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Author Topic: Help getting set up  (Read 16080 times)

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Re: Help getting set up
« Reply #30 on: November 15, 2008, 05:04:22 PM »
Ok, I got the scope out and looked at the wave form on one of my axis (at the printer port) when it was moving. I first tried it with Kcam running to see what the signal should look like. I saw a nice 50% duty cycle waveform with about a 10mS period. I than switched over to Mach 3. With the axis moving in Mach 3 I see a very low duty cycle waveform. The on time is around 5uS and seemed a bit erratic my scope was having a hard time triggering on it. So it looks like my Mach 3 setup is putting out a waveform that is way too fast for my controller or motors to respond to , or the duty cycle (on time) is to short. Any clues to what is wrong?
Thanks

Offline Hood

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Re: Help getting set up
« Reply #31 on: November 15, 2008, 05:06:49 PM »
Try increasing the pulsewidth to 5 or even using Sherline mode.
Hood
Re: Help getting set up
« Reply #32 on: November 15, 2008, 05:27:59 PM »
Ray that is the schematic from the CNC4PC site so if the connections are in a different place from yours its either been changed or its the wrong diagram on his site. As for the E-Stop yes thats true, was thinking of my BOB, it requires a jumper or a NC switch on pin 10 to gnd.
Hood

Hood,

    Once again, I'm an idiot.  Mine is a C11.  Sorry for the confusion.

Regards,
Ray L.
Regards,
Ray L.

Offline Hood

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Re: Help getting set up
« Reply #33 on: November 15, 2008, 05:29:34 PM »
Ray get it wrong another couple of million times and you will be getting close to my standing :)

Hood

Offline Rob27

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Re: Help getting set up
« Reply #34 on: November 15, 2008, 05:42:16 PM »
Does this look right?

Offline Rob27

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Re: Help getting set up
« Reply #35 on: November 15, 2008, 05:47:42 PM »
I did jump pins 10 and 5v on the inputs. Also jumped 5v and pin 13, and motors will still not jog...

Offline Hood

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Re: Help getting set up
« Reply #36 on: November 15, 2008, 05:51:40 PM »
Rob, do you have a voltmeter? If so disconnect the parallel port cable and connect the meterĀ  between pin 3 and pin 25 on the computers port and then jog the X axis one way then the other and see if the meter changes from 0v to 5v. That way we can start to get an idea where the problem lies.
Hood
Re: Help getting set up
« Reply #37 on: November 15, 2008, 05:52:19 PM »
Sherline mode worked!! I looked at the waveform and it it is still a low duty cycle, about 10% but seems to work fine with my controller. It is a very stable frequency now the scope triggers well on it. Were is the pulse width setting? I did not find that. Thanks for all the help. I'll be making chips in no time.

Offline Hood

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Re: Help getting set up
« Reply #38 on: November 15, 2008, 05:53:33 PM »
The pulsewidth is on the motor tuning page.
Good you are going, some drives just require a wider pulse :)

Hood

Offline Rob27

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Re: Help getting set up
« Reply #39 on: November 15, 2008, 06:02:15 PM »
How do I know which is the 3 and which is the 25 pin?