Messages

1

Third party software and hardware support forums. / Re: suddenly will not stop stepping

« on: October 26, 2015, 07:11:45 PM »

I have switched the motors over and the output pins from mach3 so I have X and Y up and running for 2D projects with manual Z; can't for the life of me figure out what's going on with it.

2

Third party software and hardware support forums. / Re: suddenly will not stop stepping

« on: October 26, 2015, 07:30:50 AM »

I have tried disconnecting all the other inputs/outputs in case something was picking up interference and no change.

At this point I'm fairly confident there must be noise coming through from the control interface; no idea how to tackle that really.

I'm going to get access into where the DB25 cable terminates and hook up a scope there... maybe I will see steps coming through to confirm it's noise or whatever coming from the pc.

Assuming it's coming from the pc maybe just ground that pin as it comes in? I mean it that stops it constantly stepping at least I know where the problem is.

Anything I can do software site to test for this kind of thing?

Thanks again

3

Third party software and hardware support forums. / Re: suddenly will not stop stepping

« on: October 25, 2015, 04:44:29 PM »

When I plug a different motor into that output and same result.

4

Third party software and hardware support forums. / Re: suddenly will not stop stepping

« on: October 25, 2015, 03:17:36 PM »

How can I do that? Do I have to cut the p/port cable and cross the wires over then tell mach3 to use different output pins?

Thanks

5

Third party software and hardware support forums. / suddenly will not stop stepping

« on: October 23, 2015, 04:46:32 PM »

I know similar things have been posted and resolved but I can't seem to get any of the solutions to work.

My very much home made three axis router has been running fine; I cut a three hour job on it last week running mach3 via parallel port no problem. But then yesterday it started stepping the y axis any time that it's enabled. The stepping is not smooth it's like there's 50hz interference on the step pin or something. So I switched the last few cables on the machine over to shielded ones and no change. I soldered on a new driver chip for that axis and no change. I hooked up a scope to the incomming signals for parallel port and I can't see steps coming through.

Pulling my hair out here can't figure out how it's happening.

Interestingly if I have the pc off and pull the enable pins up then all the motors are engaged but static not randomly stepping.

Weird that something like this just started happening half way through a job running.

Any help much appreciated, thanks

6

General Mach Discussion / Re: Dirty jittery movement on one axis

« on: November 10, 2013, 01:57:20 PM »

I did look at the slave axis option, even looked at options to drive two three axis boards from one port. But in the end it was easier and cheaper to get a board that provided enough amps for pairs of motors.

Where should I be looking in the technical data; I must be missing something?

This makes it look easy:
http://youtu.be/Vs2IN45eqAo

A

7

General Mach Discussion / Re: Dirty jittery movement on one axis

« on: November 10, 2013, 12:42:27 PM »

Could you tell me why it's considered bad practice? I had plenty of motors and I figured that double the motors would be double the torque? Plus I have a 22,000rpm router as my cutter so I'm just using the slide on that for my z axis and it needs the two pressure points to keep it nice and straight.

I'm petty sure it's a TB given the choice of TA or TB so I will order one of them; thanks.

A

8

General Mach Discussion / Re: Dirty jittery movement on one axis

« on: November 10, 2013, 10:31:12 AM »

The board says hyu68.com on it and it's a three axis board. I can get a picture later if it helps.

Thanks for your help, A

9

General Mach Discussion / Re: Dirty jittery movement on one axis

« on: November 09, 2013, 02:26:37 PM »

Well, I have just swapped two of the IC's over (on a quite badly designed board I might add) and you hit the nail on the head; the problem moved to the other axis so pretty damn sure that it's that IC now!

Question is, what is the part number and where can I get one?

Thanks again

10

General Mach Discussion / Re: Dirty jittery movement on one axis

« on: November 09, 2013, 01:24:45 PM »

Just had a thought, could I just swap two of them over and see if the problem moved to another axis?