Messages

11

General Mach Discussion / Re: Index Pulse Setup Problems (Lathe)

« on: September 16, 2011, 12:00:12 PM »

MC sry i didnt have time to reply to your post this morning when i replyed to hood.    I will go check the voltage of the blue signal wire when the switch is blocked/unblocked and connected/unconnected from the PP.  no i didnt disconnect the pin from the BOB,i just teed into it infront of the BOB but i will go change that now.  dont think i have any 180 ohm resistors around but i will go get some tomorow and give that a try aswell                                    


regards
simon

12

General Mach Discussion / Re: Index Pulse Setup Problems (Lathe)

« on: September 16, 2011, 04:43:59 AM »

Hood i checked  supply voltage and it is putting out 5v,im getting the 5v from the bufered BOB,i also tried a seprate 5v ps.    after you mentioned  trying a different input i was thinking about it and i think the inputs on my BOB have internal resistors so that simple mecanical switche can be used without pullup resistors. so i put the blue signal wire directly to pin 12 on the parallel port so it wont be affected by the BOB. it made a difference but still isnt right,now when i leave the switch open mach doesnt see any pulses wich i think is correct but when i use a pice of black tape to block the switch mach is reading  bettween about 8000 to 30,000 rpm

regards
simon

13

General Mach Discussion / Re: Index Pulse Setup Problems (Lathe)

« on: September 15, 2011, 04:28:17 AM »

Hood thanx for takeing the time to check the demo version. now i know that the mach settings and the demo version are ok,it must be the hardware side of things. when i get home from work i will check the voltage is giveing 5V. I still have a resistor on the LED side but i will also try a new opto switch just to be sure its not blown. This is a link to a thread i made on the zone showeing how i have it wired up,i suspect it might be wrong.

http://www.cnczone.com/forums/general_electronics_discussion/121343-wiring_optical_interupt_switch_bob.html


regards
Simon

14

General Mach Discussion / Re: Index Pulse Setup Problems (Lathe)

« on: September 14, 2011, 03:54:52 PM »

Yup that was the wrong XML,not sure were that was from.
This is the correct one

I tried removeing the resistor from the sensors + supply wire and it didnt seem to make any diffrnce so im hopeing theres a flaw in this xml or that i just need to buy the licenced version of mach.


regards
Simon

15

General Mach Discussion / Re: Index Pulse Setup Problems (Lathe)

« on: September 14, 2011, 04:06:09 AM »

I will try removeing the resistor from the sensor side tonight, and even if it blows it,i have a few spare ones lieing around.

in the meantime heres the XML 


thanx again for your speedy replys


regards
Simon

16

General Mach Discussion / Re: Index Pulse Setup Problems (Lathe)

« on: September 13, 2011, 05:16:54 PM »

Hood, thanks for your reply,
Im not sure how to send the file it tells me theres already a file with that name, to rename it and try again. but the computer wont accept any new name.

I think it was a post of yours on Zone where i got the idea for the OPB 917 BZ sensor, where you said thats what you were using, and that they work well with mach.
Im using a limiting resistor on the sensor as well as on the LED side, is this correct or should i only be using one on the LED?


Regards,
Simon

17

General Mach Discussion / Index Pulse Setup Problems (Lathe)

« on: September 13, 2011, 04:22:57 PM »

Hi all,
I'm having problems setting up the index pulse and i'm looking for a little help.
Its counting more pulses than it should, maybe about twice as many and is not linear.
I've tried Index Debounce and any value above 0 seems to have the same effect, it shows 135 RPM no matter what my spindle speed is.
I'm using an optical sensor (Optek OPB 917 BZ) with a 60mm diameter disc and one 10mm slot.
I read on this forum that its necessary to enable Spindle Relays even if they are not used, I tried this and it didnt seem to make a difference.
Is it necessary to run Spindle Calibration Test to get the Index Pulse to work properly?
I'm using the Demo version R3.043.022 Lockdown also tried the R3.043.045 Development  but same results.
any advice or help would be much appreciated.


Regards,
Simon