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triac mach3 conversion
« on: May 25, 2013, 06:24:22 AM »
I'm currently converting my triac pnc3, so far I have all 3 axis running, e-stop, and home switches, I have a shuttle prov2 hand wheel working, now am at a lost end whilst trying to link up the spindle drive.
I can get the machine to turn the spindle on/off via M3/M5 command using the spindle relay output, but this is no good as I dont have a separate controller for the speed. I am trying to connect up the step/direction setup but with no joy, and was wondering if anyone has a running setup using the original triac spindle cables, I have a sp4dc board but cant seem to get the correct wiring to the RUN NO/C/NC - DIR NO/C/NC connections, also if the correct setup on the mach 3 screens.

Motor Outputs -
Pin 17 - Step
Pin16 - Run
Pin 14 - Dir
Step/Dir port - 1

Output signals

Output#2 - port 1 pin 16

But not confident motor tuning is setup correctly

Any help would be greatly appreciated

Re: triac mach3 conversion
« Reply #1 on: May 25, 2013, 06:33:00 AM »
Hi I'm running a Triac with the original spindle drive board (LYNX08) thru a BOB and a spindle drive card from an interface slot in the BOB. the big problem is triac's wiring uses a mixture of low voltage and 240 voltage intermingled thru the system, so be careful.  Mines a 1988 model and uses 4 wires to drive the spindle and control the speed. I gave up trying to get it to reverse as Denford had a strange way of doing spindle reverse. I can give you my connections but before I do tell me the spindle drive you are using and the BOB type. Jim
Re: triac mach3 conversion
« Reply #2 on: May 25, 2013, 06:42:12 AM »
Hi Jim,

I had emailed you direct regarding your setup. My spindle drive is a brown and pestel controller, home made BOB, but the connections are the same I have Step/Dir/Run outputs, I think yours is the pc version of the triac, so I think the spindle drive is different but I believe I only require 4 wires to get it running RUN - NO/C and DIR - NO/C, just dont which is relavent to which wire,and also the correct setup in Mach3
Re: triac mach3 conversion
« Reply #3 on: May 25, 2013, 07:11:19 AM »
OK Jason I've attached 5 pictures of my set up. Unfortunately to get at the electronics is difficult so I'm sending 2 in-focus pictures of the boards unconnected and the 2 out of focus show my wiring connections you make the link and finally there is a diagram just a wiring reference for me. ( the text on the one picture is the set up before I rewired it) I'm the worlds worst electronics man so tend to leave well alone when things are working, indeed I converted my machine 3 years ago with the help of Hood and others on the forum and haven't move a thing since except for a couple of electronic noise issues. Sorry can only send 4 attachments that the maximum for the forum, if you want the wiring diagram will send later. Hope this helps 
Re: triac mach3 conversion
« Reply #4 on: May 25, 2013, 09:50:26 AM »
Thankx Jim, it is a little help, but If I'm correct I think your just using a relay output spindle drive, ie input M3 in mach and it switches on the motor, do you have an external control for the speed?. I am after the connection's for step/dir, if you see on your spindle board where you have that one green connecting block with the letters NO,C,NC as if you use step/dir signals there are 2 sets of those blocks RUN (step)-NO/C/NC and DIR(dir)-NO/C/NC, its these connections to a cable that I have coming from the original spindle drive that I cant work out

According to the denford gsm manual these cables represent -


My connections were as follows -

(Bn) 2 spindle on TO Run NO
(R) 3 Spindle on comm TO Run C

(Y) 4 Spindle fwd TO Dir NO
(Gn) 6 Spindle Dirn com TO Dir C

 (V) 7 Spindle 0V TO 0V
(W) 8 Spindle +12V TO V-Out

As I say with these connections and mach3 set to relay output the spindle turned CW, but no speed control.
Except when I changed Mach3 to Use spindle motor output and step/dir control and disable spindlle relays box checked, nothing happened.... unless the wiring is correct and my initial setup in motor tuning is wrong????
Re: triac mach3 conversion
« Reply #5 on: May 25, 2013, 11:28:35 AM »
This is where you've got me Jason, as I said I'm no electronics man mechanical is my skill. I had loads of problems getting my spindle to work, then all of a sudden it worked. again bear with me cause I'm thick when it comes to electronics. I purchase my BOB and spindle card from the same place as you DIYCNC
I read it like this
I have a direct 240  AC volt into my spindle drive board direct from the machines on/off relay which converts the output to the spindle motor to 180v DC. the spindle drive card that is slotted into my BOB has a small relay on it which is activated by the M03 & M05 commands via the normally close contacts on the Lynx unit. the 2 other wires give a variation of 0-12v for the speed into the 0-12v connections again on the lynx drive unit.. So I assume Mach sends a voltage signal via the BOB connection to the spindle card which in turn sends a voltage signal to my LYNX spindle drive to give the correct speed. By the way I ditched all my Denford electronics except for the main power transformer doughnut and the LYNX08 spindle unit so all my electronics are rewired I even had to reconnect the oiler and operators light into my system.
Sorry can't be of anymore help as I've said If i cant see it move I don't understand it.
Re: triac mach3 conversion
« Reply #6 on: May 25, 2013, 12:54:05 PM »
I too am more mechanical, this has been quite a learning curve. :P

I have ditched everything also, so hooking up what is left is a bit of an art, but I'll get there in the end.

Would you be able to copy your settings in mach3 in the motor output section, ie steps per/velocity/acceleration this may be where I am going wrong.
Re: triac mach3 conversion
« Reply #7 on: May 25, 2013, 03:44:05 PM »
Is this any good, I always make a paper copy of my wiring and settings. Jim
Re: triac mach3 conversion
« Reply #8 on: May 25, 2013, 07:09:04 PM »
Thats excellent Jim, thank you. More food for thought