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Messages - jimthefish

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161
General Mach Discussion / Re: Limit switch activated "triggered"
« on: February 09, 2013, 10:13:01 AM »
Ok set the debounce at 3000 still the same set it a 0 still the same but after 6 stop starts of the spindle the machine is running OK with the debounce set at 0.
Bit of advice please, when I've been looking at the diagnostic video and checking the machine/computer link. the pulse frequency is 25008 the time in int wanders between +5.5 to +4.4 so it appears to be correct, BUT every so often flashes +11 for s split second. So I ried the driver test it tells me the system is excellent after an initial warning the pulse is to high.

162
General Mach Discussion / Re: Limit switch activated "triggered"
« on: February 09, 2013, 09:11:10 AM »
Ok will try and set the debounce at 3000, I don't use coolant and the switches are well protected from swarf but will look at the switches tomorrow. Think I will disconnect them from the BOB and see if the fault still happens as my diagnostic page shows no limit switches activated as the fault happens, its only the error box on the main page of Mach telling me there is a fault.
Jim

163
General Mach Discussion / Re: Limit switch activated "triggered"
« on: February 09, 2013, 08:58:26 AM »
I have it set at 2000 and been that since I converted the machine what do you suggest I set it too Tweakie. Jim

164
General Mach Discussion / Limit switch activated "triggered"
« on: February 09, 2013, 07:28:33 AM »
Any suggestions would be welcome. My converted to Mach3, Denford Triac has developed a fault. When I start up after a day's break the first few times I start a program it stops saying "Limit Switch Activated". I reset and the program again and it goes a little further then stops again. After a few false starts the machine will run all day without any problems. Even if I MDI just the spindle to run at say 1000RPM after about 20 seconds I still get the limit switch fault, even though the slides are not moving.
Things I have done.
Checked all connectors for loose screws and wires
Looked at the diagnostic page and it shows no limit switch activated, I just have pin 4 with a green light "This has been normal ever since I converted the machine"
Checked the computers outputs and they all fall within all the parameters on Mach's setup videos.

Just for reference this machine had a few teething problems but lots of help from Hood has performed perfectly for 3 year. I did replace the computer a few weeks ago but found out it was only the internal power supply at fault, so I replace the power supply so the machine is running with the original Dell computer it has had since its conversion.

My next step is to disconnect all the limit switches from the BOB but before I do has anyone any suggestions. I suspect I have a faulty limit switch but as they difficult to get at though I would ask first.
Jim

165
General Mach Discussion / Re: unwanted creep in jog mode?
« on: January 24, 2013, 03:37:15 PM »
Just a thought, I had problems with my spindle creeping (see changing computers) it was down to some software on the secondhand computer I bought sending a signal down the printer line. Apart from your Chinese pendant (I use one) have you any software recently installed that could be sending a signal down the X axis config pin. Jim

166
General Mach Discussion / Re: Changing computers
« on: January 23, 2013, 10:40:31 AM »
OK Hood and Angel-Tec, explain this! I bought my secondhand computer off the internet, not that I'm tight but didn't want the hassle of 64 bit (well I am a bit tight when it comes to money). The computer came with loads of programs on it and it had obviously been linked to other computers in an office or school.
I was confused because this creep problem only started when I connected the new computer to my machine. I accidental left the power to my machine on from the last time I was messing with it, so it was still on when I pressed the on button to start the computer. As I pressed the button the spindle started even before I had called Mach3.
That got me thinking is there a signal going down the printer port? As I mentioned there were loads of programs on the hard drive so decided to dump them all as the computer was only going to run Mach3. I dumped AVG software, Kodak printer and photo suite, loads of little files like spybot whatever that is, plus countless interface files. Well touch wood been using the CNC milling for the past hour and the creeping spindle has gone. Could it have been one of the software programs I have deleted that was sending a signal down the parallel printer port connection? That 2.2v signal has disappeared and the spindle has started maintain a constant speed I requested (got a digital rev counter to check the spindle speed). Don't want to speak to soon but I may have solved it, keep you posted. If I have I'm going to write to those guys controlling the Mars Lunar Landing Vehicle and see if they want any help drilling those holes in the Mars landscape.
Hood and Angel-Tec would welcome your thoughts as to if this could have been the problem or was it the fact that I waved a sledge hammer at the spindle earlier in the day. Jim

167
General Mach Discussion / Re: Changing computers
« on: January 23, 2013, 08:05:58 AM »
Its a Denford Triac mill with a Lynx8o spindle drive board. I repaced all the electronics except for the spindle drive board which was fitted to the machine in 1988, so due for an upgrade as it looks as if its seen better days.  Got and electronics engineer mate coming later in the week as I have just noticed a slight burn mark on the terminal that receives the 0-10v signal. and got a 2.2v signal on it when the spindle is creeping. That's the limit of my electronics knowledge. Will send xml as soon as he's had a look. Jim

168
General Mach Discussion / Re: Changing computers
« on: January 23, 2013, 06:47:56 AM »
OK I can live with the creep of the spindle but if anyone has any ideas of what causes it please let me know.
Here's the facts
I have not changed any of the machines wiring from the BOB.
spindle on works fine (M3)
dial in spindle speeds works fine (S1000)
spindle stop works fine the spindle actually stops but  then about half a second later it start rotating at about 30RPM
Not changed any of the ports and pins from my old set up

I have observed the following
If I turn of the computer off before the machine the spindle stops creeping
If I turn off the machine from the mains and leave the computer on obviously the spindle stops, but when I restart the machine the spindle creeps again.
Occasionally the spindle will actually stop but after a 20 seconds the machine starts to buzz and the spindle starts creeping
The spindle occasionally works perfectly for 10mins then the buzzing starts and the spindle creeps.
I always seem to have a green light on pin 4 but not sure if this was on on the old computer.

I have
Shielded all the wires to the motor drive board
Tried every combination on the spindle relay set up

As I mentioned I will live with it but suspect I'm getting a small voltage on the 0-10v signal to the spindle drive card from the BOB spindle drive slot in card. Whats got me whacked is this has only happened when I replace my aging broken Dell 2400 with a newer Dell Otiplex duel core computer. Any suggestions welcome. Jim

169
General Mach Discussion / Re: Moving off the stops
« on: January 22, 2013, 02:44:34 PM »
Cheers Hood

170
General Mach Discussion / Moving off the stops
« on: January 22, 2013, 12:47:41 PM »
Can someone remind me how to set up Mach3 to let you jog off a stop when you have overtravelled?

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