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General Mach Discussion / Re: Can this computer run mach3
« on: February 24, 2017, 01:38:57 AM »
Hi Malcolm,
For an axis to drive in either direction it requires the Direction signal to change state between High and Low.
As was mentioned in an earlier posting some CNC controllers require an LPT output with 5 volt TTL signals and they will not work reliably with 3.3 volt TTL signals.
Because they are cheap to buy, perhaps consider the purchase of a PCI Parallel Port card which has 5 volt TTL outputs (these may be purchased from a CNC supplier such as CNC4PC, etc.) and use that LPT port to drive your CNC controller).
If you attach your <profile>.xml file from your Mach3 folder (copy and rename it to Malcolm.xml befor attaching) I will check your Ports and Pins setup etc. and see if I can find any obvious problems.
Tweakie.
For an axis to drive in either direction it requires the Direction signal to change state between High and Low.
As was mentioned in an earlier posting some CNC controllers require an LPT output with 5 volt TTL signals and they will not work reliably with 3.3 volt TTL signals.
Because they are cheap to buy, perhaps consider the purchase of a PCI Parallel Port card which has 5 volt TTL outputs (these may be purchased from a CNC supplier such as CNC4PC, etc.) and use that LPT port to drive your CNC controller).
If you attach your <profile>.xml file from your Mach3 folder (copy and rename it to Malcolm.xml befor attaching) I will check your Ports and Pins setup etc. and see if I can find any obvious problems.
Tweakie.