Re: Wire Cloth To Perforated Plate Refit
Tim
By changing to plate you changed the stiffness of the feeder and that shifted the natural frequencies - you could be running now close to one, which is not good.
Attached a procedure to take test cards - send me the results and I will tell you if there is a problem.
Regards
Ziggy
href="mailto:ziggy.gregory@vibfem.com.au">ziggy.gregory@vibfem.com.au
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Some More Tips
TIM: not a big deal.
You basically have changed to overall balance of the machine now and will probably be experiencing some erratic or extra vibration.
If the extra vibration is a result of the wirecloth or media being attached without a buffer rubber beneath it.......could just be RATTLING metal to metal noise.....if things are in fact loose, please TIGHTEN...or they will slap and break the support members below.
will rubber conv belt work as alternative.....YEP.
A PIG in a poke...ya know.
if the stuff you put on is heaver than the stuff you took off....balance may be off.....if the vibrating device CLEAR ALL THE WAY AROUND, ABOVE AND BELOW? no contact with anything, nothing rubbing? Does it hit or bang on startup or esp. SHUTDOWN?
DID u change the RPM at all?
is it CARRYING large chunks of stone in the OPGS now?
Signed..Uncle George........i like that new nic. ■
Observations From Your Pic
Hmmmmmm....interesting pic, looking closer.
- Is all of that water system contraption at all vibrating with the screener box?
- if it is or contacting vibrating screen, this would not be GOOD
- extra vibration would result for sure
- the feed plate setup arrangement looks a tad close or in fact in contact to me....
shouldn't be
just some musings..... ■
Re: Wire Cloth To Perforated Plate Refit
Hello Uncle George.
Somehow I just knew we were related. But don' tell anyone. haha ■
Gary Blenkhorn
President - Bulk Handlng Technology Inc.
Email: garyblenkhorn@gmail.com
Linkedin Profile: http://www.linkedin.com/in/gary-blenkhorn-6286954b
Offering Conveyor Design Services, Conveyor Transfer Design Services and SolidWorks Design Services for equipment layouts.
Re: Wire Cloth To Perforated Plate Refit
Greetings,
Upon doing the stroke test, as per Doctor Ziggy’s instructions, it appeared all four corners were making nice equal little circles about 1/2” in diameter.
Unfortunately, I’m presently very remote and don’t have a scanner to send the data. In the testing process it became clearer that aside from the heavier/ deeper vibration, there didn’t seem to be anything damaging happening. So I went ahead and ran some material. Bottom line, the skid bars work beautifully; big rocks that barely fit into little screener travel through smoothly. While, the smaller material sorts and rinses in between skid bars.
I’m sire Simplicity could use some fine tuning. While checking feed and wash rates, the vibration is just enough to make standing flat footed on platform a little uncomfortable for the ears.
No speed or weight adjustments have been made. The plan was to lift punch plate and install rubber belting to dampen impact on cross members. But since the plate had a slightly concave shape, do to welding, the installation procedure required considerable barring and prying. Once in place though, the plate was tight and everything underneath under compression. There is the possibility that some cross members, specifically near the shaft, are under more compression than the end ones. Cant add the rubber without a few hours of die-grinding new and oblong bolt pattern. Otherwise I would. If you guys insist though? 2” x 3” x “ flat bar pieces used for washers to protect outside of side panels. All grade 8 fasteners.
To date, 200cu/yards test run, no signs of damage to screener, or excessive heat in bearings. Starts and stops are uneventful, just a little v-belt stink at start-up No bangs or rattles at stop. The spray manifold is mounted separately, combined 350 gal/min in hopper, and 350gal/min on screen = 650 to 700 total. And good eye; the feed-plate had not been adjusted at time of picture.
Overall, I’m thoroughly impressed with how the large material slides along over bars and through screener without affecting the stroke. Only wish, I would have though of it.
Thanks again, and good vibration to you all.
P.S. Recent thought, I’ll attempt to post digital pics of stroke test. ■
Tim - Thanks For The Update
Beauty........sounds like it is working nicely, the skid bars work nice to keep the big narly stuff off the finer wirecloth....slide off semi quickly.
the belt thingy you mentioned......stinky situation or whatever....:>)
on that unit, you have a pivoted motor base built by the SIMPLICITY company.
It MUST be setup correctly or you will likely end up with STRETCHED VBELTS, no travel left on your tension plate takeups for the motor base and difficulty starting the unit over the course of a very short period of time.
THE TRICK: you must number one: ensure the BASE PLATE the motor is mounted on is LEVEL and then just turn those NUTS on the 2 vertical rods just down til you ensure the motor mounting plate is basically set at level position. Then, you take the slack up on the VBELTS by using the slider bolts to PULL the motor back until the belts are TIGHT.
What always happens is this: folks tighten down those VERTICAL nuts assuming wrongly that they are used for BELT TENSION...that is WRONG. When you tighten those nuts down you now LOCK the pivot base DOWN....and it is now a hard locked stationary base. So......when MR VIBRATING screen or feeder trys to shutdown that offset exciter weight on the shaft.....it HOPS, JUMPS, POUNDS, AND FREAKS out on the structure for 30 seconds trying to come to a rest. If the pivot base is not pivoting, then the weight of that machine is HOPPING up and DOWN using the VBELTS as the STRETCHhhhhhhhhhhhhhhhhhh point til it stops. When you super stretch those belts, soon they will not tighten anymore and the machine slips on startup and you must eventually replace those belts.
SUMMARY: the pivot motor base MUST BE SETUP CORRECTLY or the above happens, belt slip, trouble starting feeder up and usually we also destroy the pivoted motor base due to HAMMERING it to death.
Nice to hear it is working pretty good. FIND ANY GOOD amounts of GOLD??? ■
Rubber Beneath The Plate
Ahhhhhhh....truly, as long as the plates and bars are COMPRESSED fairly tightly down.....and not hammering.........i would not worry too too much about the rubber inserts.
Catch em next time round. GOOD LUCK.
Wishing you gold in them there hills. ■
Vibration Stuff
Tim, if the stroke checks seemed fairly identical to one another, means the vibrating screen is what we call BALANCED all around.
It is then important to ensure MR STRUCTURE is in fact got enough safety factor in it to NOT VIBRATE when the machine is shaking.....if structure shakes, we may need to throw a few more HANDILY PLACED CROSS BRACE PIECES in it to settle er down. ■
Wire Cloth to Perforated Plate Refit
Hope it’s been a good summer for you all.
Just modified a circle throw Simplicity 2’ x 6’ single deck screener. Swapped 1” wire cloth for perforated plate. Plate is 3\8” thick, with 5/8” x 4” long slotted openings. The plate also has 1” skid bars and 5\8” spacer bars attached. Estimated weight of new plate is 250 to 300 lbs.
Plate is intended to scalp off ” up to occasional 16” rounded slab rock. 600-700 gal/min water between hopper and deck.
Vibration is much more than with wire cloth, even without any material. In other discussions, tracing with a marker was mentioned, but this art form isn’t clear to me yet.
Upon recently reading one of a few of uncle George’s tips, I realise there should be rubber underlying the plate. Holes already drilled and plate was sucked down pretty tight. Probably half a day to re & re. Would strips of conveyor belting do?
Back to main topic, any tips on tracing and forward looking ideas on weight/rpm changes to smooth things out a little.
Thanks all,
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