Hello everybody, my xp desktop crashed. Now i've got A Windows 7, 32 bit version and i'm trying to get my cnc router working again.
I have movement but only in one direction. On this forum I read A topic with the same problem, solution was the difference between the old and new parallel port, 5 and 3.3 volts. I changed mine for A 5 volt version today but the problem remains the same.does anybody have ideas how I can fix this?

Jeroen Kingma
Oudebildtzijl, Holland

a first easy step would be,
to check the voltage with a Voltmeter
at the dir pin.
 

Just expanding on what TPS has already said...

You should see approx. 0Volts on a direction pin when jogging in one direction and approx. 5Volts when jogging in the other direction.

Tweakie.

After I pushed. My cnc out of form I disconnected the motors and put Some tape on the shafts. I wish I did that earlyer.
3.6 volts. You where both right!
The port I bought has A universal slot, for 3.3 and 5 volts. The slot in the computer is A long one so I expected it to be 5 volts. Nope!
By running A G-code  the voltage was 4.6 volts so when I jog the motors get powered bij the parallelport and running A G-code by the USB 5 volt connection.

Do I need A other motherboard? Or is there A way to fix this and get 5 volt on the port. The powersupply of the computer is 12 and 5 volts so somewere on the motherboard iTS being redused to 3.5.

After I pushed. My cnc out of form I disconnected the motors and put Some tape on the shafts. I wish I did that earlyer.
3.6 volts. You where both right!
The port I bought has A universal slot, for 3.3 and 5 volts. The slot in the computer is A long one so I expected it to be 5 volts. Nope!
By running A G-code  the voltage was 4.6 volts so when I jog the motors get powered bij the parallelport and running A G-code by the USB 5 volt connection.

Do I need A other motherboard? Or is there A way to fix this and get 5 volt on the port. The powersupply of the computer is 12 and 5 volts so somewere on the motherboard iTS being redused to 3.5.

Sorry i am Overwhelmed with my bad Bavarian English.

@Tweakie, i hope You can "jumpt in"

Thank You

Besides my bad english my iPad also changes my typings in to dutch.

After I pushed. My cnc out of form I disconnected the motors and put Some tape on the shafts. I wish I did that earlyer.
3.6 volts. You where both right!
The port I bought has A universal slot, for 3.3 and 5 volts. The slot in the computer is A long one so I expected it to be 5 volts. Nope!
By running A G-code  the voltage was 4.6 volts so when I jog the motors get powered bij the parallelport and running A G-code by the USB 5 volt connection.

Do I need A other motherboard? Or is there A way to fix this and get 5 volt on the port. The powersupply of the computer is 12 and 5 volts so somewere on the motherboard iTS being redused to 3.5.

Many of the breakout boards will step up the voltages to 5v. If you are just using the p-port on the motherboard then this may be the way to go.

Do I need A other motherboard? Or is there A way to fix this and get 5 volt on the port. The powersupply of the computer is 12 and 5 volts so somewere on the motherboard iTS being redused to 3.5.

My suggestion would be to fit a PCI parallel port card which outputs the required 5 Volts TTL signal.

You can identify if your computer motherboard can provide 5V from the PCI slot and which PCI card you need to buy from the data presented here; http://www.machsupport.com/forum/index.php/topic,34848.0.html

Tweakie.

I did use this post to identify if I had A 5 volt slot and to buy A pci card. It didn't work so far. Tried it with xp and with two other older desktops.
The problem remains the same. I was thinking that maybe The driver for the pci isn't the right one. The pci I bought is A delock.
Specification
• Connector:
    external: 1 x Parallel DB25 female
    internal: 1 x 32-Bit PCI standard 2.1
• Chipset: Moschip
• Data transfer rate up to 1.5 Mb/s
• FIFO: 16 byte
• Automatically selects IRQ and I/O
• Supports PCI IQR sharing
• SPP, PS2, EPP, ECP compatible to IEEE 1284

Use a multimeter to check the voltage on a Direction pin - when jogging in either direction what is the maximum voltage you see ?

Tweakie.