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20 Apr 2024 03:38 #298698 by JohnBr00ker
'Test this axis' was created by JohnBr00ker
Having just cleaned a huge insect nest out of my old SuperCam controller box, I've got as far as trying to establish the correct address for the parport.Checking in the Dell bios, it lists 378h, which I entered.Getting as far as 'Test this axis' for the X axis, I got an error pop up as attached (Had to photo the screen).While I still have question marks over various other entries, I'd be grateful if anyone could interpret this for me.Possible extra info - when I turn on the power to the controller, I would have expected there to be a reaction from the steppers, just being activated. Is this so ? Nothing, in my case.Regards John 
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20 Apr 2024 10:55 #298718 by andypugh
Replied by andypugh on topic 'Test this axis'
The very old advice here might help. Or it might not.
forum.linuxcnc.org/16-stepconf-wizard/27...pe-error-in-stepconf

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20 Apr 2024 14:21 #298731 by JohnBr00ker
Replied by JohnBr00ker on topic 'Test this axis'
Thanks Andy - any port in a storm !
John

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29 Apr 2024 18:52 - 29 Apr 2024 18:54 #299333 by JohnBr00ker
Replied by JohnBr00ker on topic 'Test this axis'
I've just had a brain wave - checked the parport mode in the bios, and discovered the default setting for this pc is PS/2.
Now faced with decision - EPP or ECP ?
EPP gives 2 addresses - 378h or 278h ?
ECP gives 3 addresses - 378h, 278h and 3BCh.
In addition, ECP then offers a DMA channel setting - OFF, DMA1 or DMA3

Feel I've opened a can of worms, but may be on the right track !
John

EDIT I've tried EPP with both addresses, but in both case I get the 'Error - broken pipe' pop up.
Last edit: 29 Apr 2024 18:54 by JohnBr00ker. Reason: update

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29 Apr 2024 19:02 #299336 by tommylight
Replied by tommylight on topic 'Test this axis'
Broken pipe is a python error, i think, so has nothing to do with parallel port.
Set it to EPP and 0x378.
Got through stepconfig, enter values as correctly as you can, save the config, start said config and test the machine.
Use the Calibration from the Machine menu to tweak and tune the scale till you get precise distance traveled.

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29 Apr 2024 19:20 #299337 by JohnBr00ker
Replied by JohnBr00ker on topic 'Test this axis'
Many thanks for the quick reply.
1st job after we've eaten !
John
The following user(s) said Thank You: tommylight

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29 Apr 2024 20:22 #299341 by tommylight
Replied by tommylight on topic 'Test this axis'
You are welcomed always.

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03 May 2024 17:57 #299649 by JohnBr00ker
Replied by JohnBr00ker on topic 'Test this axis'

Set it to EPP and 0x378.
Got through stepconfig, enter values as correctly as you can, save the config, start said config and test the machine.
 

A frustrating few days of repeating this, but whatever settings I use, I get to the stage of 'test this axis', and it produces no reaction from the motor. I've also tried the Y and Z axis, with the same result.

I've had the lid off of the controller box, and checked a few voltages, and they seem to be as per wiring diagram.
Not sure where to go next.
I did wonder if there is a way of energizing the controller with external connections onto the parport socket without using the pc output. Some sort of dummy set up ?
I don't want to have to build a new controller, but it may come to that.
John

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03 May 2024 18:37 #299655 by tommylight
Replied by tommylight on topic 'Test this axis'
1 In Stepconf, set pins 1, 14, 16, 17 to "amplifier enable", test an axis
2 if it does not work, save the config and start it as normal, see if that works.
3 If not, edit the config using stepconf and invert all the above pins, test an axis
4 repeat 2

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03 May 2024 20:35 #299671 by JohnBr00ker
Replied by JohnBr00ker on topic 'Test this axis'
Thanks tommylight.
I've done as suggested, but had no luck.
I repeated the compete set, but this time re-booting after each change, but still no result.

A bit more background. I'm using a Dell GX620, specifically bought for this project. The hdd was the original I brought with me from UK, because it had both Ubuntu(8.04) and my download of Linuxcnc(whatever was current in June2013), and that had been used successfully with my original cnc machine loaded on it.

I did wonder if the Dell parport has a different pinout to 'standard'. In the bios, it shows the parport address as 378h, so I wondered if there were other differences !
I have used 0x378, as you suggest earlier, and that got rid of the 'error' window.
Regards
John

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