What would cause this - Pirate4x4.Com : 4x4 and Off-Road Forum

jduck · 06-27-2010, 06:31 PM

This was the only spot in a run of 8 parts that had this rough edge. This was one of 2 identical parts and the other one came out smooth, so I know the drawing was right. I thought possible "dirty" air but the rest of the run was fine (6min program) so I figured it would have happened more times if that was the case. Any idears?

ron678 · 06-27-2010, 10:54 PM

What ever it is, it is consistant/uniform, leads me to think it is an electrical/program problem, seems too regular to be mechanical.

xr8ed · 06-28-2010, 12:35 AM

Do your slats shake/sway at all? I've had the same thing happen before when the table shakes, or rocks back and forth. After a hard switch in directions the part wobbles momentarily. I don't have the issue when cutting from large parts but when using small peices or scrap(smaller than 12x12, and light weight) it happens easier. I usually throw some weights (scrap) on the edge of small peices to help keep them steady.

jduck · 06-28-2010, 03:20 AM

It was a scrap piece of 3/8s, roughly 10x15. The slats do shake from time to time so that may be it.

jimcolt · 06-28-2010, 06:51 AM

If you had more than one part with this issue.....on the same location and in the same direction....then slat shake is likely. A slug of moisture in the air can do something similar....but would be random.

Jim

jduck · 06-28-2010, 07:22 AM

This was the only piece out of the run that had the ripples. Possibly water but idoubt it, I cleared the 3 filters before the run. I'm guessing it was the soars but it strange it didn't shake when it cut the second piece like this one

TorchmateSupport · 06-28-2010, 07:57 AM

Looking at how the ripples suddenly stop rather than fade to a smooth cut I would look more at something being caught then releasing.

Say for example the torch lead was stuck on the edge of the table. The motors struggle to pull it and you get the ripples; once the torch releases from the snag it runs smooth.

This is not to say that a wobble in the slats could have caused the problem but it may not be the only reason something like this can be caused.

-Jack

ron678 · 06-28-2010, 08:45 AM

Seems like a relay or valve that controls the air is fluttering, opening a little more air then it should have then stabilizing, if such a thing is possible?

bullydogcj · 06-28-2010, 04:02 PM

Were your bearings rolling free?
Where was the pierce point?

jduck · 06-28-2010, 04:23 PM

Quote:

Originally Posted by bullydogcj

Were your bearings rolling free?
Where was the pierce point?

The bearings were not free, I had an issue with that a little while back and that was the first thing I checked. The pierce was at the corner of the arc that would be on the left side of the pic.

HardcorewannabeXJ · 06-28-2010, 04:38 PM

A cut deviation that large should be noticeable while watching the program run. I would run the same program in a dry run to see if you can tell what's happening at that point in the program.

sadisticiron · 07-05-2010, 11:24 AM

i have seen that before with my setup. i noticed that when ever it did it, it was caused by a slag ball that attaches to the tip when your cutting. i only see it when im trying to cut to close

06-27-2010, 06:31 PM	#1 (permalink)
jduck Registered User Join Date: Feb 2004 Member # 26935 Location: Athens, GA Posts: 573	What would cause this This was the only spot in a run of 8 parts that had this rough edge. This was one of 2 identical parts and the other one came out smooth, so I know the drawing was right. I thought possible "dirty" air but the rest of the run was fine (6min program) so I figured it would have happened more times if that was the case. Any idears?

06-28-2010, 07:57 AM	#7 (permalink)
TorchmateSupport Lincoln Cutting Join Date: Jan 2010 Member # 152411 Location: Reno NV Posts: 211	Looking at how the ripples suddenly stop rather than fade to a smooth cut I would look more at something being caught then releasing. Say for example the torch lead was stuck on the edge of the table. The motors struggle to pull it and you get the ripples; once the torch releases from the snag it runs smooth. This is not to say that a wobble in the slats could have caused the problem but it may not be the only reason something like this can be caused. -Jack __________________ Torchmate Technical Support - 6 AM to 4 PM PST 866-571-1066 x3 support@torchmate.com

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06-27-2010, 10:54 PM	#2 (permalink)
ron678 Registered User Join Date: Apr 2010 Member # 159031 Location: Alberta Posts: 80	What ever it is, it is consistant/uniform, leads me to think it is an electrical/program problem, seems too regular to be mechanical.

06-28-2010, 12:35 AM	#3 (permalink)
xr8ed Registered User Join Date: Jan 2007 Member # 84965 Location: Edgewood, WA Posts: 540	Do your slats shake/sway at all? I've had the same thing happen before when the table shakes, or rocks back and forth. After a hard switch in directions the part wobbles momentarily. I don't have the issue when cutting from large parts but when using small peices or scrap(smaller than 12x12, and light weight) it happens easier. I usually throw some weights (scrap) on the edge of small peices to help keep them steady.

06-28-2010, 03:20 AM	#4 (permalink)
jduck Registered User Join Date: Feb 2004 Member # 26935 Location: Athens, GA Posts: 573	It was a scrap piece of 3/8s, roughly 10x15. The slats do shake from time to time so that may be it.

06-28-2010, 06:51 AM	#5 (permalink)
jimcolt Rock God Join Date: Nov 2009 Member # 145912 Location: New Hampshire Posts: 1,255	If you had more than one part with this issue.....on the same location and in the same direction....then slat shake is likely. A slug of moisture in the air can do something similar....but would be random. Jim

06-28-2010, 07:22 AM	#6 (permalink)
jduck Registered User Join Date: Feb 2004 Member # 26935 Location: Athens, GA Posts: 573	This was the only piece out of the run that had the ripples. Possibly water but idoubt it, I cleared the 3 filters before the run. I'm guessing it was the soars but it strange it didn't shake when it cut the second piece like this one

06-28-2010, 08:45 AM	#8 (permalink)
ron678 Registered User Join Date: Apr 2010 Member # 159031 Location: Alberta Posts: 80	Seems like a relay or valve that controls the air is fluttering, opening a little more air then it should have then stabilizing, if such a thing is possible?

06-28-2010, 04:02 PM	#9 (permalink)
bullydogcj Registered User Join Date: Jan 2008 Member # 106846 Location: Narrows VA Posts: 136	Were your bearings rolling free? Where was the pierce point?

06-28-2010, 04:38 PM	#11 (permalink)
HardcorewannabeXJ Registered User Join Date: Jan 2007 Member # 84593 Location: Reno, NV Posts: 3,004	A cut deviation that large should be noticeable while watching the program run. I would run the same program in a dry run to see if you can tell what's happening at that point in the program.

07-05-2010, 11:24 AM	#12 (permalink)
sadisticiron Registered User Join Date: Feb 2009 Member # 129733 Location: Hesperia, CA Posts: 52	i have seen that before with my setup. i noticed that when ever it did it, it was caused by a slag ball that attaches to the tip when your cutting. i only see it when im trying to cut to close