Just a thought:
Since the index pulse is only one PPR, does it keep working and is it readable
right up to 10k rpm? If so, you could first read the index pulse; if speed>
threshold, multiply index by encoder ppr and connect that to encoder in; if
speed < threshold (-hysteresis?), connect
On Friday 19 June 2020 23:39:45 Jon Elson wrote:
> On 06/19/2020 10:03 PM, Ken Strauss wrote:
> > Obviously I'm not contemplating threading at 10K RPM! However, I'd
> > like to leave the encoder installed at all times which is why I'm
> > concerning about it surviving at high RPM. Suggestion for
On Friday 19 June 2020 23:03:36 Ken Strauss wrote:
> > -Original Message-
> > From: Jon Elson [mailto:el...@pico-systems.com]
> > Sent: Friday, June 19, 2020 10:43 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Universal spindle speed control for $7
> >
> > On
On Friday 19 June 2020 19:16:45 andy pugh wrote:
> On Fri, 19 Jun 2020 at 23:47, Gene Heskett
wrote:
> > Cura sees it at /dev/usb2, can octopi use that?
>
> You could ask on the Octoprint IRC. (freenode, same as LinuxCNC,
> #octoprint
nobody there, you show but but no greeting. left
On 06/19/2020 10:30 PM, andy pugh wrote:
On Sat, 20 Jun 2020 at 04:05, Ken Strauss wrote:
Obviously I'm not contemplating threading at 10K RPM! However, I'd like to
leave the encoder installed at all times which is why I'm concerning about
it surviving at high RPM.
My guess would be that it
On 06/19/2020 10:03 PM, Ken Strauss wrote:
Obviously I'm not contemplating threading at 10K RPM! However, I'd like to
leave the encoder installed at all times which is why I'm concerning about
it surviving at high RPM. Suggestion for a cheap gear tooth sensor?
I have a little article on my
On Sat, 20 Jun 2020 at 04:05, Ken Strauss wrote:
> Obviously I'm not contemplating threading at 10K RPM! However, I'd like to
> leave the encoder installed at all times which is why I'm concerning about
> it surviving at high RPM.
My guess would be that it won't explode, it will just stop
> -Original Message-
> From: Jon Elson [mailto:el...@pico-systems.com]
> Sent: Friday, June 19, 2020 10:43 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Universal spindle speed control for $7
>
> On 06/19/2020 07:03 PM, andy pugh wrote:
> > On Sat, 20 Jun 2020 at
On 06/19/2020 07:03 PM, andy pugh wrote:
On Sat, 20 Jun 2020 at 00:38, Ken Strauss wrote:
Good point regarding the need for an index. Are there cheap encoders capable
of higher RPM?
It will cost you less than $10 to find what happens to those encoders
at 10k rpm.
(My guess would be that they
On Sat, 20 Jun 2020 at 00:38, Ken Strauss wrote:
>
> Good point regarding the need for an index. Are there cheap encoders capable
> of higher RPM?
It will cost you less than $10 to find what happens to those encoders
at 10k rpm.
(My guess would be that they just stop seeing the edges)
--
atp
Good point regarding the need for an index. Are there cheap encoders capable
of higher RPM?
> -Original Message-
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> Sent: Friday, June 19, 2020 5:00 PM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Universal spindle
On Fri, 19 Jun 2020 at 23:47, Gene Heskett wrote:
> Cura sees it at /dev/usb2, can octopi use that?
You could ask on the Octoprint IRC. (freenode, same as LinuxCNC, #octoprint
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical
On Friday 19 June 2020 18:04:38 andy pugh wrote:
> On Fri, 19 Jun 2020 at 22:57, Gene Heskett
wrote:
> > Next? Is there a tut someplace that I missed?
>
> Octoprint runs headless normally. Have a look for a web page in your
> network at octopi.local (if you installed it on a Pi)
>
No net
On Fri, 19 Jun 2020 at 21:01, Jon Elson wrote:
> Nope, 2 phase means A and B only, no index pulse. Look for
> one with 3 channels, A B and Z (index).
It sounds like it is his intention to gear it down anyway, so could
not use the index even if there were one.
A mill only really needs an index
On Fri, 19 Jun 2020 at 22:57, Gene Heskett wrote:
> Next? Is there a tut someplace that I missed?
Octoprint runs headless normally. Have a look for a web page in your
network at octopi.local (if you installed it on a Pi)
I am running in on an old Pi2. I just put octoprint on the SD card and
On Friday 19 June 2020 16:18:24 Chris Albertson wrote:
> OctoPrint runs on normal PC. It is open-source and written in Python.
> Assuming you have a spare PC it's free to use.
>
> Yes, they sell plug-and-go kits and also have SD card images for the
> Pi4. Many people need this because they could
On Friday 19 June 2020 14:49:54 Ken Strauss wrote:
> I would like to add rigid tapping. Those are some inexpensive encoders
> except the top rated speed is 5000 rpm and I have a 1 rpm spindle.
> Any suggestions regarding suitable pulleys to reduce the speed
> (perhaps 5:1)? Will normal GT2
On Friday 19 June 2020 14:01:54 Chris Albertson wrote:
> There is all the space I need to build an encoder for the HF mill's
> spindle. The sensor will fit above the drawbar.
>
> I'm thinking of using this sensor. The shaft would point down and
> thesensor is aligned with an directly over the
OctoPrint runs on normal PC. It is open-source and written in Python.
Assuming you have a spare PC it's free to use.
Yes, they sell plug-and-go kits and also have SD card images for the Pi4.
Many people need this because they could never learn to install an
open-source Python program on their
The Rockchip and the Allwinner SOC's have integrated microcontrollers
as well for software stepping at high speeds.
https://forum.linuxcnc.org/18-computer/39037-linuxcnc-orange-pi?start=30
On 6/19/20 2:55 PM, John Dammeyer wrote:
A Pi isn't the most suitable unit for that sort of thing.
Sure, but it works.. and *lol* Linux is not good at "Real Time"
? , nothing is good at real time (depending on what you call real time), as
long as you can complete some operations with a given amount of time.
(I work on time sensitive stuff, "real time" issues at scale for a
One more thing. This is a link the the Harbor Freight Mini-Mill. The
list price is $700 and they ALWAYS have 20% off coupons so the actual price
is $560. I can't seriously offer a CNC conversion that more than doubles
the price of the Mill.
So the budget for motors, power supply, Mesa cards
On 06/19/2020 01:01 PM, Chris Albertson wrote:
There is all the space I need to build an encoder for the HF mill's
spindle. The sensor will fit above the drawbar.
I'm thinking of using this sensor. The shaft would point down and
thesensor is aligned with an directly over the spindle.
> -Original Message-
> From: R C [mailto:cjv...@gmail.com]
> Sent: June-19-20 12:45 PM
> To: Chris Albertson; linuxcnc-users-list
> Subject: Re: [Emc-users] Universal spindle speed control for $7
>
>
> On 6/19/20 1:34 PM, Chris Albertson wrote:
> > A 4:1 reduction is possible with gears.
On 6/19/20 1:34 PM, Chris Albertson wrote:
A 4:1 reduction is possible with gears. The sensor would be mounted the
same way but displaced off axis 24 mm then fitted with a 80T gear and
driven by a 20T gear that is itself driven by the drawbar. I would buy l
gears (mod. 0.5 or Pi/2 mm pitch)
A 4:1 reduction is possible with gears. The sensor would be mounted the
same way but displaced off axis 24 mm then fitted with a 80T gear and
driven by a 20T gear that is itself driven by the drawbar. I would buy l
gears (mod. 0.5 or Pi/2 mm pitch) as printed gears are not great in that
tiny
I would like to add rigid tapping. Those are some inexpensive encoders
except the top rated speed is 5000 rpm and I have a 1 rpm spindle. Any
suggestions regarding suitable pulleys to reduce the speed (perhaps 5:1)?
Will normal GT2 belts survive?
> -Original Message-
> From: Chris
There is all the space I need to build an encoder for the HF mill's
spindle. The sensor will fit above the drawbar.
I'm thinking of using this sensor. The shaft would point down and
thesensor is aligned with an directly over the spindle.
On Friday 19 June 2020 13:05:35 Gene Heskett wrote:
> On Friday 19 June 2020 12:58:06 Chris Albertson wrote:
> > I few more things about Marlin 2.0
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > You likey will not be able to turn on all the features at the
On Friday 19 June 2020 12:58:06 Chris Albertson wrote:
> I few more things about Marlin 2.0
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> You likey will not be able to turn on all the features at the same
> time because it will not fit into memory. You can determin this on
> your Linux system.
On Friday 19 June 2020 12:35:53 Chris Albertson wrote:
> You can't connect directly to a PC. You physically wire an Arduino
> "Uno" to the controller board, Then install programmer software in the
> Arduino, in effect turning the Arduino into a programmer. Then the
> Arduino is connected via
I few more things about Marlin 2.0
You likey will not be able to turn on all the features at the same time
because it will not fit into memory. You can determin this on your Linux
system. Simply download from Github and do a compile in the Arduino IDE
and see the size of the
You can't connect directly to a PC. You physically wire an Arduino "Uno"
to the controller board, Then install programmer software in the Arduino,
in effect turning the Arduino into a programmer. Then the Arduino is
connected via USB to a PC.The PC can run any OS.
Then what you load onto
On Friday 19 June 2020 10:10:16 Gene Heskett wrote:
> I can see bed, nozzle tmps, as they heat from a locally launched
> render of yet another 5x5x5, but not the filename or anything else the
> printer might be doing.
>
> Am I supposed to see it all?
>
> Thanks, but puzzled. I'll let it finish
I can see bed, nozzle tmps, as they heat from a locally launched render
of yet another 5x5x5, but not the filename or anything else the printer
might be doing.
Am I supposed to see it all?
Thanks, but puzzled. I'll let it finish the 5x5x5 so I can check
dimensions since I can't stop it from
On Fri, 19 Jun 2020 at 11:13, Roland Jollivet wrote:
>
> I was going to suggest this at the start of the thread, but I thought it
> would be considered too Heath Robinson..
It was a technique used a fair bit in the early days of RobotWars. RC
servo turning pot on golf-cart controller.
It is
On Friday 19 June 2020 06:10:48 Roland Jollivet wrote:
> I was going to suggest this at the start of the thread, but I thought
> it would be considered too Heath Robinson..
>
And within its limitation of available torque to keep the tap turning,
and an encoder able to track to a 5 degree
I was going to suggest this at the start of the thread, but I thought it
would be considered too Heath Robinson..
On Thu, 18 Jun 2020 at 20:40, Chris Albertson
wrote:
> I'm making good progress on my 3D printed CNC conversion. I found a way to
> 3D print a spindle controller that should work
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