DRUMMERWORLD OFFICIAL DISCUSSION FORUM   

Go Back   DRUMMERWORLD OFFICIAL DISCUSSION FORUM > Drum Gear > Other Gear

Other Gear Discuss Hardware and all other equipment not covered in the other topics

Reply
 
Thread Tools
  #1  
Old 02-03-2011, 02:01 AM
wsabol's Avatar
wsabol wsabol is offline
Gold Member
 
Join Date: Jan 2011
Location: Houston, TX
Posts: 1,398
Default YESS Mount placement

Hey guys,
If any of you guys have Yamaha's YESS mounts or the YESS II's, I'd greatly appreciate it if you guys could post the depth of the drum and the distance from the bearing edge to the mount interface on the shell.

If that's too much trouble, just take a picture of the drum and post it so I can measure it myself on the screen.

Thanks!!!!

Last edited by wsabol; 02-03-2011 at 04:02 AM.
Reply With Quote
  #2  
Old 02-03-2011, 02:19 AM
alparrott's Avatar
alparrott alparrott is offline
Platinum Member
 
Join Date: Jul 2009
Location: Wenatchee, WA
Posts: 4,177
Default Re: YESS Mount placement

It's going to vary depending on the depth and diameter of the drum... for what shell size?
__________________
Al Parrott
"Jus suum cuique"
-------------------------------------------------------
Reply With Quote
  #3  
Old 02-03-2011, 04:01 AM
wsabol's Avatar
wsabol wsabol is offline
Gold Member
 
Join Date: Jan 2011
Location: Houston, TX
Posts: 1,398
Default Re: YESS Mount placement

I'm almost positive it will only depend on depth, but you are welcome to convince me otherwise. It's conceptually the same as the position of the chords on xylophone/marimba keys. They are placed so that the chord runs through the nodal point of the vibrating key, so that the natural vibration is unimpeded. If you think of a cross section through the depth of the drum shell, from edge to edge, the YESS II mounts perform the same function as the chords mentioned above.

I'm need this information because I'm building my own custom set, and I want YESS II mounts. You can't buy them from Yamaha without also buying a drum ($$$$), so I have to design my own. I've done some calcs, and I know where the marimba key chords are placed, but I would like to verify what I've speculated with the actual product.

I've Googled YESS mount images, and tried to measure them on screen, but the camera angles are always funny, and I can't get consistent measurements..
Reply With Quote
  #4  
Old 02-03-2011, 04:07 AM
wsabol's Avatar
wsabol wsabol is offline
Gold Member
 
Join Date: Jan 2011
Location: Houston, TX
Posts: 1,398
Default Re: YESS Mount placement

But to answer your question, I only need it for a 12" tom.
Reply With Quote
  #5  
Old 02-03-2011, 04:17 AM
alparrott's Avatar
alparrott alparrott is offline
Platinum Member
 
Join Date: Jul 2009
Location: Wenatchee, WA
Posts: 4,177
Default Re: YESS Mount placement

I only have mine on my 16"x14", so let's do fractions and percentages. The mount is 2.25 inches from the top bearing edge. That makes it approximately 16.07 percent of the distance to the bottom bearing edge. So multiply your drum depth by .1607 for each drum to work out the nodal point.
__________________
Al Parrott
"Jus suum cuique"
-------------------------------------------------------
Reply With Quote
  #6  
Old 02-03-2011, 04:43 AM
audiotech
Guest
 
Posts: n/a
Default Re: YESS Mount placement

I have no set distance. It all depends where I want the toms in terms of easy reach placement. I did measure them and the 8" shell is 4" from the mounts adjustment, the 10" is 4 1/2" and the 12" shell is 4" from the shell"s mount adjustment.





Dennis
Reply With Quote
  #7  
Old 02-03-2011, 05:12 AM
wsabol's Avatar
wsabol wsabol is offline
Gold Member
 
Join Date: Jan 2011
Location: Houston, TX
Posts: 1,398
Default Re: YESS Mount placement

I'm talking about the actual interface between the shell and the mount. Yamaha prescribed those numbers, and I want to copy it. I'm not talking about your personal tom placement on the tom arm.
__________________
"Lay the backbeat home."
-Donny Hathaway
Reply With Quote
  #8  
Old 02-03-2011, 06:13 AM
audiotech
Guest
 
Posts: n/a
Default Re: YESS Mount placement

If you're talking about the actual tom mounting bracket that's attached to the toms, it's about 15/16" from the shell to the outside of the tom mount.

Dennis
Reply With Quote
  #9  
Old 02-03-2011, 09:25 PM
Les Ismore's Avatar
Les Ismore Les Ismore is offline
Platinum Member
 
Join Date: Jul 2006
Location: Location, Location!
Posts: 3,909
Default Re: YESS Mount placement

Your 'nodal point' is going to be on line with with your lug hole, if you have two lug holes, its in the middle.





.........
Reply With Quote
  #10  
Old 02-03-2011, 09:55 PM
Big Foot's Avatar
Big Foot Big Foot is offline
Silver Member
 
Join Date: Nov 2008
Location: QC
Posts: 739
Default Re: YESS Mount placement

on my 12" Yamaha Oak custom the center line of the yess mount screws holes are about 1 1/2" from the bearing edge (give or take a 1/16")
With these lugs, the holes are about 3/4" above the lug screw.

(On the 14" FT, in terms of the distance from the lug screw it's maybe 1" and 2" from the bearing edge.)


Re. what Les said, That would be the case w/ these lugs but they have 1 screw and a false screw in the lug that goes 1/2 way into the shell but not drilled through.
That would put the YESS screw right between these 2 points.

Last edited by Big Foot; 02-03-2011 at 10:10 PM.
Reply With Quote
  #11  
Old 02-03-2011, 10:29 PM
Les Ismore's Avatar
Les Ismore Les Ismore is offline
Platinum Member
 
Join Date: Jul 2006
Location: Location, Location!
Posts: 3,909
Default Re: YESS Mount placement

... so did YAMAHA (others) do vibration testing to find the 'nodal point(s)' on their shells, or is it a basic mathematical formulae?

If your shell is not to YAMAHA specs, can you assume it will have a slightly different nodal point?

How much will 1/8" either way affect sound/vibration(s)?
Reply With Quote
  #12  
Old 02-03-2011, 11:26 PM
wsabol's Avatar
wsabol wsabol is offline
Gold Member
 
Join Date: Jan 2011
Location: Houston, TX
Posts: 1,398
Default Re: YESS Mount placement

Quote:
Originally Posted by Les Ismore View Post
How much will 1/8" either way affect sound/vibration(s)?
Go home. Grab a knife that all made of metal. Pitch (not too tighly) in the center of the knife's handle. Tap it on the counter. Hear it resonate?! Now pitch it where ever else you like. It won't resonate as much, or it will at a much high pitch.

Object in free vibration have specific nodal points that don't move. So grabbing, pitching, or screwing something into them shouldn't affect the vibration.

For an ideal, free floating, vibrating beam, these nodal points are 1/4 the length from the edge. So there is one at 25% and one at 75% the length. This is true in marimba keys.

However, in drum shells the motive force isn't omnipresent. The shells is specifically excited at the ends (the bearing edges). So the nodal points may shift.
__________________
"Lay the backbeat home."
-Donny Hathaway
Reply With Quote
  #13  
Old 02-03-2011, 11:28 PM
wsabol's Avatar
wsabol wsabol is offline
Gold Member
 
Join Date: Jan 2011
Location: Houston, TX
Posts: 1,398
Default Re: YESS Mount placement

Quote:
Originally Posted by Les Ismore View Post
Your 'nodal point' is going to be on line with with your lug hole, if you have two lug holes, its in the middle.





.........
No. not necessarily. Drum companies position there lugs so that they fit a standard tension rod length, not to the nodal point of the drum. The nodal point of the shell is specific to the length of the shell. It not wherever you want it to be.
__________________
"Lay the backbeat home."
-Donny Hathaway
Reply With Quote
  #14  
Old 02-04-2011, 12:56 AM
Big Foot's Avatar
Big Foot Big Foot is offline
Silver Member
 
Join Date: Nov 2008
Location: QC
Posts: 739
Default Re: YESS Mount placement

Quote:
Originally Posted by wsabol View Post
No. not necessarily. Drum companies position there lugs so that they fit a standard tension rod length, not to the nodal point of the drum. The nodal point of the shell is specific to the length of the shell. It not wherever you want it to be.
but in the case of my 12" & 14" yamies the YESS bolts land pretty much in line w/ the lug - coincident? - I dunno. besides yamaha would spec and length bolt that was required pretty much the same cost to them.

But imo, 1/8" of an inch, plus or minus, isn't going to be audibly noticeable anyone.
Reply With Quote
  #15  
Old 02-04-2011, 07:25 PM
Les Ismore's Avatar
Les Ismore Les Ismore is offline
Platinum Member
 
Join Date: Jul 2006
Location: Location, Location!
Posts: 3,909
Default Re: YESS Mount placement

No. not necessarily. Drum companies position there lugs so that they fit a standard tension rod length, not to the nodal point of the drum.

Might be the case for a home builder though not a company like YAMAHA, their designs are not dependent on 'standard' drum parts.

If a company/builder has identified the nodal point of their shell, they're simply going to mount both the lugs and the tom brackets on the same line.

So your lug holes should be on your nodal point line, along with your tom bracket holes if the design of the bracket permits.
Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are Off
[IMG] code is On
HTML code is Off




All times are GMT +2. The time now is 10:00 AM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Bernhard Castiglioni's DRUMMERWORLD.com