On Thursday 28 May 2020 02:08:46 Thaddeus Waldner wrote:
> Here’s one that I have used successfully:
>
> https://www.thingiverse.com/thing:16627
>
> It is a parametric pulley designed in OpenScad. I believe the
> Thingiverse website allows you to configure openscad designs from the
> website,
Use half a shaft coupler as a hub for attaching a 3D printed part to a shaft.
https://hackaday.com/2019/09/02/misuse-this-part-to-attach-3d-printed-stuff-to-a-shaft/
On Thursday, May 28, 2020, 12:11:32 AM MDT, Thaddeus Waldner
wrote:
Here’s one that I have used successfully:
Yes, the better one is better, especially when you want to move to AB or
other plastic types. Some people like to print on glass. I use aluminum
bed at 60 C coated with glue stick glue. Glass with hair spray works and
blue painters tape. Everyone developes their own prefferce.
As for
To find a well-designed timing pulley, go to any web site that sells
pulleys. SPD/SI is one of the best.Then find the pulley or gear you
would like and there will be a link to download a CAD file for that exact
gear/pulley. McMaster Carr also has CAD files for all their stuff. So dose
Boston
One key to good FDM printing is a steady ambient temperature *with no airflow*
around the printer. A bit of a breeze can cause uneven shrinkage and warping.
That's why some printers are enclosed and building a printer enclosure is a
popular thing.
If you're wanting to get your 3D printing feet
.
-- Ralph
From: andy pugh [bodge...@gmail.com]
Sent: Wednesday, May 27, 2020 6:21 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] FERROR MIN_FERROR value?
CAUTION: This email originated from outside the Walla Walla University email
system
Here’s one that I have used successfully:
https://www.thingiverse.com/thing:16627
It is a parametric pulley designed in OpenScad. I believe the Thingiverse
website allows you to configure openscad designs from the website, then
download the.stl. But you can also download the Openscad file.
On Wednesday 27 May 2020 23:23:39 Chris Albertson wrote:
> On Wed, May 27, 2020 at 5:38 PM Gene Heskett
wrote:
> > On Wednesday 27 May 2020 20:10:44 Chris Albertson wrote:
> > > By total coincidence, I just made both. I needed 30T, 40T, and
> > > 60T pulleys. I tried printing them and they
On Wed, May 27, 2020 at 5:38 PM Gene Heskett wrote:
> On Wednesday 27 May 2020 20:10:44 Chris Albertson wrote:
>
> > By total coincidence, I just made both. I needed 30T, 40T, and 60T
> > pulleys. I tried printing them and they fail after a while. The
> > plastic simply will not hold the set
On Thu, 28 May 2020 at 01:13, Chris Albertson wrote:
> By total coincidence, I just made both. I needed 30T, 40T, and 60T
> pulleys. I tried printing them and they fail after a while. The plastic
> simply will not hold the set screw then they slip on the shaft.
There was an interesting
On Wednesday 27 May 2020 20:10:44 Chris Albertson wrote:
> By total coincidence, I just made both. I needed 30T, 40T, and 60T
> pulleys. I tried printing them and they fail after a while. The
> plastic simply will not hold the set screw then they slip on the
> shaft. The big thing is if the
By total coincidence, I just made both. I needed 30T, 40T, and 60T
pulleys. I tried printing them and they fail after a while. The plastic
simply will not hold the set screw then they slip on the shaft. The big
thing is if the motor gets warm it heats the plastic. The solution has to
print
On Wednesday 27 May 2020 00:51:57 Gene Heskett wrote:
> On Tuesday 26 May 2020 19:45:10 Chris Albertson wrote:
> > On Tue, May 26, 2020 at 3:01 PM Gene Heskett
>
> wrote:
> > > Those closed loop motors and controllers have arrived, and I
> > > puzzled by a total lack of docs other than the
On 05/27/2020 01:52 PM, Chris Albertson wrote:
On Wed, May 27, 2020 at 11:34 AM Gene Heskett wrote:
Have any idea how much spring there is in the iron?
I know that just leaning on the head of my Bridgeport will
deflect the spindle .001" easily.
I often do this when using a boring bar to
Not much math. Tie a spring scale (aka "fish scale") to an end mill placed
in the chuck and pull sideways, Record the force on the scale and use a
dial indicator to measure the deflection of the end mill. Plot a few
points.With no math you now know the "spring" in the system. One
thing,
On Wednesday 27 May 2020 11:38:05 Peter C. Wallace wrote:
> On Wed, 27 May 2020, N wrote:
> > Date: Wed, 27 May 2020 17:18:16 +0200
> > From: N
> > Reply-To: "Enhanced Machine Controller (EMC)"
> >
> > To: "Enhanced Machine Contro
On Wednesday 27 May 2020 11:20:46 N wrote:
> > On Tuesday 26 May 2020 16:29:17 Chris Albertson wrote:
> > > Gene,
> > >
> > > I'm also looking at using a closed-loop stepper for a z-axis
> > > drive. On my system the z-motor's torque holds the full weight of
> > > the head. With a standard open
On Wednesday 27 May 2020 11:18:16 N wrote:
> > On Tue, 26 May 2020 at 19:45, Gene Heskett
wrote:
> > > I just tried an experiment. Since there are no pid's in that
> > > sheldon setup, I commented out the *ERROR entries in the .ini
> > > file. Interesting as it made zero difference in how it
On Wed, 27 May 2020, N wrote:
Date: Wed, 27 May 2020 17:18:16 +0200
From: N
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] FERROR MIN_FERROR value?
On Tue, 26 May 2020 at 19:45, Gene Heskett w
> On Tuesday 26 May 2020 16:29:17 Chris Albertson wrote:
>
> > Gene,
> >
> > I'm also looking at using a closed-loop stepper for a z-axis drive.
> > On my system the z-motor's torque holds the full weight of the head.
> > With a standard open loop motor full current is used and the motor
> >
> On Tue, 26 May 2020 at 19:45, Gene Heskett wrote:
>
> > I just tried an experiment. Since there are no pid's in that sheldon
> > setup, I commented out the *ERROR entries in the .ini file. Interesting
> > as it made zero difference in how it ran.
>
> That probably means that the default
On Tuesday 26 May 2020 19:45:10 Chris Albertson wrote:
> On Tue, May 26, 2020 at 3:01 PM Gene Heskett
wrote:
> > Those closed loop motors and controllers have arrived, and I puzzled
> > by a total lack of docs other than the u-step ratios printed on the
> > cover. Thats covered by dip sw1-4,
On Tue, May 26, 2020 at 3:01 PM Gene Heskett wrote:
>
> Those closed loop motors and controllers have arrived, and I puzzled by a
> total lack of docs other than the u-step ratios printed on the cover.
> Thats covered by dip sw1-4, but its a 6 pos switch, and 5 & 6 are in
> Chinese pictograms.
On Tue, 26 May 2020 at 19:45, Gene Heskett wrote:
> I just tried an experiment. Since there are no pid's in that sheldon
> setup, I commented out the *ERROR entries in the .ini file. Interesting
> as it made zero difference in how it ran.
That probably means that the default values are large.
On Tuesday 26 May 2020 16:29:17 Chris Albertson wrote:
> Gene,
>
> I'm also looking at using a closed-loop stepper for a z-axis drive.
> On my system the z-motor's torque holds the full weight of the head.
> With a standard open loop motor full current is used and the motor
> gets hot because
On Tuesday 26 May 2020 15:55:36 N wrote:
> > ...
> > I just tried an experiment. Since there are no pid's in that
> > sheldon setup, I commented out the *ERROR entries in the .ini file.
> > Interesting as it made zero difference in how it ran. So, it appears
> > that I'll need to synth an error
On Tuesday 26 May 2020 11:55:05 Jon Elson wrote:
> On 05/25/2020 07:43 PM, Gene Heskett wrote:
> > Without PID's, where do we get a following error that we
> > can see on the halscope?
>
> OK, WITHOUT a PID, then the step generators have a maximum
> speed, set by (possibly)
> BASE_PERIOD,
Gene,
I'm also looking at using a closed-loop stepper for a z-axis drive.On
my system the z-motor's torque holds the full weight of the head. With a
standard open loop motor full current is used and the motor gets hot
because there is more current than needed. The closed loop system puts
> ...
> I just tried an experiment. Since there are no pid's in that sheldon
> setup, I commented out the *ERROR entries in the .ini file. Interesting
> as it made zero difference in how it ran. So, it appears that I'll need
> to synth an error signal, and the best way I can think of it to
On Monday 25 May 2020 20:43:45 Gene Heskett wrote:
> On Monday 25 May 2020 18:33:29 Jon Elson wrote:
> > On 05/25/2020 02:50 PM, N wrote:
> > > Do anyone here have any suggestion for FERROR and MIN_FERROR
> > > values?
> >
> > It depends on your "user units", as well as the general
> > accuracy
On 05/25/2020 07:43 PM, Gene Heskett wrote:
Without PID's, where do we get a following error that we
can see on the halscope?
OK, WITHOUT a PID, then the step generators have a maximum
speed, set by (possibly)
BASE_PERIOD, step_width and step_space. If you set maximum
velocity in the ini file
> > Do anyone here have any suggestion for FERROR and MIN_FERROR values?
> >
> It depends on your "user units", as well as the general
> accuracy and speed of the machine.
Unit is not important just have know which is used and do conversion from inch
to mm if necessary. Try to figure out what
On Monday 25 May 2020 18:33:29 Jon Elson wrote:
> On 05/25/2020 02:50 PM, N wrote:
> > Do anyone here have any suggestion for FERROR and MIN_FERROR values?
>
> It depends on your "user units", as well as the general
> accuracy and speed of the machine.
> FERROR is a multiplier to velocity in user
On 05/25/2020 02:50 PM, N wrote:
Do anyone here have any suggestion for FERROR and MIN_FERROR values?
It depends on your "user units", as well as the general
accuracy and speed of the machine.
FERROR is a multiplier to velocity in user units/second that
is added to MIN_FERROR.
MIN_FERROR is
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