On 10/6/22 15:06, John Figie wrote:
A colleague once told me that the harder a bug is to find then the
easier it is to fix. I think there is a lot of truth to that.
John Figie
That is a given John. When a bug is hard to find, you start paying
attention to every byte, and become one
with the
A colleague once told me that the harder a bug is to find then the
easier it is to fix. I think there is a lot of truth to that.
John Figie
On Thu, Oct 6, 2022 at 12:44 PM Thaddeus Waldner wrote:
>
> The solution to hard problems are always in the peripheral vision.
>
>
> > On Oct 6, 2022, at
The solution to hard problems are always in the peripheral vision.
> On Oct 6, 2022, at 12:20 PM, gene heskett wrote:
>
> On 10/5/22 22:56, Jon Elson wrote:
>> Wow, it gets deeper!
>>
>> It is NOT the encoder, or anything in the encoder-reading process.
>>
>> I marked the motor shaft, and
On 10/5/22 22:56, Jon Elson wrote:
Wow, it gets deeper!
It is NOT the encoder, or anything in the encoder-reading process.
I marked the motor shaft, and the motor is returning to the exact same
position every cycle.
Well, I tried a different indicator and mount, and the problem was in
the
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
Lol.. I remember Chris R was working on rigid tapping at one of the fests
in galesberg.. He was using the mazak which had been converted to
linuxcnc.. (I think it had been worked on over a couple fests. ). Anyway
- it didn't seem to be tracking the correct pitch.. (Tapping in plastic).
o: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] losing encoder counts
>
> Wow, it gets deeper!
>
> It is NOT the encoder, or anything in the encoder-reading
> process.
>
> I marked the motor shaft, and the motor is returning to the
> exact same position every cycle.
&
Wow, it gets deeper!
It is NOT the encoder, or anything in the encoder-reading
process.
I marked the motor shaft, and the motor is returning to the
exact same position every cycle.
Well, I tried a different indicator and mount, and the
problem was in the indicator mount! I was using an
On Sun, 2 Oct 2022 at 23:51, Jon Elson wrote:
> I am using my PPMC boards, and I've never
> seen this on my older Bridgeport using the same hardware.
Do you have quadrature error detection in your firmware? ie something
that sets a flag if the speed is non zero but you see an
out-of-sequence
On 10/3/22 07:48, Sam Sokolik wrote:
Our 80's vintage matsuura started losing counts when the 5v supply started
to lower.. don't remember how far down..
Maybe 4.7v?
Wearing my C.E.T. hat, at 4.7 volts, all it can do is crash, and if
there is a resistively terminated scsi drive
involved, it
Our 80's vintage matsuura started losing counts when the 5v supply started
to lower.. don't remember how far down..
Maybe 4.7v?
On Sun, Oct 2, 2022, 11:54 PM gene heskett wrote:
> On 10/2/22 22:25, John Figie wrote:
> > So if you missed an A or a B pulse from the encoder I think you should
>
On 10/2/22 22:25, John Figie wrote:
So if you missed an A or a B pulse from the encoder I think you should see
the position count go in the opposite direction for one count. Another
words, instead of a position sequence of 0,1,2,3,4,5,6,7 you might see
instead 0,1,2,3,2,3, and in addition the
So if you missed an A or a B pulse from the encoder I think you should see
the position count go in the opposite direction for one count. Another
words, instead of a position sequence of 0,1,2,3,4,5,6,7 you might see
instead 0,1,2,3,2,3, and in addition the time spent in 3 followed by 2
would each
On 10/2/22 19:34, John Dammeyer wrote:
Oh boy does that bring back memories.
I started with the US Digital Encoders on the DC Servos. According to the
designer of the PIC upgrade board for the HP_UHU Servo drive the US Digital
were crap and caused nothing but problems.
I switched to CUI and
in China.
So try different encoders.
John
> -Original Message-
> From: Jon Elson [mailto:el...@pico-systems.com]
> Sent: October-02-22 3:49 PM
> To: emc-users@lists.sourceforge.net
> Subject: [Emc-users] losing encoder counts
>
> I thought I was about done with my
I thought I was about done with my R2E3 retrofit project.
But, doing some testing, I found it was losing a little bit
of position when moving. Every axis shows this, but it is
worst on the Y axis. I have a program that moves Y 3" back
and then returns to the indicator. It seems like at 12IPM
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