on
The one I have was made by Avenger Products, model 21400. Uses G13A batteries.
The company appears to have been bought by Jewett-Cameron circa 2011 and this
particular product discontinued.
The V2 8 megapixel camera for Raspberry Pi uses the Sony IMX219 sensor which is
a bit over 5mm wide by a bit under 5mm tall. They call it 1/4" diagonal.
Should be able to hit that with a laser beam, if the pinhole lens can be
The first model Pi camera used the (since discontinued)
RealD 3D glasses are
How they workHow RealD 3D Works
| | |
How RealD 3D Works
Follow us at: RealD.com Twitter.com/RealD3D Facebook.com/RealD3D Instagram:
A circular polarizing filter, like from a pair of RealD 3D movie glasses, seems
to both dim and 'sharpen' a LASER beam somewhat. What it doesn't do is make the
beam split into a row of dots like a linear polarizing filter does.
Too bad they recorded the video with a potato. 240p, posted in 2013. YouTubing
like it's 2005!
On Monday, September 17, 2018, 9:25:39 AM MDT, Todd Zuercher
What would be impressive is when we can make Linuxcnc run a machine like this.
Or you could just find a straight spindle so you can get to machining with the
machine instead of spending time machining to try and fix the machine. ;)
On Wednesday, September 12, 2018, 6:16:06 PM MDT, Gene Heskett
When I was making the adaptation of
I have a LASER that is made to mount in a chuck or collet. It has alignment
screws and adjustable focus. Aim it at a wall far away and adjust the focus for
as small a dot as possible.
Make a target to mount on the carriage, chuck and center the body of the LASER
then use the alignment screws
Goldenfir SSDs test out to be as good as Micron's mid-range models, because
they use the same controller chip and memory chips as Micron's mid range, but
cost much less. Unlike how many companies publish absolute best case
performance for their storage, this guy's benchmarks are well above
Well that's certainly a failure in design / programming by the manufacturer.
I'd have it so that when re-enabling Z the first and only thing it would be
able to do is rehome Z up so it knows where Z is. Even if the manual says the
operator has to power cycle and rehome everything after using Z
An idea for putting a square hole at the end of a round one, without having to
use special tooling.
Mill brass bar stock into a pair of small L shapes, with one leg just as long
as the width of the tap shank.Position the two pieces to make a square hole
then silver solder together. Cut off
Rent space on the tower for cell phone and wireless internet antennas. That's
what the grain elevator across the street from me did, top of one building has
phone antennas all around it.
On Friday, May 11, 2018, 6:46:50 AM MDT, Erik Christiansen
Like these? Transmission Gear Kit | Steel Gear Kit - LittleMachineShop.com
| $54.95 | |
Transmission Gear Kit | Steel Gear Kit - LittleMachineShop.com
Never break expensive or hard-to-replace gears again! Once installed on your
mini mill, this kit replaces plasti...
Report that security hole to eBay. The site should check for an authorization
cookie etc and if not found,, don't load the site with your account logged in.
On Thursday, May 10, 2018, 6:16:17 PM MDT, Gene Heskett
On Thursday 10 May 2018 07:22:40 Gene
To use those with a TTS or other 3/4" R8 (or 4C) collet you'll need adapter
rings. Like these.
They used to have thinner ones that had to be glued on with epoxy. Looks like
they're going (or already have gone) to making only the
I'd expect most to get it trammed, tighten the bolts extra, and leave it alone.
Some companies doing Bridgeport or clone CNC builds made rigid rams without any
ability for the head to tilt or nod. A few went so far as to make even the head
custom, without any capability of having manual
and MC1650 are supposed to be PWM. Many people have successfully
used MC2100 controllers and treadmill motors on lathes, drill presses and other
On Monday, May 7, 2018, 11:44:09 PM MDT, Gene Heskett
On Monday 07 May 2018 22:56:15 Gregg Eshelman v
eBay links can be reduced to just this
On Monday, May 7, 2018, 10:50:51 AM MDT, Ken Strauss
One can delete all of the tracking garbage starting with the question mark:
The MC1650LS motor controller looks like a decent alternative to the MC2100.
It's newer and smaller yet is used with the same types of high volt DC brush
type exercise equipment motors. And prices are lower.
Problem is I can't find diddly on connection diagrams or what sort of extra
Some States are absolutely nuts on ground source heat pump regulations. In
Idaho there's no special regulations (AFAIK) on open loop ones. Take water in
(from a well or city supply) and dump it in the open, down a storm drain or
into a body of water, or put it down another well. Seems rife with
I've been trying to find a program or online converter that can take a
non-symmetric G-Code and mirror image it to cut the opposite shape while still
running around it clockwise. There is one for Windows that can split code in
half and rotate it so that with proper fixturing a mill can be used
Screw whip and bending can be mitigated by putting it under some tension, with
angular contact ball or tapered roller bearings at the ends.
On Sunday, February 18, 2018, 10:47:47 AM MST, Chris Albertson
If you are bending a screw the speed does not
Apply spinach to the X axis and there will be carnage?
On Wednesday, February 7, 2018, 12:51:16 PM MST, wrote:
Thanks Chris…for both the information and one of the most apropos example of
autocorrect I have ever seen.
"The spinach is turning in x-direction the carnage
What I can't find on those Harmonic Drive brand harmonic drives is one single
useful bit of information on how big or small they are. All I've been able to
find are motor size numbers, that appear to be something proprietary, they're
not listed as NEMA or any other standard, just plain numbers.
othing to the cost of the drive.
On 02/01/18 23:35, Gregg Eshelman via Emc-users wrote:
> I run the VFD (that's never varied) on my old Monarch lathe without using
> braking. It has terminals to connect a braking resistor but for this machine
> there's no need.
> What I find c
The one I have on my old Monarch lathe, to start in higher speed gears I have
to slip the clutch a bit or it'll quit with an overcurrent fault. In lower
gears I can just pull the lever.
There may be some programmable adjustment that can fix that, but it works as
it's setup now. One crazy thing
I run the VFD (that's never varied) on my old Monarch lathe without using
braking. It has terminals to connect a braking resistor but for this machine
there's no need.
What I find crazy is that a simple, single function device that only converts
single phase to three phase, without all the
Or just get a proper single phase to three phase VFD and do the job right. For
under $200 you can get a 230V 1PH in drive that'll run up to a 3HP 3PH
On Monday, January 1, 2018, 10:49:12 AM MST, John Figie
Internal gears can be rotary broached. It uses a tool similar to what's on that
shaper but both tool and gear blank are rotating pretty quick. Takes just one
pass. Splines can be cut the same way.
On Friday, December 15, 2017, 4:19:44 AM MST, andy pugh
What's the model of Cadillac? If it's rear wheel drive the gears are readily
available from places like bowtieoverdrives.com
Advance Auto Parts shows speedo drive and driven gears for front drive GM cars.
Would be an interesting project to try, but the part should be available off
Basics first. Disconnect power, unplug and re-connect all plugs, loosen and
tighten all screw terminals. Re-test. Eliminates any minor corrosion or
possible looseness causing an intermittent.
On Wednesday, November 1, 2017, 5:47:05 PM MDT, Eric H. Johnson
Looks like a nice refit project for not a bad price. If this MagnaTurn 1218
wasn't on the other side of the continent...
South Bend MagnaTurn 1218 CNC Lathe 8 position turret PC/CNC control .15HP |
| $2500.00 | |
South Bend MagnaTurn 1218 CNC Lathe 8 position
SSD's, SD-Card, Compact Flash and most other solid state, writable storage has
built in wear leveling. Why SSD's need the TRIM done is because when data is
deleted it's only marked as deleted but isn't immediately marked as being
available to be written over, unlike disk drives where a file
I always thought SATA was a silly idea. Change from a parallel interface that
handles a whole byte at a time (or two or four bytes for various SCSI types) to
an interface that handles one bit at a time, requiring buffers to split up and
assemble bytes to pass onto the rest of the computer that
Is the motherboard AGP 8x compatible? There can be issues plugging an 8x video
card into a board with a slower slot. The AGP standard has provisions for
backward compatibility but they were for the most part optional. Many 8x cards
are 1.5 volt only, though some can tolerate 3.3V or 5V. IIRC
Has to be two different computers, right?
For PCIe x1, grab a Quadro NVS 290 off eBay, preferably with the dual monitor
breakout cable it'll require. Those come in dual VGA, dual DVI or one of each.
You'll also find plenty of ATi FireMV 2250 x1 cards but the Quadro beats the
pants off it and
Apple doesn't like JAVA. Apple doesn't like Flash. Whatever Apple says is old
news, the rest of the computer industry is quick to marginalize or stop
developing completely.Apple said "Flash is bad, mmmkay?" and Adobe just about
instantly stopped updating Flash player for Android. No reason
One of the newer thin clients should be able to run LCNC very nicely. I finally
got my Light Machines mill shifted out to where I can get at it to work with
it. Just need to get unbusy with other things so I can see about putting DOS on
a WYSE S30 to run its old software. It'll work with
I've been looking for something simple to make a remote control app for the
Toshiba TLP-7xx series digital projectors. They have an RS232C port and the
commands are mostly plain text, except for whatever STX (02h) and ETH (03h)
are. I assume that's shorthand for Start and End transmission and
Earlier this year I downloaded the latest release of Ubuntu and installed it on
an old laptop. I wanted to change the time/date display. Does it have a dialog
box where one can simply... change the time and date format? No. You have
to search online or ask on a forum for the 'secret code'
Look up the Dollo 3D printer. All the files are free to download. It
includes pieces of herringbone rack and matching gears. Could have some
examples printed then make molds and cast in high strength resin. Could
also use the 3D files to 3D mill steel racks and gears.
-- Original Message
You could simply connect it in series with the e-stop circuit.
-- Original Message --
From: "Tomaz T."
Sent: 7/29/2017 10:10:31 AM
Subject: [Emc-users] How to add additional condition for
-- Original Message --
From: "Chris Albertson"
To: "Enhanced Machine Controller (EMC)"
Sent: 7/28/2017 3:14:56 PM
Subject: Re: [Emc-users] [7x12minilathe] CNCZEUS is now Open source
Yes, still if you run Linux in single
Are there any free BASICs for DOS that include their own runtime
compiler and can use assembly language routines?
Porting BASIC programs to other versions, even to completely different
platforms, isn't too difficult if the screen output is text and the
program doesn't rely on some strange or
On Thursday, July 20, 2017, 7:24:37 AM MDT, Gene Heskett
On Thursday 20 July 2017 03:41:17 Chris Albertson wrote:
> Try h, j, k, l keys if the arrow keys don't work. VI was created
> LONG ago back when arrow keys were a luxury item. The old "hjkl"
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