Messages

11

General Mach Discussion / Re: Help with threading woes in Mach3

« on: June 22, 2018, 09:03:56 AM »

Update!
After removing everything in the system except the index pulse and the breakout board, I was still having this problem.
I decided to reinstall all the system components back to my original setup.  I still had the same problem.
I then reformatted the computer drive and installed XP, the drivers, and Mach3.  Then threading worked perfectly.  I have no idea what was causing the issue, but it's gone now.  WOOT!!!!

12

General Mach Discussion / Re: Help with threading woes in Mach3

« on: June 14, 2018, 10:11:08 AM »

Dale,
Did you ever fix this problem?  I am having the exact same issue.

Mike

13

General Mach Discussion / Threading problem, strange motion, Please help!

« on: June 12, 2018, 05:33:26 PM »

I did read the file you suggested.

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14

General Mach Discussion / Threading problem, strange motion, Please help!

« on: June 12, 2018, 05:32:55 PM »

There's no cut being made. The stepper drives are not powered. Mach only thinks they are moving.  The motor rpm is steady within 2 rpm.

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15

General Mach Discussion / Turn, OD Taper wizard question

« on: June 11, 2018, 09:34:09 PM »

Hello,
Is there a way to get the OD Taper wizard to cut a taper where the larger diameter is on the end of the part? (The tailstock end) I can only seem to make tapers with the small end on the tailstock side of the part.

Thanks,
Mike

16

General Mach Discussion / Re: Threading problem, strange motion, Please help!

« on: June 11, 2018, 07:54:36 PM »

Thanks Rich. What you described is exactly what I did. The video I linked to shows the weird movement Mach is calling. Those strange ZigZag moves.
I will have to try the G32 setting.
Another weird thing it does sometimes is slowing the feed to a crawl.  In threading it has to move fast in the Z to match the pitch, but sometimes maybe even mid-pass, it slows to a snail's pace.

Arturo sent me a video that shows how to check for continuity between the power supply negative terminals and the chassis and ground.  My machine passed that test.

Sigh...

17

General Mach Discussion / Threading problem, strange motion, Please help!

« on: June 11, 2018, 01:20:34 PM »

I assume it's OK to use this BOB for threading. I have read other posts where people successfully used it on lathes with threading.  When I exchanged emails with Arturo at CNC4PC he didn't say it was a problem.

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18

General Mach Discussion / Re: Threading problem, strange motion, Please help!

« on: June 11, 2018, 09:52:47 AM »

- You have backlash enabled and thus there is motion which takes place to implement the backlash.
Suggest you turn backlash  off and see if the strange motion goes away. As far a using backlash relative to
to threading................GET RID / minimize BACKLASH if you want accurate threading.  PERIOD!

I've done all I can to eliminate backlash. The problem I am seeing is there with backlash enabled or disabled.


HMM........ the signal for RPM to Mach for RPM readout is coming from the break out board with the
VFD as the source of the signal. There can only be one signal for rpm readout when threading.
I thought that you changed from using the C3 index board to a Hall affect? So the hall affect should be
used as the single source and you also click the spindle button on to get the RPM readout.

Manualy turn on and manualy set rpm of the  VFD.
I did this too. I had the spindle manually controlled at the VFD set to 400 RPM. The stepper drives and PS were disconnected. The C3 board was disconnected. The C6 board was disconnected.

You don't want two signals fighting each other for the basis of the RPM used in threading!

Just some thoughts,
RICH  

I do wonder if I may have a bad BOB. I hate to keep throwing money down a hole.
I uploaded a video to you-tube. This run is fairly clean, but there are some strange motions being sent by Mach3.
https://youtu.be/RAAVSQNnDMk
The attached image shows some really strange motions.

19

General Mach Discussion / Threading problem, strange motion, Please help!

« on: June 10, 2018, 08:41:47 PM »

In a effort to simplify the troubleshooting, I disconnected the C3 index board and the C6 spindle control. So the only active component is the C10 breakout board. The spindle was turned on at the VFD and held a rock steady 400 rpm. No stepper drives or power supply was active either.  Even with it as bare bones as this, Mach was still making strange moves.
The C10 BOB is new.  Could it be bad? It seems to function just fine with the expecption of threading.

I'm about the throw in the towel and switch to the Centroid Acorn.

Thanks for any help.

Mike

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20

General Mach Discussion / Threading problem, strange motion, Please help!

« on: June 10, 2018, 02:05:26 PM »

Hi,
I tried something new. I use a switching power supply for my steppers.  I thought maybe that was causing electrical noise and interfering with the index signal. I disconnected the power supply to eliminate any noise from the power supply or stepper drives. It still has erratic movements.  They are not as bad as before.
It seems to be a noise issue. I'm just not sure how to isolate the cause or eliminate it.

Do I need to ground the BOB?


Mike

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