On Sat, 20 Jun 2020 at 22:29, Chris Albertson wrote:
> How are the sensors attached? Are they screwed directly to the steel
> housing or is there some kind of plate that all three attach to?
It was a long time ago, and I sold that machine, but I think that they
were screwed direct to the top
This fits my budget criteria for sure.
How are the sensors attached? Are they screwed directly to the steel
housing or is there some kind of plate that all three attach to?
After seeing this I can think of other ways. For one, the slotted disk
could be printed.
As for the question about if
On Sat, 20 Jun 2020 at 19:40, Chris Albertson wrote:
> My plan is to make the sensor removable with no tools so the user can
> access the drawbar.
Here is another way to do it. Sadly I don't have a still, and the
video is out of focus:
https://youtu.be/ZhICrb0Tbn4?t=22
But the encoder there is
Yes, You can even make a 3D printed disk and have holes around the edge
and press sections of drill-rod into the holes and let the bits of metal
rod trigger the sensor. Make say 40 holes around the edge and one hole
near the hub for the index sensor.
Skate board bearing are about the right
On 06/19/2020 11:04 PM, Gene Heskett wrote:
And they work great, on ferrous gears, but they are all nylon in that
machine.
Well, of course, they don't have to be ACTUAL gears. You
could make a thin steel disc with notches, and it would
still trip the sensor.
Jon
On Thu, 18 Jun 2020 at 19:40, 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 for most small milling
> machines and small lathes.
Another alternative is a digital potentiometer:
Hardware is Tormach 770 with Mesa 7i92
> -Original Message-
> From: Gene Heskett [mailto:ghesk...@shentel.net]
> Sent: Saturday, June 20, 2020 5:17 AM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Universal spindle speed control for $7
>
> On Saturd
On Saturday 20 June 2020 00:20:46 Thaddeus Waldner wrote:
> 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
>
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] Universa
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 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] Un
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 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
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.
(perhaps 5:1)?
>> Will normal GT2 belts survive?
>>
>>> -Original Message-
>>> From: Chris Albertson [mailto:albertson.ch...@gmail.com
<mailto:albertson.ch...@gmail.com>]
>>> Sent: Friday, June 19, 2020 2:02 PM
>>>
ndle. Any
>> suggestions regarding suitable pulleys to reduce the speed (perhaps 5:1)?
>> Will normal GT2 belts survive?
>>
>> > -Original Message-
>> > From: Chris Albertson [mailto:albertson.ch...@gmail.com]
>> > Sent: Friday, June 19, 2020 2:02
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 re
[mailto:albertson.ch...@gmail.com]
Sent: Friday, June 19, 2020 2:02 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Universal spindle speed control for $7
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
> From: Chris Albertson [mailto:albertson.ch...@gmail.com]
> > Sent: Friday, June 19, 2020 2:02 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject: Re: [Emc-users] Universal spindle speed control for $7
> >
> > There is all the space I need to build an encoder for t
Chris Albertson [mailto:albertson.ch...@gmail.com]
> Sent: Friday, June 19, 2020 2:02 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Universal spindle speed control for $7
>
> There is all the space I need to build an encoder for the HF mill's
> spindle. T
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 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
On Thu, 18 Jun 2020 at 19:40, Chris Albertson wrote:
>- The angle of the servo shaft is controlled by a PWM signal.
Mesa has a special PWM module intended for controlling these.
--
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of
I'm making good progress on my 3D printed CNC conversion. I found a way to
3D print a spindle controller that should work for most small milling
machines and small lathes. The cost is "almost nothing". These
machines' spindles are controlled by turning a potentiometer so my new
system simply
35 matches
Mail list logo
