https://www.britannica.com/science/spiral-mathematics
Several options here, take your pick.
Should be trivial to move it from floating pt to fixed.
May have to scale to make it happy. ;-)
Dave
> On Apr 10, 2024, at 12:09 AM, gene heskett wrote:
>
> On 4/10/24 01:57, John Dammeyer wrote:
>>
I have a very good Cat40 bolt to bench for installing tools but it is a nasty
job to bolt the cat40 back into the spindle.
If I could get access I’d pull the whole mess and replace (ideally). The stack
is 105 washers so not too expensive. I’ll climb up on top and take another good
look down
Considering how much of the Ru munitions have western chips proves how much of
the world is willing to cheat for a buck.
> On Mar 18, 2024, at 7:33 PM, gene heskett wrote:
>
> On 3/18/24 18:50, Jon Elson wrote:
>> On 3/18/24 07:53, Todd Zuercher via Emc-users wrote:
>>> Gene,
>>>
>>> In all
that is moving a
lot of material in my case 8620 or 20 carbon steel, not too challenging.
> On Mar 18, 2024, at 5:26 PM, andy pugh wrote:
>
> On Mon, 18 Mar 2024 at 21:13, Dave Engvall wrote:
>
>> So I’ve built Tee-nuts that will retain the cat40 assuming the
>> M6 shcs hol
On my Muzak the belleville stack is too far gone to retain tools. Access is
from the top which means removing the spindle motor, and transmission a
nontrivial task. A couple of years earlier model everything came out the bottom
and would have been a much easier job. So I’ve built Tee-nuts that
> On Feb 5, 2024, at 6:19 PM, gene heskett wrote:
>
> On 2/5/24 18:26, John Dammeyer wrote:
>> Thanks everyone. On the Unimat list there were a number of people really
>> pushing the idea that Z+ was towards the chuck and it just didn't make
>> sense. And as we all know, nowadays once can
Stockgears.com makes plastic gears. However, they seem expensive to me.
Been years since I’ve seen a price list.
Dave
Ps. Had to pull out a small cutting board they made as advertising to remember
the name. ;-)
> On Mar 4, 2024, at 9:30 AM, andy pugh wrote:
>
> On Mon, 4 Mar 2024 at
Just cheat a bit. If you are belt driven then put a small idler/tensioner
pulley arranged to be driven by the main belt.
On the Mazak the servo motors had resolvers built in: with a 1:7 gear to
increase the resolution .
> On Jan 4, 2024, at 7:14 AM, Sam Sokolik wrote:
>
> We had gotten some
Hi all,
I've pretty much finished the mechanical side of a add-on Y axis for my
small mill. New axis is 25 mm rails, 2 nm stepper-servos and glass
scales as quality control only.
I have a Dell 790 with Debian 9 RT with Buster uspace. Hardware is 5i25
and single 7i76. Boots and comes up in sim
HI all,
I've been occupied in building a new Y axis to go on top the x of my
contourmaster. Nothing like jousting with windmills.
1" rails on top of a cold drawn/hot roll frame. 5/8" ballscrew. With
the spindle as reference I get about a half thou deflection leaning on
the axis in the y
Different strokes for different people.
Tormach supplies a niche market and is surviving. :-)
I went the other way and bought a machine with a dead control at
auction. Trucked it in, shoved it thru the door of my shop and then
spent the next year getting it running, New servo amps, servo-to-go
I did something similar on a BP sized mill. Manually move x and y to
roughly center the beam of a laser diode in a 3 mm hole in a tab at one
end of the mill. Kick off homing for x and y and it will pick up the
first index on each axis. You can then move from there to where your
preferred zero
With an open machine I tend to us air rf vacuum to extract chips. One
needs enough air movement to get turbulence for effective chip removal.
I tend to start pockets, etc with a drill to within .02 of full depth.
I've also drilled a pattern of holes to extract major volumes of
material from
This make a good case for dual independent encoders. motor
shaft/ballscrew, ballscrew/glass scale, steps/glass scale, etc.
Just for grins I tried the hand crank on my well used (Boeing then trade
school, the auction) defunct tracer mill converter by a Russian engineer
to cnc for the trade
On 9/24/22 11:18 AM, gene heskett wrote:
On 9/24/22 11:34, Jon Elson wrote:
On 9/23/22 17:24, gene heskett wrote:
Each brand of vfd seems to have its own setup. But that lf boost is
a tricky one. I don't know
if that invertor shows you the amperage being delivered but it seems
it would be
This may be a bit wild but use pll and trigger when the expected pulse
doesn't appear. Maybe a bit far out of the box.
Basically the reverse of synchronous detection.
D
On 9/18/22 1:59 PM, Sam Sokolik wrote:
in case that screenshot didn't come through
with an angle.
For the first pass tool engagement will always be 100% so maybe start
in the middle spiraling outwards is a good choice to keep tool
engagement at the desired value is a good choice?
Den 2022-09-18 kl. 18:57, skrev dave engvall:
Hi Nicklas,
Just a WAG, offset cutter maybe .25 mm from real
Hi Nicklas,
Just a WAG, offset cutter maybe .25 mm from real corner and plunge then
clean up in incrementally with a couple of passes to clean out the
wings. I think most cam programs just take light passes including the
finish pass.
How stiff the spindle is and sharpness of the cutter are
One has to remember that emc was written not as a machine controller but
to demonstrate
the concept of communication between machines. In like manner steppers
were an add-on.
Linuxcnc is only alive today because of a critical mass of dedicated
volunteer programmers.
Dave
On 7/21/22 2:32 AM,
Indeed! Poly-Vee belts are acceptably quiet but of course then you need
to rig an encoder.
Probably a decent trade off. Available, not too expensive, transfer
power well and seem to last.
Years ago I made both of my pulleys.
Dave
On 7/4/22 10:05 AM, andy pugh wrote:
On Mon, 4 Jul 2022 at
solution.
Note: Epoxy can always be removed with heat or chlorinated solvents but...
Dave
On 6/27/22 6:27 AM, dave engvall wrote:
Back again;
Since crawling in under the spindle is difficult for an old stiff guy
I laid the iphone on the table and took a pic, rotated the spindle 45
degrees and took
Update: The drive lugs get in the way of a safety disk or ring or
anything else. Epoxy looks more promising; just a semi-permanent solution.
Note: Epoxy can always be removed with heat or chlorinated solvents but...
Dave
On 6/27/22 6:27 AM, dave engvall wrote:
Back again;
Since crawling
the radiator cap
and run a new(er) one in. Still that brings all sorts of problems of its
own. Hard to win.
Back to the drawing table. ;-)
Dave
On 6/26/22 9:10 AM, andy pugh wrote:
On Sun, 26 Jun 2022 at 15:45, dave engvall wrote:
A couple of solutions present themselves but neither are ideal
and totally
supervise/instruct him what to do?
On Sun, 26 Jun 2022 at 16:45, dave engvall wrote:
Hi,
My Mazak V5 has been down for a few years. First for brushes on the
spindle motor and then a much more serious broken belleville stack.
Unfortunately, the spindle on this model comes out from
Hi,
My Mazak V5 has been down for a few years. First for brushes on the
spindle motor and then a much more serious broken belleville stack.
Unfortunately, the spindle on this model comes out from the top which
means pulling all the hydraulics and the spindle motor/transmission and
getting
1=1.56
On Mon, 23 May 2022 at 19:58, Rob C wrote:
Is this the green connector plug?
On Mon, 23 May 2022 at 18:57, andy pugh wrote:
On Mon, 23 May 2022 at 18:41, dave engvall
wrote:
Can anyone provide a part number, eg. manufacturer or digikey, etc
number for the 6 pin encoder cable con
Hi all,
Can anyone provide a part number, eg. manufacturer or digikey, etc
number for the 6 pin encoder cable connector on the LCDA357H controller.
It should be identical to the cable end for the 6 pin connector for
pul+, plu-, etc.
As always I appreciate the help. As I age I seem to need
Indeed! Positional is critcal and useful.
D
On 5/12/22 2:07 PM, Gregg Eshelman via Emc-users wrote:
Go traffic lights in Japan used to be blue. There may still be some blue ones
in out of the way places. When the country adopted the international color
standard for traffic light colors,
I like the idea of a web cam, much better than single chips. Even better
if one can split out the RGB channels, in which case you get built-in
filters. Still concerned about getting enuf contrast off a thin film of
marker pen; fluorescence? Glad it is someone else's problem.
Dave
On
Indeed, it is an interesting approach.
http://www.shumatech.com/support/chinese_scales.htm#Scale%20Connector
It may be time to dig out the scope or to upgrade to newer scales and
readout.
If the glass scale is very good then it is probably worth the fuss ...
else
The chinese scales I got
Being used to servos the first thing I test is the estop. Saves damage
to expensive mechanics.
Once I was testing a new interface. Running it from lower left to upper
right. It was gaining about .1" every pass. ... after about 4 passes it
took off for the upper corner at full speed: 400 ipm. My
Being a suspicious kind of guy I'd hang an encoder on the shaft and
measure it.
Jon Elson makes an interface that passes thru the encoder counts on a
panasonic servo motor with your electronics background you ought to be
able to do the same for your servo.
Just thinking out loud which usually
Clearly OT!
Indeed electronics have come a long ways since then.
I still have my Dad's 200 w-sec strobe. Oil filled caps from Edmund
Salvage dumped to the flash tube with a thrytron. Later vintage an
electronic ignition, nice toroid 6 v to 400 v converter and a decent SCR
for my PV544
Hi all,
I have a pair of ball screws: THK KX 71227 A
These are new but older and as far as I can tell not on the THK site.
They are threaded on one end to retain a bearing.
M15 x 0.8 or close. Does anyone know of a bearing nut that would fit or
am I stuck with
having a pair custom made?
I've
Works fine here. If someone had not commented I'd wouldn't of had a clue.
Dave
On 3/31/22 12:54 PM, Martin Dobbins wrote:
Perfect, thanks!
Martin
From: Lawrence Glaister
very strange... working fine here. maybe try the http version...
using firefox 98.0.2
At high rpm a resolver may make more sense ... and more $$. Depends. ??
Dave
On 3/27/22 2:03 PM, ken.stra...@gmail.com wrote:
Gene, do you have a part number for your high RPM Omron encoder? Maybe I can
snag one...
-Original Message-
From: gene heskett
Sent: March 27, 2022 4:49 PM
It is my understanding that ball screws are case hardened so grind to
get under the case and
then things get easy.
Interesting and good job on the ball nut. !!
In line with the nebel prize: the machine should be a very light grey
and your hand should pass thru it easily. ;-) Nebel = fog.
A while back I swapped out my accurite glass scales on x and y (manual
mill) for 5 um Chinese ones because my DRO was going bad. The accurite
ones are better but were not compatible with a Chinese DRO. Still very
good to passable without adding the builtin comp. Fixes the problem of
counting
Those 'smart sockets' can be really handy. I use one to control the
startup of my 3 phase rotary converter. That way I can be in the shop
and only have the converter running when I need 3 phase. In the house is
a manual lockout switch for times when I know I won't need 3 phase.
Dave
On
I typically have gone to West Marine for epoxy. 5:1 mix ratio with
metered pumps. Good idea about avoiding the glass expander/thickener
micro bubbles. :-) Fast, med and slow catalyst available.
Dave
On 2/14/22 2:10 AM, Gregg Eshelman via Emc-users wrote:
Modern epoxies like the ones sold by
doubt that Gene has
18-inches of Z-clearance on his small mill to thread the length of his desired
screw plus spindle clearance to mill to the table might be an issue.
-Original Message-
From: dave engvall
Sent: February 13, 2022 1:20 PM
To: emc-users@lists.sourceforge.net
Subject: Re
Other options for buttress. DIN | ANSI .. Either grind a tool out of M2
or equivalent or go shopping for inserts on the web surplus sites. They
won't be cheap but a bit less hassle.
Single point thread mill??
Lathe sound easier than milling it.
Dave
On 2/13/22 9:37 AM, ken.stra...@gmail.com
but that does not solve some conditions. Can't win
them all.
Dave
On 2/9/22 4:17 PM, andy pugh wrote:
On Wed, 9 Feb 2022 at 19:30, dave engvall wrote:
Hi,
It would appear that the 'easy' way to compare the two methods would be
to use sim or usrspace. That would get it plotted but I doubt
Hi,
It would appear that the 'easy' way to compare the two methods would be
to use sim or usrspace. That would get it plotted but I doubt the
differences, unless gross, would be easily detectable on a plot. I've
forgotten, if indeed I ever knew how to list output from something that
Hi,
I've read the assertion many times that ijk is better than radius and
always assumed it to be correct; but by how much.
Few of us run machines and are 'new' tigjht ;-) Maybe I've not looked
in the right place(s)
for an analysis or for demonstrated interp of circles with some kind of
error
Hi,
I seem to remember a crank as in crankshaft lashup to drive the table.
Personally I think the hydraulic setup is better but harder to achieve.
The free lunch is hard to find.
Dave
On 2/4/22 9:11 AM, John Dammeyer wrote:
From: Kenneth Lerman [mailto:ler...@se-ltd.com]
The longitudinal
Yep! Brain dead, missed those.
Dave
On 2/3/22 8:33 AM, andy pugh wrote:
On Thu, 3 Feb 2022 at 15:28, dave engvall wrote:
At first glance it looks pretty good but lacks pci slots unless my eyes
have fully given out.
Ditto on disk interface.
Assuming you mean https://www.onlogic.com/pd14ri
Greetings:
At first glance it looks pretty good but lacks pci slots unless my eyes
have fully given out.
Ditto on disk interface. So unless the pport has a good EPP and
therefore useful for 7i43 | USC | ppmc it is not a good deal. Just my
tuppence.
Dave
On 2/2/22 10:43 PM, Chris Albertson
My thinking is that the 7i43 is best used for rt tasks with an EPP port,
hence the problem. I should have been more explicit. The plan is mb ->
7i43 -> 7i42 for stepper-servos.
Dave
On 1/28/22 11:17 AM, Chris Albertson wrote:
On Fri, Jan 28, 2022 at 10:18 AM dave engvall wrote:
h
hi,
I'm looking for users that are actually using a motherboard with a 7i43
and can recommend candidate boards from experience. Thanks in advance.
Dave
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On 1/27/22 1:47 AM, andy pugh wrote:
On Thu, 27 Jan 2022 at 04:49, Ralph Stirling
wrote:
I got to wondering if it
would be possible to make a miniature taper lock
type bushing and pulley to clamp onto a stepper
shaft. Anybody ever seen anything like that?
I have designed and used a few
I assume everyone knows about these.
https://www.fennerdrives.com/trantorque/
Not cheap but tend to work.
Dave
On 1/26/22 8:30 PM, Ralph Stirling wrote:
I had some problems today with a small XL timing
pulley slipping on a NEMA17 stepper shaft due to
the set screw loosening after running for
Known good part obscures the problem of shrinkage unless you want them
to take your known good and scale it for shrinkage which they will do at
$$/hr. ;-)
Working from their shrink % will allow you to do the sizing and that
make it simple for them.
A foundry 100 mi or so from me and out in the
Cu inhibits algae and should do a decent job on most bacteria. So a bit
of Cu sulfate.
Zn chloride and or ferrous chloride inhibits moss but the ferrous
oxidizes to ferric and stains
siding/concrete so use the chloride. In a pinch just use a bit of
Clorox; even peroxide should do the job.
If
Hi,
I ran across an article by one of the servo drive firms that said the
using two sensors/axis improved motion. I think they used a resolver on
the drive and an encoder on the ball screw. While this improves motion
that assumes you have very good ball screws. I think that a better
approach
I'd be lost w/o a command line editor. vi may be vile but vim can be
surprising useful. My feeble brain still can't get configurations that
work with a gui type configure. I'll gladly take a framework and
modifiy it to suit my needs. Wish list: smoother motion probably via
sine wave,
I must say John that you are much more patient than I. As long as the
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
Soaking the plaster of paris encased part in sodium bicarb in water
should dissolve the POP. Use as much bicarb as the weight of the plaster
of paris. I've not tried this so YMMV. ;-)
Dave
On 12/21/21 1:34 AM, Gregg Eshelman via Emc-users wrote:
One method of strengthening 3D printed
Apparently standard grade collets are grade A , AA collets are
concentric to 5 um.
https://www.parlec.com/Products/Tool-Holding/ER-Collet-Chucks/Collets/5-Micron-(AA)/Inch-(1)
Dave
On 12/7/21 4:16 PM, John Dammeyer wrote:
Does anyone know the difference between the non AA and AA collets?
On 11/21/21 9:24 PM, John Dammeyer wrote:
I'm running my AC Servo spindle motor as step/dir and can easily tell LCNC to
do 1 RPM. I also have the quadrature encoder on it so I can do power tapping.
The drive is through the MESA 7i92H as one of the stepper channels as is the
encoder
In converting my Mazak I just tied a toggle switch to the control line
for the valve that ran the hydraulics for tool release. One hand on the
switch and one on the tool. Rather crude but it worked until the
belleville stack broke.
Dave
On 11/14/21 4:02 AM, Roland Jollivet wrote:
On a BT30
Is anyone using ethernet as a link between linuxcnc and a 7i90?
Comments and/help appreciated
Dave
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For the fussy or perfectionist water cool. Probably water cool the
ballscrew as heat conduction will be far superior to trying to cool the
acetal nut.
Yep! I just fell out of the trees and damaged my head. ;-)
Dave
On 11/4/21 2:46 PM, andy pugh wrote:
On Thu, 4 Nov 2021 at 21:34, John
The aquaium pump should keep the sump aerobic. I suppose adding a bit of
peroxide from time to time would do the same thing. If you let the sump
go reducing (anaerobic) then the beastie that grow make volatile fatty
acids and other wonderful smelling ( :-( ) by-products.
I live in a high
Hi Andy,
I have a box of those connectors in a 6 wide and will get a box of 1
wide and two wide.
My thoughts are when used outside in a marine environment to glop some
3M Scotchcoat on them. Of course that make them rather fixed but they
are cheap. :-)
Dave
On 11/4/21 1:44 AM, andy pugh
I use 1/16" grinding discs all the time for such. I think I'd arrange to
clamp the shaft not the motor frame so as to
reduce vibration on the bearings. It it amazing what those discs will do
at reasonable speeds.
Dave
On 10/17/21 10:27 PM, andrew beck wrote:
Quick and easy way is to use a
Being lazy and cheap I would clamp the piece broken handle side up to a
plate using a pin thru the hole as a second reference for holding, If
necessary use a screw thru the hole depending on size. Now that you
have it affixed, probe profile and convert to dwg/cad. Machine off the
casting on
Hi,
Fully recognizing that nothing is impossible to the person that doesn't
have to make it work. With that proviso I will open
mouth and insert foot. To wit: a sine for acceleration should give a
more gentle startup and approach to end point. Of course implementation
is left as an exercise
Hi all,
To the best of my knowledge any version of the lcnc pid is in software.
OTOH mesa does offer SOFTDMC which does run in/on mesa fpga products.
However, that breaks the core concept of multiple vendors and real ease
of user modification of the software although there are a few in this
IIRC emc was conceived as a vehicle to test intercommunication between
processes and as such higher level features such as lookahead,
smoothing, etc were not part of the master plan. In fact emc would not
have had stepping if Matt Shaver had not requested it.
Now on to the real subject of
read all the way to the bottom for the humor.
https://www.linearmotiontips.com/how-to-reduce-jerk-in-linear-motion-systems/
Dave
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Hi all,
Everyone has their own favorite way of workholding. Without good work
holding nothing good follows. Thin angle stock I clamp in the vise with
a rectangular block as suggested below. However, my most common approach
is to bolt it down usually with 1/4" shcs, which implies gr 8. If I
HI John,
If I'm reading correctly it is OK with conventional milling but off
with climb. Too weird! I guess the next step would be to mill it
conventional and overlay with climb and see what happens. Maybe a bit
of layout dye between runs.
The alternative would seem to be that Murphy and
Weird! Is it repeatable? Did the program use R or I,J? Just fishing? ;-)
Dave
On 8/1/21 7:25 PM, John Dammeyer wrote:
The milling operation was set up to always be climb milling. Zero point for the
center hole and the outside perimeter was the same. And yet it milled more
away on the LH
Although electrical inspectors tend to be a power unto themselves they
still have to follow the rules. i.e. WAC's and local and national
electrical codes. Be as gentle as possible they tend to be prickly.
Being WW they no doubt see a bunch of EU stuff for wineries. Clearly the
machine didn't
"The solution is to either add more counts per revolution or use a ten
timesmore complex control algorithm."
IIUC then the real problem here is statistical. That is the sample size is too
small to be significant. Maybe an over-simplification of the issue but:
I think there are a couple of
"The solution is to either add more counts per revolution or use a ten
timesmore complex control algorithm."
IIUC then the real problem here is statistical. That is the sample size is too
small to be significant. Maybe an over-simplification of the issue but:
I think there are a couple of
https://math.stackexchange.com/questions/213658/get-the-equation-of-a-circle-when-given-3-points
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Hi,
Alternators like to be spun fast. Max rpm 10K but 6Krpm is a good place
to operate. It is easy to damage pb-acid batteries while charging.
See
https://www.solar-electric.com/lib/wind-sun/Iota-charging-deep-cycle-batteries.pdf
There are better guides on the web but this is the first one
From my view as a 'older' person: the CoC simply weaponizes those who
want to be nasty.
I visit another forum where about half the members are polite and the
other half apparently didn't get much parenting . profane,
aggressive, nasty, lacking basic spelling and language skills, etc.
https://www.globalspec.com/FeaturedProducts/Detail?ExhibitID=325495=%2D1103937792=d47436=210629=d253f6=Vol21Issue26=1=2070084=link%5F2070084=367418=95281=newsletter=nl=414029
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On the Z for my Cinci I cheat by running the encoder off a small idler
driven by the belt between the servo and the ball screw. Gets me about
5X number of counts. In more practical terms ~100K count/in. Encoders
off the end of the ball screws are 40K/in.
I pretty much standardize on Koyo 2500
It is not unusual for shaft mounted encoders to have some strain relief
rather than a hard connection. see link.
file:///tmp/mozilla_dave0/MTN-696TBC-1.pdf
On 5/24/21 7:12 AM, Andrew wrote:
пн, 24 трав. 2021 о 13:41 andrew beck пише:
I don't think it has any USB connectors.
I do know that the io controls all go through the plugs on the bottom. One
for encoder feedback from motor.
One for the input
Talk about having a bad day. Sure glad the extras were just a recipe and
not something private. :-)
Dave
ps. clear down at the bottom of the post is the 'real post' about homing
with a glass scale.
You can delete 90% of it and won't miss a thing.
On 5/22/21 8:09 AM, dave engvall wrote
Instructions
*
Rinse and pat the shrimp dry, then transfer to a large mixing bowl.
Drizzle with 1/2 tablespoon olive oil and sprinkle with the chili
powder, chipotle chili, cumin, and salt. Toss to coat evenly. Let
rest while you prepare the shrimp taco sauce and slaw.
*
Hi all,
Just as a matter of interest I thought I'd throw this out there.
A while ago I messed up one of my acu-rite glass scales ( boo-hoo!)
It goes off for repair and I mounted a Chinese glass scale as a temp
replacement.
This is mounted on the X of my Cinci contoumaster. Year of manufacture
Hi all,
I'm trying to use a 7i43 I've had on the shelf for awhile.
200K version despite the error message. :-)
I've tried it on several motherboards and several paraport cards with
pretty much the same result.
Hopefully someone can give me a hint of what is really wrong.
Below is the message
So if I have a raspian os running that will run linuxcnc ??? an arm
version that is.
...and I've gone thru a whole lot of angst for nothing?
Dave
On 4/7/21 9:02 AM, Gene Heskett wrote:
On Wednesday 07 April 2021 01:24:35 dave engvall wrote:
You can use dd, on an x86 box to write the u
nos with uspace(?) will do that I'm happy. I just need
something to WORK. ;-)
With some pain I can use my wife's Mac and the rpi-tools to get an
image on to the SD.
Wandering in the wilderness.
Dave
On 4/7/21 7:31 AM, andy pugh wrote:
On Wed, 7 Apr 2021 at 15:25, dave engvall wrote:
Image is
Image is one at top of page. buster 4 G
https://raspi.debian.net/tested-images/
I'm doing everything on a I7 with Ubuntu 16.04.1 then write to 32G SD
an take that to the pi.
Dave
On 4/7/21 12:49 AM, andy pugh wrote:
On Wed, 7 Apr 2021 at 06:28, dave engvall wrote:
attempt to install
On 4/6/21 10:24 PM, dave engvall wrote:
OK, so I download 20210210_raspi_4_buster.img.xz
check sha256 and it matches
make a *.img out of it.
attempt to install the rpi-imager no x86 version. so use dd
dd to SD: dd bs = 1M if=202010210-raspi_4.buster.img
of=/media/dave/3339-3839
OK, so I download 20210210_raspi_4_buster.img.xz
check sha256 and it matches
make a *.img out of it.
attempt to install the rpi-imager no x86 version. so use dd
dd to SD: dd bs = 1M if=202010210-raspi_4.buster.img
of=/media/dave/3339-3839/rpi_4_buster
unmount
put SD in rpi4B and power
Hi,
After much fuss due to a bad assumption I made I finally managed to
flash the 7i90 for spi. Easy when you do it right.
However, loading an OS isn't going well:
Download a buster image as a .zip. Unpack to get an .img.
dd .img to 32G SD, stick in slot and power up.
I get 4 blinks ( no elf )
My Mazak V5 had a coarse helix cam which oriented the spindle. The one
at Galesburg used something closer to an inductive sensor to sense
index.. I think that got swapped out for an encoder. Once it picked up
the index it then rotated n counts to index the spindle for tool
change. If memory
I suspect Belarus.
On 3/14/21 10:09 AM, Gene Heskett wrote:
On Sunday 14 March 2021 06:34:04 andy pugh wrote:
On Sun, 14 Mar 2021 at 10:07, Gene Heskett
wrote:
https://vers.by/en/touch-probes/9-vers-pr.html
What is this in USD?
It says "355.00 BYN~ 10050 RUB, 136 USD, 113 EUR"
I rather hate to think of the cost ... beautiful stuff ... German made.
It is easy to make a probe; good software to extract the real value of
the probe, not so easy.
Dave
On 3/12/21 9:14 AM, Ralph Stirling wrote:
This would be an awesome setup for Linuxcnc.
Hi all,
I'm trying to get an Rpi4b -> 7i90 going.
Ralph Stirling made an interface board for the pi that allows one to
flash the spi.
The following is copy of the procedure:
On Rpi:
$ git clone git://git.code.sf.net/p/openocd/code openocd
$ cd openocd
$ ./bootstrap
$ ./configure
The few times I've had different counts re' direction it has been a
broken flex coupling to the encoder.
Of course it could be that you are simply running out of frequency
response. Not likely but possible.
Dave
On 3/7/21 12:54 PM, Gene Heskett wrote:
On Sunday 07 March 2021 14:07:33 Feral
https://www.toolots.com/quality-ezcad-jpt-30w-fiber-laser-engraver-marking-machine-for-metal.html?cid=10310162125=EAIaIQobChMIkY-kjNaU7wIVEz2tBh35iAhYEAQYBCABEgJiv_D_BwE
Others seem to use more power; like 80 to 100 w but not necessarily FO.
Dave
On 3/3/21 9:34 AM, Curtis Dutton wrote:
I have
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