Kfop+Kstep loosing steps

[ltran2000]

Hi, Tom
Can you help with relay on/off set up for spindle, I tried to hook-up
but seem like it is not working, here is my set-up:
---power supply 24V+ to kstep JP33-pin1(relay 0+)
---power supply 24V- to relay 24V-
---relay 24V+ to kstep JP33-pin2(relay 0-)
--- a diode across relay pins.
Do I need a script or kflop comes with script by default ?
by looking at "InitKStep3Axis" I don't see any relate info there.Thanks

[TomKerekes]

Hi Itran2000,


The wiring sounds correct. You didn't specify the direction of the diode. If placed the wrong way it will short circuit the Relay. It should "point" from the negative to the positive relay terminals so it doesn not normally conduct.

See:

Using KStep

under Relay Driver Outputs

You can just use the Digital IO Screen to test. All you need to do as set as an output and toggle the state.

From C code it would be:

SetBitDirection(0,1); // set bit 0 (Relay0) as an output
SetBit(0); // set bit 0 (Relay0) on

Regards

[ltran2000]

Hi Tom
my wiring is correct (also the diode) after adding
" SetBitDirection(0,1); // set bit 0 (Relay0) as an output
SetBit(0); // set bit 0 (Relay0) on"
to InitKStep3Axis.c ,
from KmotionCNC when I click on INIT button the relay on right away, (I can turn relay on/off from Kmotion), It should be turn on at
beginning of Gcode and off after finish the gcode, can I have a code for this, Thanks

[TomKerekes]

Hi Itran2000,

What is the purpose of the relay? Spindle? You can assign an MCode to turn on the relay and another to turn it off. Normally M3 and M5 are assigned to turn on and off the spindle. Then place M3 at the beginning of the GCode and an M5 at the end.

Change the code in the Init program from SetBit to ClearBit so the relay will be off when the system is initialized.

Regards

[ltran2000]

Hi Tom
Yes, relay for spindle on/off, Gcode contain M3 and M5
how do I change from setbit to clearbit ?

[ltran2000]

and exactly where to add these line to InitKStep3Axis.c
SetBitDirection(0,1); // set bit 0 (Relay0) as an output
SetBit(0); // set bit 0 (Relay0) on

Thanks

[TomKerekes]

Hi Iran2000,

You may as well add those lines toward the beginning of the Init.c main program. For example just before this line:

ch0->InputMode=NO_INPUT_MODE;

But as I described change SetBit to a ClearBit so the Spindle is initially off.

Within KMotionCNC under Tool Setup | M3-M9

Configure M3 to turn on bit 0 and configure M5 to turn off bit 0.

Regards

[ltran2000]

Hi Tom
From Kmotioncnc/toolsetup I adjust to:

----M3 I/Obit setbit 0 to 1
----M5 I/Obit setbit 0 to 0

and add your code: SetBitDirection(0,1); // set bit 0 (Relay0) as an output
SetBit(0); // set bit 0 (Relay0) on

the relay on right away after I click INIT button, after i replace your code
with this code from the manual:

SetBitDirection(0,1); //set as output

SetBit(0); // turn output on

ClearBit(0); // turn output off

everything working as it should be, I just post here in case someone want to use it. Thanks for all your help.

[ltran2000]

I am setting homing right now, seem work ok, I need hexagon bit # 168,169,170 to set limit switch since I can't enter these bits through Kmotion. Thanks

[TomKerekes]

Hi Iran2000,

That bug has been fixed in test version

http://dynomotion.com/Software/KMotion429z.exe

or the values in hex for 168, 169, 170 are a8, a9, aa.

Regards
TK

[ltran2000]

Hi Tom,
All my spindle relay, homing/limit switches work perfectly for Kflop+Kstep,
now I need wiring diagram for spindle relay for kflop to use with Gecko drives.Thanks

[TomKerekes]

Hi Itran2000,

KFLOP itself only has LVTTL inputs. Some with series 47 ohms to make them +5V tolerant. JP4 and JP5 each have 8 with 150 ohm pull down resistors (all others are high impedance).

So depending on your limit switches you will basically need to come up with an interface to 3.3V LVTTL IO.

There are 3rd party modules that can convert 24V limit switches to 5V signals and provide opto isolation (such as opto22 modules).

If you don't require opto isolation a series ~500 ohm resistor to one of the JP4/JP5 inputs with the internal 150 ohm pull down resistor switched to +12V can work. A 0.1uF ceramic capacitor from the input to ground can add filtering if required.

For relay outputs, Winford sells a 4 output low cost relay board that the KFLOP ouputs can drive.

Otherwise solid state relays that accept a 3V input can also be used.


If you come up with a wiring diagram we can check it for you.

Regards