> From: Gene Heskett [mailto:ghesk...@shentel.net]
> On Monday 13 September 2021 18:11:44 John Dammeyer wrote:
>
> > Hi Gene,
> > I was able to use your pyvcp information along with the web documents
> > to get my own slider working. In the CAN message screen grab you can
> > see id=218, dlc=4, an
On Monday 13 September 2021 18:20:17 Alan Condit wrote:
> Update, I found some old photos of the motor’s id plate. I thought it
> was rated at 6000 rpm at 110 volts, but it was really only 3000rpm at
> 110volts. When I adjusted the maximum rpm in PNCConf, suddenly I was
> getting a solid “At Speed
Hi John,
Yes, I use step/dir for a harmonic drive AC Servo that as yet still has to be
put into a casting and married to a face plate. For now it sits on the cart
beside the mill and I can make the A axis turn.
http://www.autoartisans.com/mill/HarmonicDrive/D8X_5784_Plastic_Mount.jpg
I did try
On Monday 13 September 2021 18:11:44 John Dammeyer wrote:
> Hi Gene,
> I was able to use your pyvcp information along with the web documents
> to get my own slider working. In the CAN message screen grab you can
> see id=218, dlc=4, and the first two bytes representing 0x0032 in
> Little Endian fo
John,
Thanks for the info so it looks like the Mesa Smart Serial interface can be
used with this drive. If I understand correctly the SSERIAL interface comes
from one of the mesa FPGA I/O cards and connects to the STMBL drive. (I
mean that is one way to interface to the STMBL drive). Otherwise a s
Update, I found some old photos of the motor’s id plate. I thought it was rated
at 6000 rpm at 110 volts, but it was really only 3000rpm at 110volts. When I
adjusted the maximum rpm in PNCConf, suddenly I was getting a solid “At Speed”
indicator.
John,
I will still try measuring the analog
Hi Gene,
I was able to use your pyvcp information along with the web documents to get my
own slider working.
In the CAN message screen grab you can see id=218, dlc=4, and the first two
bytes representing 0x0032 in Little Endian format. That value in decimal is 50.
Scale screen grab shows the sli
On Monday 13 September 2021 16:51:42 Alan Condit wrote:
> John, Peter and Gene,
>
> I have the Cycletrol-150 Manual. It says that you can replace the 5k
> ohm potentiometer with a 0-10v analog signal. The 7i76 manual says
> that you can use it to replace a 5k potentiometer control (0-10v). So
> th
Alan,
Can you run the motor open loop with a 0V-10V power supply?If you remove
the CNC from the loop first then you can measure top speed with 90V and 10V
input.
Next, put the CNC system back on it and use the scope to look at the PWM
output. If it's not a voltage level but still pulses a
John, Peter and Gene,
I have the Cycletrol-150 Manual. It says that you can replace the 5k ohm
potentiometer with a 0-10v analog signal. The 7i76 manual says that you can use
it to replace a 5k potentiometer control (0-10v). So that should work and
indeed seems to be working. I have tried adjus
I'll answer part of my own question but it doesn't answer how to debug Python
programs launched by LCNC.
First of all it's now working!
These two lines
# Copies of CAN dataRelayImage = 0 # No relays set yet.
Mist_PWM = 0# Mister pump motor speed 0
Fan_PWM = 0 # Cooling fan off.
Should
John,
The work has already been done with the STMBL project. The biggest issue with
that one was the 3 phase motor driver was discontinued so that caused a bit of
panic. But it's an open source project that can use step/dir or smart serial
from the MESA boards.
https://github.com/rene-dev/stm
It's been a long time and I have not made much progress. Except now I am
retired from my job as an electrical engineer. In my job I developed
industrial PMAC servo drives for a leading industrial controls manufacturer
located in Milwaukee. So to solve my servo amplifier problem I have decided
to bu
The Python program I wrote includes hal. I'm using a Pi4 with LinuxCNC to test
all this. Thonny on the Pi4 will run a similar pySerial project that doesn't
include hal and spits out CAN messages through the CANUSB so my hardware works.
The original 'simple' version of serial_relays.py still w
Yes, I agree with the words below. I better way to measure torque is to
make a drumwrape a cable around it and lift a bucket. Run the drum at
different PPMs and load the bucket until the drum slows from it's
programmed RPM. THis will allow you to plot an RPM vs torque curve.
What you hav
Friction and elasticity in the ring gear likely account for most of the
difference. I would imagine that the elasticity in the gear would be a
fairly strong impediment to motion. Though calculations seem to be too
much trouble.
On Mon, Sep 13, 2021 at 2:00 PM Sam Sokolik wrote:
> I agree with
I agree with the quick math I did yesterday... But again I have no info
on these steppers..
And yes - I think it is totally usable at 35 ft-lbs.. there is some
friction there also running the 'wave' generator...
On Mon, Sep 13, 2021, 12:26 PM John Dammeyer wrote:
> Nice update.
> My math wor
Nice update.
My math works out as follows:
35 lb-ft is 35 * 12"/ft * 16 oz/lb = 6720 oz-in.
You said the ratio is 100:1 so that means to get 6720 you only input 67.2
oz-in. That's about 1/3 of what you suspect your motor can do.
Something is wrong with this picture then. Especially since yo
On Monday 13 September 2021 06:00:25 Gregg Eshelman via Emc-users wrote:
> You almost sound disappointed that you couldn't break it. ;)
I noticed that too. I haven't broken my version but once, tried to make
it from PLA, but I had a different idea because I wanted a smaller
version, and I have
You almost sound disappointed that you couldn't break it. ;)
On Sunday, September 12, 2021, 06:52:23 PM MDT, Sam Sokolik
wrote:
Small update
https://youtu.be/eW1GGI55Epc
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