Advanced Search

Search Results (Searched for: )

  • Willemsjos
  • Willemsjos
06 Aug 2024 15:32

Hardware advise mesa boards for control-loop with motor-encoder and linear scale

Category: Driver Boards

Thanks.
Do I read between the lines, that you think it hardly makes sense?

If the hardware would be “perfect” with no backlash at all, there would'nt be an necessity for linear scales… And with backlash it is “problematic”.

Originally, the machine had tacho’s on the motors, to detect the motors were spinning and to control theirs rpm... Based on the position measurement of the linear scales (distance to go), the loop was closed until position was reached.

Would that principle be different if I would use step/dir instead of analog +/-10VDC in the old situation? The resolver needs at least 10x higher resolution than the 1um resolution of the linear scales I presume….

And is there then a necessity for a drive with two resolver inputs? Or can a controller-card take over the correction of backlash (which will be in any case)
Do they even exist without paying the highest price?
  • juliankoenig87
  • juliankoenig87
06 Aug 2024 15:31
Replied by juliankoenig87 on topic Probe panel for Axis GUI

Probe panel for Axis GUI

Category: AXIS

In the xml you can change mm to inch for the tab. Thats just optical change.
  • juliankoenig87
  • juliankoenig87
06 Aug 2024 15:30
Replied by juliankoenig87 on topic Probe panel for Axis GUI

Probe panel for Axis GUI

Category: AXIS

In the probe_pocket macro:

#<ff_distance> = 5 (5 mm distance to contact with fast forward speed)

Just change accordingly.
  • PhilipME
  • PhilipME's Avatar
06 Aug 2024 15:29 - 06 Aug 2024 15:36
Replied by PhilipME on topic G53, and G54

G53, and G54

Category: General LinuxCNC Questions

I dont have homing (I bought the limit switches but did not install them yet )

So every start I have to zero x,y,z and that will be my G53 every time.

What I am doing now is G53 G0 x0 y0 then I shut the machine

next start I will set x, y to zero again to set g53 again. For some reason G54 is saved. But it is useless if G53 is lost.

Thanks

Philip


Edit : 

apology

I just realized that my question has no meaning.

I have to install the limit swiches, be able to home, then G54 will work because it is saved.

 
  • OGMaker
  • OGMaker
06 Aug 2024 15:24

[ Vfdmod ] An easy VFD control over MODBUS RTU

Category: HAL

 

File Attachment:

File Name: vfdmod-0.3...md64.zip
File Size:33 KB

It looks lilke aekhv has pulled the project :-( There are are forks of it, but forking doesn't capture the wiki or the project or the releases. I'll attach the debian 3.2 release in case you still want to use it..
  • TheRoslyak
  • TheRoslyak's Avatar
06 Aug 2024 15:21 - 06 Aug 2024 15:22
Replied by TheRoslyak on topic Monitoring SDO value

Monitoring SDO value

Category: EtherCAT

Since no advice was forthcoming, I decided to develop my own component that can monitor and change SDO parameters.
Essentially, this will be a similar component to the one currently working with EtherCAT LinuxCNC but specifically for manipulating SDO data. Unlike the existing driver, it will work with YAML, which is much more convenient than XML.
An approximate example of such a file will be attached. If there are any suggestions, I would be happy to hear them.
I think I will start this week and finish in about a week. Later on, it will be possible to integrate the old functionality for working with PDO.
Although the current one works well, it has its drawbacks.

PS Admins, please add yaml and yml formats to the editor.
  • juliankoenig87
  • juliankoenig87
06 Aug 2024 15:13
Replied by juliankoenig87 on topic Probe panel for Axis GUI

Probe panel for Axis GUI

Category: AXIS

Yeah inches...

Ok. There are two minor things to change. I am currently not at home but can answer later in more detail.

One is the fast forward in between a pocket. Here I use 5 mm to the estimated contact to use faster speed while probing. 5 inches just leads to the fact that there ist no faster movement.

The second one you find yourself. I have some (yes I know quick n dirty programmed) safety functions. In inches the values are way smaller so that the macro thinks that the probe is not calibrated.

Can you show your tool table please.

Julian
  • OGMaker
  • OGMaker
06 Aug 2024 15:11

[ Vfdmod ] An easy VFD control over MODBUS RTU

Category: HAL

If you having trouble finding it, see github.com/thestealth131205/vfdmod

I'm not sure if the project has been hijacked, or the original owner changed his login without realizing the impact on his links. The good part is that the bits are all still there. I'll be making a fork to have a backup in case it goes away...
  • PCW
  • PCW's Avatar
06 Aug 2024 15:01
Replied by PCW on topic 3 Achs Fräse mit MESA 7C80 und Raspi 4

3 Achs Fräse mit MESA 7C80 und Raspi 4

Category: Deutsch

The spindle output is _not_ a PWM output but rather
an isolated analog output used to replace the potentiometer
of a VFD.

If you need a 5V PWM signal, you would need firmware
that includes a pwmgen with an output on a 5V pin

7c801p_5abobd.bit

Is one, this replaces STEP5 with a PWM output

 
  • Lpkkk
  • Lpkkk
06 Aug 2024 14:57
Replied by Lpkkk on topic Positioning issue on remora with nvem

Positioning issue on remora with nvem

Category: Basic Configuration

I've tried different deadband settings by adding to my hal :

setp remora.joint.0.pgain [JOINT_0]P_GAIN
setp remora.joint.0.ff1gain [JOINT_0]FF1_GAIN
setp remora.joint.0.deadband [JOINT_0]DEADBAND

And to my ini in joint 0 section :

P_GAIN = 1
FF1_GAIN = 1
DEADBAND = 0.001

I've tried different values like 1, 0.5, 1.1, all of them didn't change anything.
  • TucsonSean
  • TucsonSean
06 Aug 2024 14:56 - 06 Aug 2024 15:22
Replied by TucsonSean on topic Probe panel for Axis GUI

Probe panel for Axis GUI

Category: AXIS

Ok, two more questions:

First, what is the procedure for using this with a machine set to inches for the units?  I have converted the mm values to inches in the ini files but are there other values that need to be adjusted in other files?

Second, the calibration completes and enters the data into the tool table (I checked the file and there are now X, Y, I and J values added to Tool 99). When I try to do any other probing operatoin, i get the following error: No calibration data found in tool table. Please do a calibration. aborting
I re-ran calibration and now it is working. 

So, my first question still stands.

-Sean
  • TucsonSean
  • TucsonSean
06 Aug 2024 14:44
Replied by TucsonSean on topic Probe panel for Axis GUI

Probe panel for Axis GUI

Category: AXIS

I tried using 2.7 and I kept getting dbounce error and LinuxCNC would not load. I upgraded to 2.8.4 and I did not get the dbounce error any longer.
  • PCW
  • PCW's Avatar
06 Aug 2024 14:41 - 06 Aug 2024 14:42
Replied by PCW on topic Latency Test OK, dennoch Fehlermeldung

Latency Test OK, dennoch Fehlermeldung

Category: Deutsch

So you are saying that changing eno1 coalesce settings affects the other interface?
That's extremely weird

Is it possible both interfaces are sharing an interrupt?

(lshw should show this)
  • Aciera
  • Aciera's Avatar
06 Aug 2024 14:35
Replied by Aciera on topic G53, and G54

G53, and G54

Category: General LinuxCNC Questions

G53 is your machine reference point that is set during homing.
G54 .. g59 should be saved when you exit linuxcnc. At least that is what happens on my installations.
  • PCW
  • PCW's Avatar
06 Aug 2024 14:34

Hardware advise mesa boards for control-loop with motor-encoder and linear scale

Category: Driver Boards

Note that whatever control hardware is used, tuning will be problematic
unless you can remove almost all backlash from the mechanical system.
 
Displaying 23176 - 23190 out of 25552 results.
Time to create page: 0.673 seconds
Powered by Kunena Forum