[zach540]

Everyone,

I have a G0704 that I've converted to CNC with a C11 and a C3. I've got spindle speed control, spindle on/off, and accurate RPMs to Mach through the stock controller and motor. However... At this time, mainly due to my lack of effort, I haven't found a good way to get a spindle direction control via Mach.

Right now, M3 and M4 both turn the spindle the same direction, and M5 stops the spindle.

Can anyone point me in the right direction on getting the direction set up and working?

Thanks in advance,
Zach

[samuel95_54]

You probably need to go into your setup on the tab Spindle Setup and change the Output of the spindle direction.
Note you will probably need to get a wire from the I/O board to the Spindle Drive
Attachment 289604

[BTP]

^^ What he said. Are you using it to control the stock DC motor control?

[tpks]

How did this work out for you?

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[zach540]

Haven't had a chance to pursue it at this time due to work (night shift).

Yes I am wanting to use it to control the stock DC motor control board with stock motor.

My problem/question is, specifically how to wire the relays to the stock board. I've looked at the C6 to KBIC-120 wiring diagram here, figuring I may be able to gleam some direction from it : http://cnc4pc.com/Tech_Docs/C6R6%20and%20KB120%20V1.pdf

I'm not the best when it comes to wiring, but I can follow a diagram and/or instructions, i.e NC side relay 2 to A1.

Also are the C11 relays sufficent for this purpose, or would a another relay have to be added?

Any guidance/direction on the actual wiring would be greatly appreciated.

Again, thanks in advance,
Zach

[tpks]

I'm not an expert but I only used P1 P2 I1and the I2 on the kb120 board. I can control the spindle in mach3 but I have to turn the power on by the stock switch. Not really a big deal for me.

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[zach540]

Understood, unfortunately the stock G0704 motor control board does not have an I1 and I2, unless they are infact the A and A1.

G0704 motor wiring diagram attached

[hoss2006]

This may help.
Hoss

https://www.youtube.com/watch?v=daxbxahGGd4

[zach540]

Hoss,

I have seen that video, and unless I'm wrong, it doesn't appear you are using the relays at all. So were you able to change spindle rotation direction with that setup? At this point, I've got spindle speed control, spindle on/off, and accurate RPMs to Mach through the stock controller and motor with the C11, just don't have the spindle rotation control set up.

Zach

[hoss2006]

No I didn't use the relays, not much point in making the spindle reverse imo unless for tapping. Instant reversing isn't generally recommended with these boards and even so you'd only be able to use a tension/compression tap holder. For tapping it would make more sense to use a procunier or similar tapping attachment which only needs forward.
Hoss

[zach540]

Hoss,

Main reason I was looking into the reverse was for tapping, but also because I'm of the mentality that I want everything I pay for to work as it's supposed to or better.
Knowing that you say "Instant reversing isn't generally recommended with these boards". Is there a board you'd recommend that would sufficiently handle that task, such as a KBIC-125?
I've seen your list here: Projects
Just wondering if the KBIC-125 will work, since you say "Replace the controller with a KBIC 125 board which the original seems to be copied"

Thanks,
Zach

[hoss2006]

KB have a couple boards designed to be used for "instant" reversing or "relay reversing", the kbic is not one of them.
DC Drives, Variable Speed DC Motor Speed Control
Hoss

[zach540]

Hoss,

Thank you so much for the link and information, after reading/looking through the available options, I'm thinking I'll go with the KBCC-125R.

Again, thank you,
Zach

Edit to add: Correction, I am going with the KBCC-125R, simply because I already ordered it and the HP resistor! :banana:

[zach540]

Knowing now that I will be going with the KBCC-125R, can someone take a look at the attached and tell me if it looks rightish?

Still need to add the wiring to Enable the KBCC.

I do have a question regarding the KBCC and a tach however, I'm using the C3 board to my C11, in the KBCC manual it states the following: "B. Tachometer feedback (DC tachs only). The load regulation of the control can be improved to 1% of set speed over a 50:1 speed range by use of tachometer feedback. Since no provision is made for the tach input on the terminal block, the tach positive connection must be made directly to the B or T terminal on the speed control module. Note: If control is used on a reversing application, the tach wires must also be reversed so that positive (+) is always connected to B or T.

My question is, is the tach necessary/recommended, just seems like a bit of redundancy in my eyes.


Attachment 290556