My Sharks broken? Help!!!! - Router Forums
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post #1 of 28 (permalink) Old 04-19-2009, 03:55 PM Thread Starter
 
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Unhappy My Sharks broken? Help!!!!

Hi,

Just purchased a CNC Shark Pro from Rockler in the States, and it seems to be broken? it just seems to jam sometimes on the X axis and then start cutting the right pattern, but in the wrong place when it travels back? Just ruined an electric guitar body, and the though of switchin it on again scares the hell out of me. Any ideas?
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post #2 of 28 (permalink) Old 04-19-2009, 05:04 PM
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Quote:
Originally Posted by krayon View Post
Hi,

Just purchased a CNC Shark Pro from Rockler in the States, and it seems to be broken? it just seems to jam sometimes on the X axis and then start cutting the right pattern, but in the wrong place when it travels back? Just ruined an electric guitar body, and the though of switchin it on again scares the hell out of me. Any ideas?
Scratch that... you did say it was the PRO. So I would assume you are talking about the axis that the entire gantry runs along (lead screw under the table)? In which case, there are a number of possible issues. Though the unit may be defective, there are a number of things that you should check. The first would be debris on either the linear bearing rails, or the lead screws. Any type of debris could cause a hang up in the system that the small motors cannot overcome. You could also check for misalignment which could cause the same type of hang up in the system. Then you should also make sure that all of the drive/guide components are properly lubricated.

The symptoms of your machine sound like you are having a problem that is inherent to underpowered stepper motors. My initial thought is that the unit isn't broken. There are other things that could be happening, but I would start with those things, just to rule out something simple. Hope this helps.


Last edited by blurrycustoms; 04-19-2009 at 05:16 PM.
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post #3 of 28 (permalink) Old 04-19-2009, 07:27 PM
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Blurrycustoms, if it is the weaker stepper motors would reducing the depth of cut and increasing passes fix the problem?
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post #4 of 28 (permalink) Old 04-19-2009, 07:36 PM
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I couldn't tell from the initial post, but if the "jamming" occurred during the cut, then yes, a light cut may also be a solution. We would need more details. Also, if the jamming occurred during the cut, you may try a smaller tool, make sure the tool is very sharp, etc, to reduce the force required by the motors.

From the reviews I have read on that machine, they don't seem to have a problem with the steppers during normal operation, so I would assume first the something is causing a hang up in the drive system. Again, more details would also help to diagnose.


Last edited by blurrycustoms; 04-19-2009 at 07:42 PM.
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post #5 of 28 (permalink) Old 04-20-2009, 01:02 AM
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post #6 of 28 (permalink) Old 04-20-2009, 03:30 AM Thread Starter
 
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Hi guys,

thanks very much for all the suggestions. Sorry if i was a little vague in details....

The router is jamming whilst moving from one area of a cut to another and whilst cutting material, so i dont think its to do with the depth of our passes, it even jammed once when doing a 2 mil pass in foam!!!! It seems to be jamming on the threaded bar moving the router left to right on the gantry, not the rails under the bed itself. The threaded bar sometimes seems to vibrate up and down(makes a funny noise, and wobbles up and down, as if it were slightly out of line, but im not sure how to check? Also, the machine is brand new, and although some of the pieces we have cut have caused a lot of debris, we have always been on hand to vacuum it off the tracks and threads every half hour or so. Should this be sufficient for clearing any debris?

Thanks again.
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post #7 of 28 (permalink) Old 04-20-2009, 03:36 AM Thread Starter
 
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Trying to add photos of the damage, hope this works.
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post #8 of 28 (permalink) Old 04-20-2009, 10:27 AM
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Trying to add photos of the damage, hope this works.
Wobbling and vibration is a good indication of some misalignment between your linear rails, and lead screw. If both ends of the lead screw have non-adjustable mounting options, than it may be a manufacturing defect. If you can post some pictures of the lead screws mounts, on each end, that would help to determine if it can be easily realigned.

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post #9 of 28 (permalink) Old 04-20-2009, 10:41 AM
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HI Mike

I'm to sure why you are trying to fix a NEW machine,,I would suggest you call Rockler and ask them what you should do with this dud..

You want it to be right from the get go,it's not your error,I don't think..

I'm almost sure they will say return it and get one more..I know it's a PITA BUT you want it to be right..you should not have that type of error..

I will say the error maybe in the bit you are trying to use,it's not a plunge bit..it maybe jamming the machine..

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Quote:
Originally Posted by krayon View Post
Hi,

Just purchased a CNC Shark Pro from Rockler in the States, and it seems to be broken? it just seems to jam sometimes on the X axis and then start cutting the right pattern, but in the wrong place when it travels back? Just ruined an electric guitar body, and the though of switchin it on again scares the hell out of me. Any ideas?


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Last edited by bobj3; 04-20-2009 at 11:01 AM.
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post #10 of 28 (permalink) Old 04-20-2009, 05:16 PM
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Hi,

Here's a quick link to Rockler's customer service.

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