jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
|
Post by jamesp on Nov 5, 2017 18:50:46 GMT -5
50% slower than most factory units. Hopefully it will do softer stuff. Running dry road gravel for maiden voyage. Has a couple of types of adjustment.
|
|
|
Post by Jugglerguy on Nov 5, 2017 18:56:23 GMT -5
I assume this was built by you, Jim? Are you going to coat the inside of the barrel with something?
|
|
|
Post by Drummond Island Rocks on Nov 5, 2017 20:50:50 GMT -5
Interesting concept. Hope it works as planned. Rock movement looks good. OSHA may not approve. Some really dangerous spinning parts on that thing.
Chuck
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
|
Post by jamesp on Nov 5, 2017 22:19:47 GMT -5
Interesting concept. Hope it works as planned. Rock movement looks good. OSHA may not approve. Some really dangerous spinning parts on that thing. Chuck Chuck, does your Mini Sonic run really slow ? And have you tried softer stones at lower speed. Or obsidian at slow speed ?
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
|
Post by jamesp on Nov 6, 2017 6:44:49 GMT -5
I assume this was built by you, Jim? Are you going to coat the inside of the barrel with something? Not sure Rob. Must see if it polishes first. It is built to handle modifications and changes. May replace the homemade steel hopper with Mini Sonic barrels. Hard to beat factory made hoppers. That steel hopper could easily be adapted to the Vibrasonic for tumbling larger rocks than the Vibrasonic hopper. In that case I may drop a disposable 6 mil plastic bag in each time.
|
|
|
Post by Drummond Island Rocks on Nov 6, 2017 8:15:55 GMT -5
Interesting concept. Hope it works as planned. Rock movement looks good. OSHA may not approve. Some really dangerous spinning parts on that thing. Chuck Chuck, does your Mini Sonic run really slow ? And have you tried softer stones at lower speed. Or obsidian at slow speed ? The mini sonic is adjustable from fast to almost nothing. I have tried running really slow with pudding stones to try to minimize undercutting but it did not work for that. I have not tried obsidian in the mini sonic because with the loto in the arsenal there really is not a need. There must be something about the internal motion of the viking. The loto is seems to be be able to handle obsidian at full speed without any damage. The only change required for obsidian is a large percentage of ceramic. 50 percent is bare minimum. Stay tuned for photos of a batch of neodymium color changing glass I finished this weekend. Chuck
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
|
Post by jamesp on Nov 6, 2017 8:27:09 GMT -5
Chuck, does your Mini Sonic run really slow ? And have you tried softer stones at lower speed. Or obsidian at slow speed ? The mini sonic is adjustable from fast to almost nothing. I have tried running really slow with pudding stones to try to minimize undercutting but it did not work for that. I have not tried obsidian in the mini sonic because with the loto in the arsenal there really is not a need. There must be something about the internal motion of the viking. The loto is seems to be be able to handle obsidian at full speed without any damage. The only change required for obsidian is a large percentage of ceramic. 50 percent is bare minimum. Stay tuned for photos of a batch of neodymium color changing glass I finished this weekend. Chuck Thanks for the info. That helps. Wish you had run obsidian in the slowed down mini Sonic but understand the Lot-O does it fine. The Viking is a jack hammer lol. I get the 70% ceramic in Lot-O w/obsidian. Looking forward to the nuclear glass Lot-O an enigma. You called my vibe a thing. Yes, not OSHA's favorite safe machine. if it works then guards may be added. I do not like the loose springs on that home made vibe. I think it allows too much travel. Makes Mexican jumping beans on the top of the pile. would like to restrict it to a tighter 'buzzing' action.
|
|
|
Post by Drummond Island Rocks on Nov 6, 2017 8:57:36 GMT -5
The mini sonic is adjustable from fast to almost nothing. I have tried running really slow with pudding stones to try to minimize undercutting but it did not work for that. I have not tried obsidian in the mini sonic because with the loto in the arsenal there really is not a need. There must be something about the internal motion of the viking. The loto is seems to be be able to handle obsidian at full speed without any damage. The only change required for obsidian is a large percentage of ceramic. 50 percent is bare minimum. Stay tuned for photos of a batch of neodymium color changing glass I finished this weekend. Chuck Thanks for the info. That helps. Wish you had run obsidian in the slowed down mini Sonic but understand the Lot-O does it fine. The Viking is a jack hammer lol. I get the 70% ceramic in Lot-O w/obsidian. Looking forward to the nuclear glass Lot-O an enigma. You called my vibe a thing. Yes, not OSHA's favorite safe machine. if it works then guards may be added. I do not like the loose springs on that home made vibe. I think it allows too much travel. Makes Mexican jumping beans on the top of the pile. would like to restrict it to a tighter 'buzzing' action. Was just teasing about the safety stuff. I realize its concept only. That spinning offset weight looked wicked though. My mini sonic is sitting idle at the moment. I could put some of my already polished obsidian in it starting at 120 grit. My only issue is that I would want to run it at full speed and then again at slow speed. Just running it at slow would not tell the whole story. Takes 10 ten days per test. 120/220 for 2 days, 500 for 2 days, 1000 for 2 days and then polish for 4 days. Chuck
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
|
Post by jamesp on Nov 6, 2017 9:10:08 GMT -5
Thanks for the info. That helps. Wish you had run obsidian in the slowed down mini Sonic but understand the Lot-O does it fine. The Viking is a jack hammer lol. I get the 70% ceramic in Lot-O w/obsidian. Looking forward to the nuclear glass Lot-O an enigma. You called my vibe a thing. Yes, not OSHA's favorite safe machine. if it works then guards may be added. I do not like the loose springs on that home made vibe. I think it allows too much travel. Makes Mexican jumping beans on the top of the pile. would like to restrict it to a tighter 'buzzing' action. Was just teasing about the safety stuff. I realize its concept only. That spinning offset weight looked wicked though. My mini sonic is sitting idle at the moment. I could put some of my already polished obsidian in it starting at 120 grit. My only issue is that I would want to run it at full speed and then again at slow speed. Just running it at slow would not tell the whole story. Takes 10 ten days per test. 120/220 for 2 days, 500 for 2 days, 1000 for 2 days and then polish for 4 days. Chuck I guess you could put mostly ceramic in it and run 3-4 already polished obsidians with just Borax to see if it bruises it. If it bruises it then there is no need to use the Sonic. that then runs into a test at lower speed setting. That is how I have been testing lately. find out if the settings bruise polished stones. only to satisfy your curiosity, but I would be interested in outcome
|
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Nov 6, 2017 10:21:47 GMT -5
I wonder if part of the Lot-O success is the soft bowl. Shock absorbing rubber prevents bruising?
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
|
Post by jamesp on Nov 6, 2017 11:00:27 GMT -5
I wonder if part of the Lot-O success is the soft bowl. Shock absorbing rubber prevents bruising? doubt it wish someone would put a vibration analyzer on it and see the waveform and acceleration and displacement. those three will give the best design criteria. I had one where I used to work. Hand held on Ebay for $130
|
|
|
Post by amygdule on Nov 6, 2017 11:30:12 GMT -5
Here's a video of a Mini Sonic which has an adjustable speed control. I speed up the control at about 1:15 in the video. Staring into it for too long will scramble your vision.
|
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Nov 6, 2017 12:32:28 GMT -5
I wonder if part of the Lot-O success is the soft bowl. Shock absorbing rubber prevents bruising? doubt it wish someone would put a vibration analyzer on it and see the waveform and acceleration and displacement. those three will give the best design criteria. I had one where I used to work. Hand held on Ebay for $130 It's just a thought to consider. The loto bowl is very soft. And very successful. Watching your experiments carefully. Still planning a quartz style vibe when time allows.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
|
Post by jamesp on Nov 10, 2017 7:12:01 GMT -5
Here's a video of a Mini Sonic which has an adjustable speed control. I speed up the control at about 1:15 in the video. Staring into it for too long will scramble your vision. I know the 3600 cycle Mini Sonic is adjustable. Not sure if it is adjusting the frequency or the displacement. I do not believe there is a frequency control as that is likely a large and costly piece of electronics. However, displacement is easy to adjust. Can be as simple as a mechanical travel limiter. Reason I mention, 3600 cycles is 3600 cycles. Whether the travel is short or long. Impact forces at 3600 cycles is exponentially increased from say a 1725 cycles. I believe impact force is calculated on the square of the velocity. Basically the acceleration.. Purchased a couple of those Mini Sonic barrels because they have a round hopper. Round has less friction than a donut or Lot-O oval hopper. Hoping to build a vibe that allows rock rotation in the hopper at say 800 to 1200 cycles for softer stone. Thanks for the video. That was the fastest spinning roll I have ever seen in a vibe even if sped 1.15. Small hopper, small mass, friction free round shape.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
|
Post by jamesp on Nov 10, 2017 7:23:10 GMT -5
doubt it wish someone would put a vibration analyzer on it and see the waveform and acceleration and displacement. those three will give the best design criteria. I had one where I used to work. Hand held on Ebay for $130 It's just a thought to consider. The loto bowl is very soft. And very successful. Watching your experiments carefully. Still planning a quartz style vibe when time allows. Do you know if the Lot-O motor is 1725 or 3450 RPM ? Or what speed it is ? what speed do you plan ? Test is glass. If you can vibrate glass against each other without a single bruise you have arrived. Glass is sensitive. After thinking about this vibe thing, I think slower is better. I think I am right. A little fairy in my mind.... Just shot a nice 8 pt, first 10 minutes in woods this year. Formula for impact force, note (velocity) squared
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
|
Post by jamesp on Nov 10, 2017 8:38:28 GMT -5
Here's a video of a Mini Sonic which has an adjustable speed control. I speed up the control at about 1:15 in the video. Staring into it for too long will scramble your vision. Thanks amygdule. Will go look at youtube original
|
|
|
Post by amygdule on Nov 10, 2017 12:48:07 GMT -5
I know the 3600 cycle Mini Sonic is adjustable. Not sure if it is adjusting the frequency or the displacement. I do not believe there is a frequency control as that is likely a large and costly piece of electronics. However, displacement is easy to adjust. Can be as simple as a mechanical travel limiter. Reason I mention, 3600 cycles is 3600 cycles. Whether the travel is short or long. Impact forces at 3600 cycles is exponentially increased from say a 1725 cycles. I believe impact force is calculated on the square of the velocity. Basically the acceleration.. Purchased a couple of those Mini Sonic barrels because they have a round hopper. Round has less friction than a donut or Lot-O oval hopper. Hoping to build a vibe that allows rock rotation in the hopper at say 800 to 1200 cycles for softer stone. Thanks for the video. That was the fastest spinning roll I have ever seen in a vibe even if sped 1.15. Small hopper, small mass, friction free round shape. Out of curiosity I popped the cover of the Mini Sonic. It looks like the variable speed control is just a rheostat that adjusts the power going to the “vibrating coil” that vibrates the barrel. The coil is mounted between the barrel and four springs attached to the base. Here’s a few pictures and a basic description The Vibrating Coil is left center Backside of rheostat speed control. Four lightweight springs at the corners of the vibrating asssembly.
|
|
|
Post by pauls on Nov 10, 2017 14:56:49 GMT -5
Yep the minisonic/vibrasonic just vibrates at whatever frequency your AC power is, just an electromagnet pulling on an armature with the hopper attached at the other end, it works well though.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
|
Post by jamesp on Nov 10, 2017 20:50:27 GMT -5
Yep the minisonic/vibrasonic just vibrates at whatever frequency your AC power is, just an electromagnet pulling on an armature with the hopper attached at the other end, it works well though. Yep. That would be 3600 cycles/minute in USA fixed 3000 cycles/min down under fixed.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,154
|
Post by jamesp on Nov 10, 2017 20:54:57 GMT -5
Double thanks amygdule. I get it now. It would be 60 Hz X 60 sec = 3600/min. Then likely reducing the voltage or basically the power, but not the vibration rate.
|
|