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Hi 

Thanks for your reply. However, please can you share the required line for inputs in the HAL file for connection eg probe.

I tend to seek out Surface Acoustic Wave touch displays for CNC work. Those can't do multi-touch so the one you linked can't be SAW.
SAW offers gloved-finger operation, resistance to triggering by flying swarf, and a glass front surface for easy cleaning and scratch resistance.

Thanks.

With the daisy chain cabling i got it to work, to the point where i can spin the servos from within linuxcnc. (Now i need some more hardware before i can continue...)

Anybody here use these cheap Amazon touchscreens ? They are usb input for the touch function.
Dragolftie Touchscreen Computer Monitor 21.5 Inch FHD 1920x1080P, Built-in Speakers, VESA Supports, 10-Points Touch Screen PC Display with Type-B HDMI VGA Port, 75Hz Desktop Touch Display, Black amzn.eu/d/fxjCQLI
 

I don't see anything obvious wrong (SSD/DISK errors can cause large latency spikes but I did not see any)

One thing is that you have lots of things in your kernel command line, on similar hardware (intel CPU and MAC) that's
working, I just have (other than the hard disk specific info):

ro quiet splash intel_idle.max_cstate=1 processor.max_cstate=1 idle=poll intel_idle.max_cstate=1 i915.enable_dc=0 isolcpus=3 i915.enable_rc6=0

I converted my lathe from parallel port to mesa when I added linear encoders. Prior to that, I had zero problems threading with the parallel port using this 65 tooth, 260 count disk using a quadrature software encoder on an ancient PC. I only used the spindle encoder for threading (<150RPM) so I'm not sure what the limit for this setup was. I still run 4 identical ancient PCs for my LCNC machines but they all have mesa cards now.

3d printed timing pulleys are a great low cost solution for the low load timing application.

The slotted disk (I used thin copper coated pc board I had laying around) is easy if you have a working CNC router or mill. The finicky part for me was aligning the sensors to the teeth. To get quadrature and index signals all three encoders need to be positioned just right.  

I mounted my ballscrew bearing block directly to the apron. (original mount was damaged) This gives me just enough room for a 12 or 13T timing pulley to pass under the X slide. I may have modified the bearing block for clearance. When you remove all the manual clutter, there is room to mount the x stepper directly underneath so you end up with a shortened x axis that doesn't get in your way.

I used a wireless MPG for a while but found the joypad was much better for jogging and feeding at a consistent rate and I use MDI when I need precise movements anyway. As a bonus, it's easy to cut a nice 45 degree chamfer using the analog stick! 

First you look at the pinout of the firmware:

mesaflash --device 7i95t --addr 10.10.10.10 --readhmid

And then check which GPIO connect to which DB25 pin

Then in the configuration utility or hal file you connect
the selected GPIO pin (or inverted GPIO pin) to the linuxCNC
function pin you need

The expansion pinout on a 7I95/7I95T looks like this (from mesaflash --readhmid)

PIN                             GPIO
P1-01/DB25-01          41   IOPort       None           
P1-02/DB25-14          42   IOPort       None           
P1-03/DB25-02          43   IOPort       None           
P1-04/DB25-15          44   IOPort       None           
P1-05/DB25-03          45   IOPort       None           
P1-06/DB25-16          46   IOPort       None           
P1-07/DB25-04          47   IOPort       None           
P1-08/DB25-17          48   IOPort       None           
P1-09/DB25-05          49   IOPort       None           
P1-11/DB25-06          50   IOPort       None           
P1-13/DB25-07          51   IOPort       None           
P1-15/DB25-08          52   IOPort       None           
P1-17/DB25-09          53   IOPort       None           
P1-19/DB25-10          54   IOPort       None           
P1-21/DB25-11          55   IOPort       None           
P1-23/DB25-12          56   IOPort       None           
P1-25/DB25-13          57   IOPort       None     
 

I was thinking of drilling 2mm holes on a 70mm diameter. So there could be 55 holes.

The amount of sensors is a good idea for scaling this up!

The Hardware will be a Mesa 7i96, i think it has a 1mhz max input frequency.

But whats the minimum pulses per rotation that is going to still give good results? That would be very interesting to me.

Greetings from germany!
 

just start designing whatever you like, the template is just a starter. you can open probe basic and use it as a template also if you prefer.. its completely up to you what you create.

@noqui

In the ui, I add a lineEdit wich I named "ofedit" (and some more) and then in qtaxis_handler.py I add (the except part is just here to allow me to try without the thrue work order barcode) :

def ofedit_changed(self):
if len(self.w.lineEdit.text()) == 16:
try:
codesData = pd.read_csv('codes_articles.csv', index_col=0)
self.w.lineEdit_3.setText(self.w.lineEdit.text()[0:16])
self.w.lineEdit_2.setText(codesData.loc[self.w.lineEdit_3.text(), "Variante"])
except :
self.w.lineEdit.setText("EJEVAP17050---M")
self.w.lineEdit_2.setText("")
self.w.lineEdit_3.setText("")
pass

This allow to look into a csv file for the work order code if I read something which is 16 caracters long with the barcode reader

I've started a new series of tutorials for Flex GUI because of all the improvements I've made to Flex over the last 6 months or so. The first tutorial shows how to install using Debian apt so updates are automagical.



JT

that's good to know. I am glad that storm turned into a whole lot of not much.

Depends also on the number of sensors. If you increase the number of sensors it will give you more pulses per revolution. ( I think to put 4 sensors on the thing is a realistic approach)

The hardware is also a factor. How many ppr can your system keep track of?

Then (i did not try it) a floating tap holder can help compensate small deviations when it is not super accurate.

is this resolved now?
forum.linuxcnc.org/26-turning/55587-wema...a-or-ethercat#323507

Hi.

How do we add the inputs for the 5axis BOB pins in the hal files? Please share the lines that needed to be added for inputs oF BOB in the hal files.