Hello Guest it is January 18, 2020, 05:23:36 PM

Author Topic: motor does not run  (Read 12413 times)

0 Members and 1 Guest are viewing this topic.

motor does not run
« on: July 11, 2009, 12:20:04 PM »
Just starting.  Xylotex board.  Double checked wiring.  Vrefs all 1.86V.  VBB 24.8 V checked.
Set X, Y, and Z for pin 2, 3, 4, 5, 6, 7 Step Dir.  Can't get limit switch ( when switched) to show on Diagnostics.  Motors won' jog, although the position DRO moves when arrows pressed. 
Tried Paralell Port BIOS settings of output only, bidirectional, EPP, and ECP, with no motro action on any.
Can some one point me in a direction?
Thanks,

Offline Hood

*
  •  25,856 25,856
  • Carnoustie, Scotland
    • View Profile
Re: motor does not run
« Reply #1 on: July 11, 2009, 04:06:25 PM »
Correct port address set up?
Hood
Re: motor does not run
« Reply #2 on: July 11, 2009, 04:27:15 PM »
yes, 0x378.  Check same on parellel port in hardware.

Offline Hood

*
  •  25,856 25,856
  • Carnoustie, Scotland
    • View Profile
Re: motor does not run
« Reply #3 on: July 11, 2009, 04:37:23 PM »
Disconnect the  parallel port cable from the computer and put a voltmeter between a Dir pin and a Gnd pin on the computers port then jog that axis, see if the voltage changes between 0v and 5v as you jog one way then the other. If it does then connect the cable up and disconnect the other end and check there.
Hood

Offline Chip

*
  • *
  •  2,056 2,056
  • Gainesville Florida USA
    • View Profile
Re: motor does not run
« Reply #4 on: July 11, 2009, 05:03:55 PM »
Hi, Garhar1

I responded to the same Question in FAQ section, http://www.machsupport.com/forum/index.php/topic,12032.0.html.

Please don't post the same question all over the place.

Thanks, Chip
Re: motor does not run
« Reply #5 on: July 11, 2009, 07:30:12 PM »
Put the question in the wrong spot. 
The jumpers are there.  I checked Sherline 1/2 step mode.  Nothing.
I only have X stepper connected.  I hit Y and Z jog.  X moved in same direction with both  Z up and Z down (pg up and down).
Tried it again with  Sherline 1/2 step mode off, nothing.  Turned on Sherline 1/2 step mode again, now nothing.

Offline Chip

*
  • *
  •  2,056 2,056
  • Gainesville Florida USA
    • View Profile
Re: motor does not run
« Reply #6 on: July 11, 2009, 09:17:15 PM »
Hi, Garhar1

It may be a LowActive setting issue for the one dir only problem, You'd think the MFG's would do a better job with a "link" to Good setup files.

Just use the pin numbers that move the X axis and change them from Z to X axis in Ports & pins.

Hears the Manual I think for your board, Sending a PM message to you.

Chip
Re: motor does not run
« Reply #7 on: July 12, 2009, 10:15:47 AM »
I'm reading 3.42 TO 0 volts on the parallel port out of computer.

                   PIN 2   PIN 3   PIN 4   PIN 5   PIN 6   PIN 7
X-  ARROW LEFT   0.03V   3.42V            
X+  ARROW RIGHT   0.03V   0V            
Y-  ARROW DOWN         0.07V   3.42V      
Y+  ARROW UP         0.07V   0V      
Z-  PAGE DOWN               0.07V   3.42V
Z+  PAGE UP               0.07V   0V
               

Offline Hood

*
  •  25,856 25,856
  • Carnoustie, Scotland
    • View Profile
Re: motor does not run
« Reply #8 on: July 12, 2009, 10:24:34 AM »
Ok so if I am understanding correctly pin 2  pin4 and pin6 toggle between 0v and 3.42 v when you jog each axis one way then the next? If thats correct then that is what you should see presuming you have 2, 4 and 6 set for Dir pins for their respective axis. 3.42 is a bit on the low side and it will depend on the drives whether it is good enough, dont know abiout xylotex.
 Ok try at the other end of the cable now and make sure its going through the cable. If it is then looks like your problem is the low voltage.

Hood
Re: motor does not run
« Reply #9 on: July 21, 2009, 07:31:51 PM »
Chip,
The parallel cable fixed the problem.  So the serial printer null modem cable was the problem.
Now that the motors are moving, I have a new issue: I can not get the program to reset without bypassing the estop and limit switches.  I have 0 volts on the limit switch circuit.  It goes to 5 volts when I open the sircuit (hit the limit switch).  Active low is not checked.  I see the pin LED light (in diognostics) when I open the circuit, but it will not reset.
Any ideas?
Thanks for the help.