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``if you want max torque but lower rotation speed, use the two wires with most resistance, in your case use A1/A2 and B1/B2 and leave ACOM/BCOM unconnected``
Thanks a lot Tom, will check first, exactly what you said, that is how i wanted to connect.

Do NOT use the COM motor wires on new drives!!!
Do NOT use 5 wire stepper motors with new drives!!!
New drives are always "bipolar" meaning each winding has it's own H-bridge.
Old drives were "unipolar" meaning each winding was driven by a single transistor/MOSFET to ground, while all 4 pins from one side of all 4 windings was wired to + (positive) of the power supply.
Use a DVM in OHM or BEEP mode to find out what wires belong to the same winding, and based on resistance you can also figure out the middle wire, see bellow:
-if you want max torque but lower rotation speed, use the two wires with most resistance, in your case use A1/A2 and B1/B2 and leave ACOM/BCOM unconnected. Do isolate them so they do not touch.
-if you want more speed at lower torque, use the middle wire and 1 of the remaining 2 wires, it does not matter which one, just one.

Hello,
I'm currently implementing a retrofit for our SHW UF31. So far, progress is pretty good. But I have a small problem with the gear selection.
I'm using Classic Ladder to shift the three gears. It works quite well so far. I have a float input for the spindle speed, which is used to select and engage the correct gear.

The plan is to use the S command to set the gear. But I don't know which HAL pin I can use to query the set speed without the spindle running.

So what I need is a way to read this system parameter in the HAL / Classic Ladder:
#<_rpm> - Return the current value of S, not the actual spindle speed.

Best regards, Stefan

Hi i want know if existe a command in terminal for read the value the hal pin, not in cyclic mode, but read value only at start the hal command interminal.

Do they show driver and module in use?
I would guess at yes... as the flags are only "medium devsel"

Model: PAR5408AXX200
Chipset: Sunix SUN1989
Interface: PCIe
Supports PS/2: YES
Supports EPP: NOT TESTED
Supports IN Mode: YES (in PS/2 Mode)
Supports X Mode: NO (Control port pins voltage drops to ~0,3 V when connected to ground through 470 ohms resistor, but pins states won't change)
Tested OS: linuxcnc-2.8.4 / Debian Buster
Tested Computer: Dell Optiplex 760

thank you guys, you helped me a lot, I realized that these are in fact stepper drivers and motors, the voltage is 45vdc, I will buy a simple stepper driver and try to connect phases a,a+,b,b+ and according to my understanding ``com'' I should short-circuit two pairs (wires) of aCOM and bCOM separately 

Model: PAR5008LVX100
Chipset: Sunix SUN1999
Interface: PCI
Supports PS/2: YES
Supports EPP: NOT TESTED
Supports IN Mode: YES (in PS/2 Mode)
Supports X Mode: NO (Control port pins voltage drops to ~0,3 V when connected to ground through 470 ohms resistor, but pins states won't change)
Tested OS: linuxcnc-2.8.4 / Debian Buster
Tested Computer: Dell Optiplex 760 

Better info here
cnc.zone/hardware/controllers/contr-mk3
and here
cnc.zone/tng/tng

There is a demo download, ask the guy from Norway to download and test.
If he is hooked on it he should try it.

Hello gentlmen,

excuse me but have anybody active project with in the moving stage and can share basic code configuration files please?

I am very interested in the this topic because I am working with Metronix ars servo on my table over profibus and finally I have finished with internal acceleration generator and I need to come with external refrence which should be genereted as I think from the component out of @Grotius workshop ...what and which should be declared for basic workbench setup

Really thank you for your experiences ... that SJOB from @Grotius is MAGIC

Regards... 

May contain up to 15% hocus-pocus.

Hi Arciera,

The scurve planner takes the [TRAJ] trajectory acceleration : MAX_LINEAR_ACCELERATION = 200
When tpAddLine, tpAddCircle is done, it gives this 200 value to the planner.
The scurve acceleration max is then 2*200=400 at inflection point.

However the planner does not lower the acceleration to a specifik max joint acceleration at the moment.
We have acces to all joint max acceleration values.

We could reduce max acceleration to satisfy max joint acc. We implement this without any problems.

If the acc in the ini file is 50, the scurve is max 2*50=100 at inflection point. This is normal.

But the acc-cmd value reaches ~180?


[edit]

I did do a 'git pull' and reran './installer' but I can check again tomorrow.

Hi Arciera,

Thanks for feedback.
If the acc in the ini file is 50, the scurve is max 2*50=100 at inflection point. This is normal.

However. I run the same file, and i got no spikes.
This is the first corner :
 

Maybe you did not update the clothoid lib? U used clone recursive wich is needed.
Or git is messed up.

For sure i just did a push for scurve planner, clothoid lib, scurve as up to date.
That's annoying when you have 3 repository's depending on each other.

Hi guys, the thread has been dormant for a while, but I had implemented homing to max "Z" in the meantime. The challenge is now, that depending on the position of the tail stock, it could be in the way of reaching the max "Z" position. I assume, that this is different for a classical CNC lathe, but since I have a conventional lathe converted to CNC, the tailstock is an issue I have not thought about.

How do other people deal with that ?