dhPotter Posted November 6, 2014 Report Share Posted November 6, 2014 On a Brent C, when centering 3 pounds or more, there is a knocking noise, thunk, thunk, thunk. It does this also when spreading clay out to throw a plate. On some DVD's of professional potters I hear that noise. What is it? - loose bat? - loose bearing? Thank You all for a wonderful Forum. Link to comment Share on other sites More sharing options...
neilestrick Posted November 7, 2014 Report Share Posted November 7, 2014 Could be: 1. Bat pins loose on the wheel- tighten the wing nuts. 2. Loose bat pin holes in the bat- try another bat 3. Bad belt on the wheel 4. Loose bearing on the wheel Link to comment Share on other sites More sharing options...
Foxden Posted November 7, 2014 Report Share Posted November 7, 2014 Try throwing clay directly on the wheel head, if it clunks it is your wheel, i.e., belt, bearings, etc. if it doesn't it is your bats. Usually enlarged holes on the bats will slip back and forth, especially when centering causing the sound. I often jam some clay around the pins to fill the pin holes on the bat and hold those old bats stable, or put some slip under the bat to keep it stuck. Link to comment Share on other sites More sharing options...
Crusty Posted November 7, 2014 Report Share Posted November 7, 2014 put a couple small clay balls opposite your pins under your bat, sounds like you might have a high pin and when it gets pressured, it slaps the wheel head.., ?? worth a shot - good luck Link to comment Share on other sites More sharing options...
clay lover Posted November 7, 2014 Report Share Posted November 7, 2014 Didn't I read somewhere here someone recommending using , rubber bands? or ???? around the pins if the bat holes are worn? I have a bat system, with a square for smaller inserts to go in and the holes on the base have worn. so I'm interested in this. Link to comment Share on other sites More sharing options...
potterbeth Posted November 7, 2014 Report Share Posted November 7, 2014 I've also had this happen when the splash pan was pushed too far off center... Link to comment Share on other sites More sharing options...
neilestrick Posted November 7, 2014 Report Share Posted November 7, 2014 Didn't I read somewhere here someone recommending using , rubber bands? or ???? around the pins if the bat holes are worn? I have a bat system, with a square for smaller inserts to go in and the holes on the base have worn. so I'm interested in this. I would just drill new holes. Link to comment Share on other sites More sharing options...
dhPotter Posted November 7, 2014 Author Report Share Posted November 7, 2014 Thank You for the suggestions. Will check out the wing nuts, and will throw directly on the wheel to narrow it down. Link to comment Share on other sites More sharing options...
Tristan TDH Posted November 8, 2014 Report Share Posted November 8, 2014 And no one see the obvious answer here? a poltergeist inhabiting your wheel. Link to comment Share on other sites More sharing options...
clay lover Posted November 8, 2014 Report Share Posted November 8, 2014 Geeze, why didn't I think of drilling new holes? I love it when the best answer is the most simple. Link to comment Share on other sites More sharing options...
alabama Posted November 12, 2014 Report Share Posted November 12, 2014 And no one see the obvious answer here? a poltergeist inhabiting your wheel. I might believe its a poltergeist in my house since it would explain why my Sears washing machine turns itself on when I'm not there. And then Monday when I returned home a TV that hasn't been on for 3 months - is on.:>( Both dogs have taken a vow of silence. As for the bat that rattles, turn the bat over and examine the holes. One has slits that expands over one pin while the other is slotted to adjust to the slight differences between the pins. Put the bat back on the wheelhead with the slit side on the left then with the right hand push the right side back and forth. The noise should be on the slotted side because that pin holder is not slit. Be sure to examine the bat pins, also. After several years the metal pins wear. Combined wear between the plastic bats and metal pins the knocking you hear would be excessive. If you replace pins, you should know that there are 1/4" standard sizes and 7 and 8 mm metric. When the art dept. at a college replaced their bat pins, apparently they were metric since all of a sudden we were having to hammer the bats on and pry them off. Tall vessels did not fair well when the bats they were on were suddenly pryed off, especially when only one pin was replaced. You could use a one inch piece of paper napkin over the pin, but if it ever gets lost, it winds up in the clay scraps. You might try mixing some 2 - part epoxy to coat the sides to take up the extra play on that one pin hole. Coat one side of the pin hole and test. Coat the other side and test again. Each plastic bat has two corner pin holes that fit a 9 inch or 10 inch bat pins. If all the bats got so worn they couldn't be saved, then drilling holes to fit one or the other size would give you all new bats since those bat pin holes were never used before. Filling in the pin holes with clay works but the grit temper really causes the bat holes to wear out faster. The rattling noise of a loose bat is mostly mental, but then, we can always blame it to why the last coffee cups collapsed or why the bowls are oval. ;>) Good luck, Alabama Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.