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Topics - murilolana

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VB and the development of wizards / Tool zeroing macro help
« on: November 08, 2012, 08:01:40 PM »
Hi everyone,

I need some help on writing a macro for zeroing the tool. I always zero the tool by the center of the work piece, so I touch one side of the piece with the tool or edge finder, then zero it, go to the other side and touch the piece again; then I divide the DRO value by 2 and that's it. same procedure for both x & y axis.
So, here's my idea: a macro that would get the DRO value, divide it by two, move the axis to this new value and zero the tool.
Can anyone help me writing this?


 Hey guys,

I'm having some problems setting up my electronics. The configuration is: SS, C11G,  G320X, KL2200 spindle, keling VFD22, 72V 20amp power supply.
I've pre assembled everything on a MDF sheet, just for testing the motors, drivers, bob and VFD. Everything seemed to be fine on these tests.  I could even  calibrate the spindle and the VFD  didn' t cause any interference that I could notice. 
Now my machine is assembled and I started to wire limit switches and everything else for testing. I could tune motors and put the limit switches to work, but when I tried to run the spindle the system crashed. As soon as I gave a M3S*********x command I got the following message:

Error returned from USB function FT_write


Bytes requested: 192
Bytes written: 0

I couldn't run the spindle for 1 second cause in the moment the CW relay turned on, the SS crashed. When this occurs the red led on the SS stops to blink and I need to switch it off and restart Mach3.
I unpluged the spindle cable and gave the M3S*********x command again and got no problem, so the VFD itself is not causing the noise to SS board. I figured out that the spindle is causing the noise, somehow it is throwing interference through its cable.
I'm powering the analog 0-10v spindle speed control with an ATX power supply that I took from an old computer. The C11G was being powered with a 5v regulated power supply, so I tried using the 5v output from the ATX instead and got the spindle to run, but still crashing after a while. 
After all the testings I presume it is a grounding problem and need help solving this. 

Does anyone experienced this ?
I've read somethings about ground loop but I don't know much of electrical theory. Can someone explain me what it is, how it occurs and what should I do to avoid it?
Which is the best way to ground everything?
I've disabled the mechanical limit switches because I think they were making things worse. Is there a way to ground or shield them against noise?
Does anyone know if a wrong wiring of the UVW inputs on the VFD could cause noise issues?

Please someone help me! I really need to get my machine to work. 


General Mach Discussion / Spindle speed fine tuning
« on: October 19, 2011, 05:04:42 PM »
Hi everyone,

Today I finally got the C11G analog output to "talk" to the VFD, but I still need some help with spindle speed fine tuning.
I've followed the steps of the support doc available in the forum and got a good result on the high rpm settings, but accuracy gets bad as I low the rpm...
If I give a max speed command, I get 10,03V at the output, which makes the VFD to run at 400Hz, but if I command half the speed I get 197Hz when it should be 200Hz and that difference get bigger as a low the speed. If I set the speed at 10% of max I get 35Hz instead of 40Hz, and in this case, the difference is about 300 rpm.
So, the linearity is kind of OK but a little displaced at its botton.
I wish to know if is there a way to fine tune this.

Can anyone help me with this?

By the way, I'm using a KL-2200 spindle with the KL-VFD22 (Huanyang VFD), C11G bob, SS, G320X drivers.
Here is a picture of the components pre-assembled for testing and configuring:

SmoothStepper USB / Help! Servo turns CW only with SS
« on: October 03, 2011, 05:57:24 PM »
Hi everyone,

I just bought a SS last week and hooked up one servo today to test it. I`m using a C11G bob, G320x drivers and now the SS.
I`ve connected everything and tunned as a X axis, but no matter wich direction I jog, the servo only spins CW. I press the left arrow and it spins CW, I press the right arrow and it spins CW anyway...

Can anyone help me?

I`ve tested the C11G bob without the SS once and it worked ok, although not so smooth.


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