Please help - missing steps ... Mach3

[JAZZCNC]

I think that is what I said i.e direction not settled before step.

I didn't read it that way at first but reading again then yes same thing really.!! Time is shortened and next signal comes along before gets chance to complete last thing so something gets dropped at each direction change.! . . . . . I've eaten since then so my brains fired up again. . Lol

[emilvv]

Hello,

THANK YOU for all of You.

Problem is not resolved ... :(

Yesterday i tried with LinuxCNC live DVD . 2.7.

It is easy to try but the problem is the same !

I moved only one ( Y ) axe because I want to fix the problem.

I moved only in one direction .... from Y = 0 to Y = 600 ....

When I moved Y ... after 200 mm ...300 mm I am receiving that motor knock ...

In Linuxcnc - the same situation ... I tried many configurations .... for STEP pulses, driver setup ( I mean microstepping modes ... )

A little bit better on slow speeds ..... and 400 steps per / rev .... but that is not good idea ..

I have to check LPT voltage .. Also will try to drive the drivers by arduino .. to change speed and to prove driver quality ...

Any ideas are welcome ....

Thank you in advance,

Emil

[Clive S]

Well first of all you seem to be jumping all over the place and not concentrating on trying to sort the problem out in a logical way. It is no use just trying random changes. So take it one step at a time giving clear and concise feedback.
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Some good pictures of the machine would help, are you using ball screws or screwed rod etc? You have already been asked to check the pp voltage out put. ie is it 3.3V or 5V but you have not answered. This might just be a simple pp and bob problem.
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Sorry to be a bit harsh. ..Clive

[komatias]

Get an external motion controller. The parallel ports on Acer and Asus motherboards are not great, I have tried both of them and know. If you do not want to afford a motion controller, get a second PCI parallel port and see what you get but chances are you will still be having issues.

Regards

George

[Dragonfly]

When I moved Y ... after 200 mm ...300 mm I am receiving that motor knock ...

Does it happen at different points when you apply different speed or steps per mm?
If at the same point then check the mechanics.