Excalibur 21 Urgent!!!

[Craft Amca]

When I plug the product in, the circuit breaker trips. What could be the reason for this? I replaced the power cables, but the problem persists.

[JTTHECLOCKMAN]

When people come on any forum and they have a problem, what happens is they do not give enough info and then the questions start and it takes awhile to get to the root of the problem. I suggest you give us more info. When you say you plug saw in outlet it trips breaker. What breaker? Is this a GFCI outlet and if so move it to one that is not. Is the saw off when you plug in? It better be. If it trips panel breaker then try a different outlet and or different circuit like in a different room to be sure it is not the outlet causing the problem. But if saw is off and the breaker trips then it is in the cable leading into saw. could be a damaged cable, bad male end of chord. After this we need need more info. if plugged in and does not trip but does when saw is turned on the more than likely the switch has gone bad. Are you using a foot switch and if so what kind. See how far this has gone just from your one line statement.  I also do not know what you mean you replaced the power cables. What does that mean? There is a fuse on those saws and did you check that. 

Man I just looked at your other post about the vibrating saw. My suggestion is to step back and clean that mess up. You can do alot better job of setting that saw up. Take all that foam off and get some plywood and attach to base and then some thick rubber pads or cut pieces off something. they sell them in Home depot. That will help take some vibration out. Make sure the stand is sitting on a solid surface floor and legs are spread properly. I see the cables used and they look way too small and shoddy. Please invest in better electric cables. Also I see you have an aquarium pump as dust remover. I assume the one on the saw does not work. How is this connected to the saw? This can be your problem of tripping breakers if that pump is not working correctly. Any pumps has start up current draw. Again I point to shoddy cables. I am not knocking your set up but you can do better and enjoy the hobby more. 

Edited September 6, 2025 by JTTHECLOCKMAN

[Wichman]

To add to JT's post; is the circuit breaker an Arc Fault Circuit Interrupter ( AFCI ) ? if so the arc from the motor can trip it. 

[OCtoolguy]

That poor saw has lived a hard life.

[Sycamore67]

Sorry but it sounds fatal.  It likely is the motor or control electronics and both are expensive.  Perhaps time for a new saw or look for a used one.

[JTTHECLOCKMAN]

I guess no follow up. Maybe scared him off. 

[rash_powder]

OK.  As others have said very limited info here.  soooo......

If the saw is off and pops the breaker when you plug it in, your fault is between the outlet and the power switch.  I'm going to assume you have a foot pedal.  Those pedals are easy to get crap in, so unplug everything, open it or look in there and be sure nothing foreign is in there.  INSECTS ARE CONDUCTIVE!!!!!  Many problems in my job have been caused by dead bugs on circuit boards shorting things.  

If that foot switch is clear, the next stop is the power switch on the saw.  If you aren't comfortable opening the control box and poking around you are done troubleshooting.  If you are fine with this, get in there and check that switch out, unplugged of course.  If you have a volt meter, check continuity with the switch on and off, but be aware that you may need to disconnect/unsolder the switch from the board to properly test it.  

Should the switch test fine, you are into the circuit board.  First look at it really close.  Are there any burn marks?  If so that component fail, catastrophically.  If no burn marks, smell the board.  If it smells like smoke or that really acrid stink electronics have when the smoke escapes, your board is toast.  You can try repairing it, but without a schematic and proper test equipment its going to be a battle.  Replace it.  

Should all look well with the board, its the motor.  Check that it is free spinning, if it is not, figure out why.  Bearings MAY be replaceable if you are willing to tear the motor apart and can press them in and out.  Brushes may have worn and are binding on the commutator.  Foreign items may have gotten in and shorted commutator contacts.  The stator or rotor coils may have shorted.  Look for burns.  Smell for smoke.  If its bad replace it, you will not find anyone that will rewind it.  

Past the motor, bearings in the arms and foreign objects jamming linkages.  

It may sound rude, but this is all basic troubleshooting.  I know it may not be your thing, but you said you replaced the power cord - which i'm assuming means you unsoldered and resoldered the cord, leading me to believe you are somewhat techy.  

Good luck.  Pics help immensly.  Descriptions better than its broke, whats wrong even more.

[Craft Amca]

There was a problem with the device's card, and I fixed it. Love to those who make empty comments. I'm telling you that the machine isn't getting power and the fuse blew, but you're dismissing it with excuses like “limited information”... Maybe I took you too seriously. The problem is on my end, I apologize.

[Wichman]

23 minutes ago, Craft Amca said:

There was a problem with the device's card, and I fixed it. Love to those who make empty comments. I'm telling you that the machine isn't getting power and the fuse blew, but you're dismissing it with excuses like “limited information”... Maybe I took you too seriously. The problem is on my end, I apologize.

Thanks for coming back and letting us know what the issue was, it may help the next time. 

Please excuse some of the more gruff members here, they mean well but . . .

Please do introduce yourself in the new members section. I would like to know more of what you do.

 

[JTTHECLOCKMAN]

38 minutes ago, Craft Amca said:

There was a problem with the device's card, and I fixed it. Love to those who make empty comments. I'm telling you that the machine isn't getting power and the fuse blew, but you're dismissing it with excuses like “limited information”... Maybe I took you too seriously. The problem is on my end, I apologize.

Easy does it. That one line statement is very limited with info. A saw can have various problems that mimic each other. Being an electrician I seen this many times in the field. Can not pinpoint things with such little info. Glad you fixed it but it is nice to reply and tell us that you did. 

[OCtoolguy]

Hmmm, my car has a rattle somewhere. What's wrong with it? That is about what you said regarding your saw. If there was a problem, it was all in your 1st sentence. We all try our best to help but the person seeking help has to do their part too.

[BadBob]

21 hours ago, rash_powder said:

INSECTS ARE CONDUCTIVE!!!!!

So are lizards, birds, and squirrels.  

[Craft Amca]

On 9/8/2025 at 9:43 PM, Wichman said:

Thanks for coming back and letting us know what the issue was, it may help the next time. 

Please excuse some of the more gruff members here, they mean well but . . .

Please do introduce yourself in the new members section. I would like to know more of what you do.

 

Hi! I’m Uncle Craft. I work with woodcraft and construction projects – I build wooden houses, gazebos, saunas, and staircases.

Besides construction, I also love sharing my craft online. On YouTube and Kick, I stream creative content where I use a scroll saw machine (fret saw) and show different woodcraft techniques in real time.

So, my work is a mix of practical building projects and creative live woodworking content.

[Craft Amca]

1 minute ago, Craft Amca said:

Hi! I’m Uncle Craft. I work with woodcraft and construction projects – I build wooden houses, gazebos, saunas, and staircases.

Besides construction, I also love sharing my craft online. On YouTube and Kick, I stream creative content where I use a scroll saw machine (fret saw) and show different woodcraft techniques in real time.

So, my work is a mix of practical building projects and creative live woodworking content.

In short, I'm not the kind of person who sits around making fun of what's written here or waits to write something just to respond to the forum.

[JTTHECLOCKMAN]

3 hours ago, Craft Amca said:

In short, I'm not the kind of person who sits around making fun of what's written here or waits to write something just to respond to the forum.

I think it is best to leave this here and move on. Glad you found a solution to your problem. I and am sure others wish you alot of luck in your other adventures. Many of us here are scrollers for many years and have used used this platform to educate ourselves as well as help others when called upon. We all have other careers and many times they come into play while answering other questions. many times a topic goes astray abit but this is normal for all web sites including FB. When we come here we choose to participate or just lay out for many reasons. Sometimes and again this happens in all forums but the written word gets misinterpreted which is normal. We all do not talk the same way and that is a good thing. But there is no ill intent here. Sometimes it takes some time to get into the feel of a site. Knowing the players is part of it. Always nice to know a little background on people here. But also remember we pay to play here too. Not like FB. 

So again very happy with your fix and always like to hear this. And whatever you do to help others on your other ventures. Always feels good to repay others with knowledge you gained in some fashion through others.  

[kmmcrafts]

On 9/8/2025 at 2:15 PM, Craft Amca said:

There was a problem with the device's card, and I fixed it. Love to those who make empty comments. I'm telling you that the machine isn't getting power and the fuse blew, but you're dismissing it with excuses like “limited information”... Maybe I took you too seriously. The problem is on my end, I apologize.

Makes me wonder if your circuit board issue is somehow related to the ground issue you had back in May where the plug wasn't grounded and your saw table was charged and shocking you.. Normally there's not a lot of board issues with these saws but I have seen a few, but we never know the situation to those few either.. could be another grounding issue or improper cords etc.. 

[kmmcrafts]

15 hours ago, Craft Amca said:

Hi! I’m Uncle Craft. I work with woodcraft and construction projects – I build wooden houses, gazebos, saunas, and staircases.

Besides construction, I also love sharing my craft online. On YouTube and Kick, I stream creative content where I use a scroll saw machine (fret saw) and show different woodcraft techniques in real time.

So, my work is a mix of practical building projects and creative live woodworking content.

If you don't mind sharing your YouTube channel drop a link to it.. I'm always interested in construction type channels. Maybe I'll learn something from your channel. 

[Garry Brpwine]

Sounds like a load.. You may have something jamming... check the under side look for debris, or missing or misalignment of parts.. Just my 2 cents...   

[JTTHECLOCKMAN]

17 hours ago, Garry Brpwine said:

Sounds like a load.. You may have something jamming... check the under side look for debris, or missing or misalignment of parts.. Just my 2 cents...   

He said he fixed it. Was control board problem. How he fixed he did not say. 

[Craft Amca]

On 9/10/2025 at 4:01 PM, kmmcrafts said:

If you don't mind sharing your YouTube channel drop a link to it.. I'm always interested in construction type channels. Maybe I'll learn something from your channel. 

@UncleCraftsStudio

[Ber Gueda]

On 9/8/2025 at 8:15 PM, Craft Amca said:

Love to those who make empty comments. Maybe I took you too seriously. 

[Craft Amca]

Hello everyone,

I recently repaired my Excalibur EX-21 scroll saw. At first, the machine was tripping the breaker, but after replacing the fuse and checking the wiring, I managed to fix that issue. The motor now runs fine.

However, I am facing a new problem: the lower arm is hitting the underside of the table when the machine operates. It seems like the arm alignment or the eccentric connection might have shifted when I reassembled the motor.

Has anyone experienced this issue before? Could it be caused by a misaligned eccentric, a loose bearing/bushing, or something else in the linkage system? Any advice or guidance would be really appreciated.

Thank you!

[kmmcrafts]

36 minutes ago, Craft Amca said:

Hello everyone,

I recently repaired my Excalibur EX-21 scroll saw. At first, the machine was tripping the breaker, but after replacing the fuse and checking the wiring, I managed to fix that issue. The motor now runs fine.

However, I am facing a new problem: the lower arm is hitting the underside of the table when the machine operates. It seems like the arm alignment or the eccentric connection might have shifted when I reassembled the motor.

Has anyone experienced this issue before? Could it be caused by a misaligned eccentric, a loose bearing/bushing, or something else in the linkage system? Any advice or guidance would be really appreciated.

Thank you!

I'm not sure if this is the problem but I would start off by measuring the distance from the bottom of the upper arm to the saws table top, it should be the same distance from both back to the front... if it's not then adjust the knob on the top at the back of the saw until you get it parallel to the table.. Then I would loosen the bolts on the motor just enough to be able to turn it in the slots.. turn the saw speed all the way down and run it while turning the motor ( with blade installed and tensioned ) and see if it quiets down.. You can place a small machinist square or something with a straight edge on the back side of your blade while doing this and you'll visibly see changes in the forward / rearward movement of the saw blade while turning the motor in the slots. Try adjusting the motor so you have minimal movement in the blade. You may need to remove the motor bolts and move them to different slots to get more adjustment. I suspect the motor alignment is off but you need to also have the table parallel to the upper arm first. I also suspect you're going to need to remove the motor bolts to other slots to get enough rotation to get it adjusted if this is the issue, in fact. you may need to do that a couple times if it's that far out of whack to be hitting the bottom of the table.. I been there once that's how I know this. LOL   Let us know if this makes it better. 

[Craft Amca]

Hi everyone,

 

I adjusted the height to 7 cm from each end (as in the first pic.). But the lower arm in the second pic is still hitting the underside of the table when I start the machine.

[kmmcrafts]

Hmm, I guess I don't have any other suggestions.. I suppose it could be a bad bearing or something.. Did you loosen the motor and try adjusting it after making the arm level to the tabletop like I mentioned in my last comment? 

You could try holding both arms, well hold one and wiggle the other to try to see how much slack is in the bearings but I don't know how to describe how much is too much etc. as they all, even brand new have a slight amount. 

Only other thing I can suggest is maybe you'll have to call Ray or I think Mike is the name of his son at Seyco as they know these saws inside and out. 

I think they have the phone number on their website. Seyco.com

Good luck and let us know if you figure something out.