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I retrofitted a Maho and kept it's DC servos...

forum.linuxcnc.org/12-milling/33035-retr...ing-a-1986-maho-400e

Starting point after referencing the machine:
- The cylinder for spindle support is extended 

The spinport.comp component monitors the position of the axis.
- When the axis reaches position 900, the cylinder is retracted, and when the axis reaches position 1600, the cylinder is extended again.
position axis.x.pos-cmd > 900 Cylinder retracted
position axis.x.pos-cmd > 1600 Cylinder extended 

What I need now is a check to see whether the cylinder is really retracted at the axis position between 900 and 1600 so that the axis can move through!For monitoring purposes, the cylinder is equipped with a reed contact when retracted.

Another factor that must be taken into account during monitoring is that the axis travels a certain distance during the time the cylinder is moving.The spindle support is at the axis position 1250 and I am traveling at a maximum speed of 4 m/s.

After thinking about it, also with your help, all that really needs to be checked is whether the cylinder is retracted between axis positions 1000 and 1500. 

position axis.x.pos-cmd > 1000 and < 1500 ---> cylinder retracted 

I think 100 mm in both directions should be enough for the cylinder movement!?!If that is the case, everything is fine. If the cylinder is not retracted, all axes must be stopped. 

Now the only question is whether the check should be monitored in the spinport.comp file or in the HAL,and what could the code look like?  

Hi, is there any more testing and progress on the scurve planner to report?
-automata

Hi, anyone got latest pathpilot v2.12 code working with python3 or get python2 installed in any recent version of debian?
I have V2.12 source code but can't compile it with python3 on debian bookworm. Now can I install python2 (easily) on debian bookworm.
Can someone suggest a way out?
-automata

Sure, I'll try and do this sometime tomorrow 

1. yes
2. yes
-
Mesa 7i96S can have inputs set as active low or active high, so pretty much any sensor works.
LinuxCNC can use a single switch to do homing and both limits for any of the axis/joints.
Do download and read the Mesa manual while connecting sensors, it will save you a lot of time.

Please excuse the n00b questions as I work to setup my small AXYZ cnc router. Does anyone know how I should
implement limit switches in Linuxcnc? The factory wiring of my old millennium cnc router has a single blue tipped inductive proximity limit sensor on each axis. The sensors are located at the top of the z-axis, front of the y-axis and left on the x-axis. Each sensor has connections notated sig, 12v and ground. 

My assumption is that these are NPN, Normally Open (NO), but will confirm:

• Normal state (no metal detected): Sig wire outputs ~12V

Activated state (metal detected): Sig wire outputs ~0V

Two questions:
1) Will these play nicely with the 7i96s card I’ve ordered?
2) Are these be sufficient for homing the router? 
 

I would need a Bitfile for the 6i25, the 7i74 is on P3 and the 7i85 is on P2, if that possiple ?

[code]about the laptop/PC, try to reinstall the rio.c component:

[code]sudo halcompile --install riocore/files/rio.c

[/code][/code]


 

It worked, problem was on the hadrware side. Another USB Hub did the trick.

Better to use the on card 7I95T encoders for machine feedback.
You can put high speed encoders on the expansion ports
but for feedback use its better to use differential signaling
and the 7I95T already has 6 encoder input designed for this.

halcmd (and hal)  are fine with true/false for bit types:

pcw@pcw-HP-Compaq-Elite-8300-USDT:~/linuxcnc-dev/src/hal/components$ halcmd setp hm2_7i96s.0.ssr.00.out-00 true
pcw@pcw-HP-Compaq-Elite-8300-USDT:~/linuxcnc-dev/src/hal/components$ halcmd getp hm2_7i96s.0.ssr.00.out-00 TRUE

pi@raspberrypi5:~/linuxcnc/nc_files $ ./M101
bash: ./M101: cannot execute: required file not found

Likely means that bash was not found.



 

To PCW: I would use 5v encoders... are the parallel expansion ports capable of high speed encoders? like 1um linear scales?
7i73 looks like a nice option as well.
Thanks!

I do understand you can vary the scaling of the ppr->movement, the machine im retrofitting never had any scale switch, though never using this machine originally, i dont know exactly how it functioned. It is a good idea though. Thanks!

It's finding bash fine, the command requires either a 0 or 1 as input, going by the error message, not a "True" or "False"


It's kind of hard to debug without seeing the script.

My comment regarding true or false is incorrect, thanks PCW.

Should the command be run from a bash command line or within a halcmd session ?

I've gone all rusty as of late...must be the dust from the build garage storage

Awesome. Glad it's working!