Mark K
Cave Dweller
Member since April 2012
Posts: 2,600
|
Post by Mark K on Oct 31, 2013 19:10:22 GMT -5
Well, I did two experiments. One was successful.
I think the blade is shot.
I made a oil guard and fed the mushroom by hand the rest of the way and it finally went.
I then cut a chunk of grinding wheel by holding it to the blade. I then decided to cut a fire brick. I made two cuts on the brick and got two wonderful cuts on some hard stuff. I got half way through the third cut when the blade dulled again. The stuff is hard, but not that hard.
I guess I will have to look at a new blade.
Anyone know if I can put the 22 inch MK blade on this saw or if it will not work?
|
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Oct 31, 2013 19:18:02 GMT -5
I may have missed this, but what pulley are you using for your feed rate? That blade has got years of life left in it. Put the belt on the largest pulley and cut a dozen slabs of your fire brick or obsidian, or take a metal file to the blade and expose some new diamond.
|
|
|
Post by johnjsgems on Oct 31, 2013 20:22:44 GMT -5
Yes on slow feed. Yes on dressing blade open. If you feed slow you won't be loading the motor very much. You will also get smooth cuts and longer blade life. I've never heard of a 22" blade. It would not be a lapidary blade for sure.
|
|
|
Post by johnjsgems on Oct 31, 2013 20:28:02 GMT -5
I went back to look at your blade. There will be diamond all through the rim notches so if dressed open it should cut for years. I also just noticed the vise modification. Should work well. The stock vise has just the center bolt so you have to block the right side to keep vise from tilting when clamping a rock in left side only. I guess you can back out the right bolt if cutting something that fills the whole vise.
|
|
Mark K
Cave Dweller
Member since April 2012
Posts: 2,600
|
Post by Mark K on Oct 31, 2013 20:52:02 GMT -5
I am running it on the slowest rate of feed.
You think I should run the brick through a dozen times?
Will do.
Going out there right now.
|
|
Mark K
Cave Dweller
Member since April 2012
Posts: 2,600
|
Post by Mark K on Oct 31, 2013 20:53:06 GMT -5
Just went out and started it up on the brick. I got brick that is for sure. 1000's of them at my disposal.
|
|
Mark K
Cave Dweller
Member since April 2012
Posts: 2,600
|
Post by Mark K on Oct 31, 2013 20:55:57 GMT -5
I went out to the shed an double checked the blade. To my delight, it is a 20 inch.
MK 301 20X75X1
I am a happy dude.
Brand new. Paid $125 for it.
|
|
Mark K
Cave Dweller
Member since April 2012
Posts: 2,600
|
Post by Mark K on Nov 1, 2013 18:34:28 GMT -5
I got tired of fooling around so I put the new blade on. It still cuts out.
I really think it is a power feed issue. I will just have to wire a new dedicated circuit for it.
|
|
|
Post by phil on Nov 1, 2013 22:41:40 GMT -5
I still think your motor is just gotten too old.
|
|
Mark K
Cave Dweller
Member since April 2012
Posts: 2,600
|
Post by Mark K on Nov 2, 2013 5:38:23 GMT -5
Anyone know of a test to see if the motor is the issue?
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,169
|
Post by jamesp on Nov 2, 2013 6:53:02 GMT -5
They do not build them like that anymore.Sweet
|
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Nov 2, 2013 8:14:25 GMT -5
Use a current meter to monitor the motor during the cut, it should pull ~8-10 amps(maybe more) at start up and ~5-7 amps running with minimal load. Monitor the meter through out the cut until it pops the breaker. If you don't have an amp meter you can get one relatively cheap at harbor freight or craigslist. I can run two saws (24 and 18) an my sphere machine on one circuit.
Did you verify that you have all the right pully's and RPM motor? Maybe you are feeding the rock toooo fast.
Good luck,
Tim
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,169
|
Post by jamesp on Nov 2, 2013 8:37:13 GMT -5
Old breakers often need replacement. If one keeps kicking with out being overloaded it is quite common that the breaker is defective instead of the load. If they unplug easy switch it with another and try,
|
|
|
Post by 1dave on Nov 2, 2013 12:56:08 GMT -5
I figured it out. The freezer is on the same circuit. When it kicked in, the breaker would go. Anyway, I had to play with it. You know I did. I cut a chunk of MT Diamond country rock, but it was unremarkable, so I pitched it. Here is a slice of Brenda jasper(or is it agate)that I cut. I found the rock on my last trip. Jasper / agate is in the eye of the beholder. Jaspagate or agatejasper is the exact center.
|
|
|
Post by 1dave on Nov 2, 2013 13:03:47 GMT -5
Well, I though I had it figured out. I am 3/4 of the way through a 7 inch chunk of mushroom and it keeps kicking the breaker. It will rum forever if the feed is not engaged, but once it hits rock, it balks and blows. This house is set up with 15 amp circuits. I don't like it one bit. It is also set up weird as one room will half blow and so will another. I have an idea for an experiment. Electrical code for most parts of the US since about 1955 require lighting circuits to be on 15 amp breakers with #14 awg copper wire (aluminum wire experiment in the 60's was a total disaster!) Outlet circuits on 20 amp breakers and #12 awg, max of 8 outlets per circuit.
|
|
|
Post by 1dave on Nov 2, 2013 13:10:27 GMT -5
Anyone know of a test to see if the motor is the issue? Hang an amprobe meter on the hot wire and see how many amps it is drawing running with and without a load.
|
|
|
Post by Toad on Nov 2, 2013 15:24:11 GMT -5
Quite a monster - and just in time for Halloween!
|
|
|
Post by phil on Nov 2, 2013 17:42:53 GMT -5
Take it to a local electrical shop and have them do a load test. Or, if you're brave, see if you can stop it by hand. Not advised.
|
|
|
Post by 1dave on Nov 2, 2013 19:21:46 GMT -5
Take it to a local electrical shop and have them do a load test. Or, if you're brave, see if you can stop it by hand. Not advised. Easy test: Start a cut, stop it part way through and then re-start the saw. If it binds up it is feeding too fast.
|
|
|
Post by DirtCleaner on Nov 2, 2013 22:41:35 GMT -5
And, this is for everyone, connections can loosen up in wiring. If you have the knowledge to do it safely (IE: shut the whole darn thing down) check all the connections in the box and the outlets as well. Loose connections can get hot and are fire hazards. If a breaker keeps tripping you need to find the answer or don't use it. BTW: breakers don't work as simply as some would think. A 15A breaker can probably take 30A for a number of seconds or even minutes before tripping. They don't just trip if the 15A level hits. Good luck and please report the cause of the problem if you get it figured out.
|
|