Messages

181

General Mach Discussion / Re: VFD and noise questions

« on: September 01, 2008, 06:59:51 PM »

Well no luck, I installed the locked down version , reloaded my tool change macro and all the setup files . Same problem . With the VFD off , no possibility of stray RF its still doing the same thing .

When I click the spindle button or callout m3 the driver watchdog message will trigger within 10 seconds everytime.
The machine runs fine and everything works as it should when I go over and manualy turn the spindle on with the keypad , mach runs fine and the machine makes perfect parts but the minute an m3 or m4 command is entered the watchdog message pops up and the software goes into estop.

182

General Mach Discussion / Re: VFD and noise questions

« on: September 01, 2008, 10:38:20 AM »

yep, I will load an older version when I get back

183

General Mach Discussion / Re: VFD and noise questions

« on: September 01, 2008, 10:13:15 AM »

I am def starting to think it might be software . I have the pulley setting 1 to 1 , limit 1700 rpm . As long as I call out m3 s800 or less the spindle motor spools up just fine but as soon as I try to jog , callout any moves in the mdi Line or pretty much do anything else on screen I get the watchdog triggered message. When  the m3 command has been entered the mouse moves very slugishly on screen even when the VFD and rotary phase converter are powered down and the watchdog trig message pops up as soon as I type anything in the mdi line.

The machine has been working fine with the rotary conv running , spindle running etc all week , only since I have unchecked the Disable spindle relays box in spindle setup has the problem developed.

I can check the disable spindle dialog box and go back to using the keypad to turn the spindle on and off and everything seems to work fine, even with the conrol wire still in place.

184

General Mach Discussion / Re: VFD and noise questions

« on: September 01, 2008, 09:36:24 AM »

The c11 board is version 5.4   .
I would suspect my wiring scheme but its the exact same on the other machines .

I havent found anything that can be hooked to pin 15 without causing issues except the spindle encoder so I dont use it

185

General Mach Discussion / Re: VFD and noise questions

« on: September 01, 2008, 09:29:47 AM »

I am not sure its the VFD thats the probelm . I rebooted the computer, turned on the power supply to the BOB , and I am getting the same watchdog trigger message as soon as I click the spindle button . This is with the VFD off and before the big rotary phase converter is powered up.

If I open gen config and turn off the watchdog as soon as I press the spindle button on screen the program goes into estop.

186

General Mach Discussion / Re: VFD and noise questions

« on: September 01, 2008, 08:39:37 AM »

Ill look this morning for the revision , everything is properly grounded to a buss bar in the cabinet which is attached to a couple of ground rods via a big bonding strap. Everything else related to this machine is also grounded to the same ground rods, rotary conv , transformer , vfd

187

General Mach Discussion / Re: VFD and noise questions

« on: August 31, 2008, 09:34:12 PM »

Yes thats the only difference , worked perfectly before the control wire

188

General Mach Discussion / Re: VFD and noise questions

« on: August 31, 2008, 09:33:08 PM »

Hi Ray , I have tried it with the sheild grounded at both ends and just one end , at the VFD and in the main cabinet, each in turn , no change.
I am using the C11 board from CNC4PC , same BOB I am using on 3 other machines running VFD .

I have to 10v power supply from the VFD attached to the external power supply input for the analog out on the BOB , The analog out signal 0-10v is attached to the analog input on the VFD . 

There are two dc relays on the c11 BOB , both with NO contacts and a common in , one is triggered by pin 1 the other by pin 16 . The VFD has a 24v power supply for the inputs that choose direction , in the VFD I have the switch set to source inputs and the + from the 24v power supply run to the common in term on the relays and one wire each to the two terminals in the VFD for forward and reverse . I have set the switch to sink and attached the - to the relays, same interference.

M3 is set to output 1, output one is set to trigger pin one , When M3 is called out the relay at pin one is energized and completes the circuit to the VFD to turn clockwise (forward with my rear turret lathe). Which it does until the watchdog trig thing puts the machine in estop.  Reverse is wired similarly to the relay on pin 16 , m4= output2. output2=pin 16 , m4 callout energises the relay at 16 and the spindle turns anti-clockwise until the watch dog triggers estop .

I am pretty sure the BOB to VFD wiring is correct , I have been using the same setup (smaller vfd) on three other machines for quite a while with no problems. I am sure I am just overlooking something simple

189

General Mach Discussion / Re: VFD and noise questions

« on: August 31, 2008, 09:16:19 PM »

Thanks Hood , I just set the debounce at 2000 and 3000 with no luck , also just have the control cable grounded on one end . No luck yet . I am going to pull the control wire thru metal conduit instead of plastic in the morning and see if that helps.

The other thing that might be causing a problem is the cable I am using for the control wire has 4 extra wire that are unused , I just folded them back and tie wrapped them to the cable on each end. Is it possible these are acting as an antenna of sorts picking up stray RF ? 

This is the first one I have done where the VFD is outside the main cabinet , all the others are just a foot or so from my breakout board and are all bonded to the same big grounded mounting plate, I wonder if a big bonding strap between the VFD and the body of the machine might help. The machine , the VFD , Rotary Phase converter, motor and Delta to Wye transformer are all well grounded

190

General Mach Discussion / Re: VFD and noise questions

« on: August 31, 2008, 08:17:04 PM »

the motor wires are not sheilded but they never get anywhere near the breakout boards , any wiring or the cabinet that everything is in . They also didnt seem to cause any problems while i was running it this week turning it on manualy with the key pad. i will try detaching the cable sheild from the ground in the VFD and play with a much higher value for the debounce to see if that helps