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fishtailing. help?

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dm239

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I had my cam, idler, and string (with peep, button, and D-loop) replaced recently, detailed here:

http://www.tndeer.com/tndeertalk/ubbthr ... ost2483996

my bow is now fishtailing to the left, kinda bad at 15 yards, and very bad at 30 yards:

eMbTl.jpg


I moved the sight (Whisker Biscuit) to the left, and all it did was move the point of impact leftward, still fishtailed.

Any thoughts?

Details:
Mathews Reezen
6.5" brace height
28" length
66# weight
 
GOOD lord!!!! you are getting alot of fletching contact or whoever replaced it just slapped it on there!! You would think they would have checked the tune afterwards. What shop you take it to?? I might want to go the other way!! lol. well at least you will get a good quartering shot!!! LOL :(
 
titansfan2104 said:
GOOD lord!!!! you are getting alot of fletching contact or whoever replaced it just slapped it on there!! You would think they would have checked the tune afterwards. What shop you take it to?? I might want to go the other way!! lol. well at least you will get a good quartering shot!!! LOL :(
Click to expand...

It was Archery Den. Guess I'm headed back tomorrow. I may have to retract my positive statements about them lately.
 
You would think he would check the bow for tune after doing a job like that!! this goes back to the other thread i guess!! looks pretty consistent on your arrows flight, but let someone else shoot it to rule out shooter error/form issues!!
 
I am guessing you just mixed up your words because you said you moved your sight left but called it a whisker biscuit. I am assuming you meant you moved the rest. If so, how much did you move it? I would check my center shot and try moving the rest farther left if possible.
 
To begin with, is your arrow the correct spine? Not that it would cause this issue, but it will have an affect on the ability of getting it in tune. Those should be the 340's.

These specs are from Bob at the Mathews' tech department I obtained several years ago and they are the "standard" setup on the newer Mathews bows and they should be set extremely close to these specs if he set it up correctly. First, measure your axle to axle�it should be 32" and then measure your brace height, which obviously for you will be 6.5. Secondly, check the timing hole in the cam�the string HAS TO be completely centered in the timing window. If it is not centered then the string will either not be bottomed out, or it will be over-extended�there is no margin with that cam for the cam to be properly timed. Then, check for idler lean- lay an arrow against the bow-arm side of the idler, it should run parallel down the string and be 1/8th of an inch above the string at the nocking point. After that, make sure the arrow is centered against the berger hole on the riser cutout. Then take a tape measure and measure from the riser to the center of the arrow�it should be between 13/16ths and 11/16ths. Then finally check your nocking point�it should be 1/4" above the 90 degree mark when using a bow square. Like I said, these are starting points but often they are almost dead-on as long as everything else is within spec. I would measure all of this yourself before you take it back to him so you have an idea of what is wrong and DO NOT let him deviate from Mathews' own guidelines because obviously he has already done that with his "eyeball" I bet! If you have any problems measuring then PM me and I'll give you my number so I can walk you through it.

Best of luck to ya!
 
TNDeerGuy said:
To begin with, is your arrow the correct spine? Not that it would cause this issue, but it will have an affect on the ability of getting it in tune. Those should be the 340's.

These specs are from Bob at the Mathews' tech department I obtained several years ago and they are the "standard" setup on the newer Mathews bows and they should be set extremely close to these specs if he set it up correctly. First, measure your axle to axle�it should be 32" and then measure your brace height, which obviously for you will 6.5. Secondly, check the timing hole in the cam�the string HAS TO be completely centered in the timing window. If it is not centered then the string will either not be bottomed out, or it will be over-extended�there is no margin with that cam for the cam to be properly timed. Then, check for idler lean- lay an arrow against the bow-arm side of the idler, it should run parallel down the string and be 1/8th of an inch above the string at the nocking point. After that, make sure the arrow is centered against the berger hole on the riser cutout. Then take a tape measure and measure from the riser to the center of the arrow�it should be between 13/16ths and 11/16ths. Then finally check your nocking point�it should be 1/4" above the 90 degree mark when using a bow square. Like I said, these are starting points but often they are almost dead-on as long as everything else is within spec. I would measure all of this yourself before you take it back to him so you have an idea of what is wrong and DO NOT let him deviate from Mathews' own guidelines because obviously he has already done that with his "eyeball" I bet! If you have any problems measuring then PM me and I'll give you my number so I can walk you through it.

Best of luck to ya!
Click to expand...
:) seems to be pretty good advice!!!
 
dm239 said:
I had my cam, idler, and string (with peep, button, and D-loop) replaced recently, detailed here:

http://www.tndeer.com/tndeertalk/ubbthr ... ost2483996

my bow is now fishtailing to the left, kinda bad at 15 yards, and very bad at 30 yards:

eMbTl.jpg


I moved the sight (Whisker Biscuit) to the left, and all it did was move the point of impact leftward, still fishtailed.

Any thoughts?

Details:
Mathews Reezen
6.5" brace height
28" length
66# weight
Click to expand...

Question: did you knock those missing vanes off those arrows that are in the target?? Looks kinda odd since it doesn't appear you stacked your arrows close enough to have knocked the fletching off. Plus if you are having such severe fishtailing I'm surprised those shafts missing some fletching hit even remotely close to the others. Am I missing something?
 
TheAirMan said:
I am guessing you just mixed up your words because you said you moved your sight left but called it a whisker biscuit. I am assuming you meant you moved the rest. If so, how much did you move it? I would check my center shot and try moving the rest farther left if possible.
Click to expand...

You're correct- I moved the rest- enough to move my point of impact left by 10 inches
 
I will start here in the morning.

TNDeerGuy said:
To begin with, is your arrow the correct spine? Not that it would cause this issue, but it will have an affect on the ability of getting it in tune. Those should be the 340's.

These specs are from Bob at the Mathews' tech department I obtained several years ago and they are the "standard" setup on the newer Mathews bows and they should be set extremely close to these specs if he set it up correctly. First, measure your axle to axle�it should be 32" and then measure your brace height, which obviously for you will be 6.5. Secondly, check the timing hole in the cam�the string HAS TO be completely centered in the timing window. If it is not centered then the string will either not be bottomed out, or it will be over-extended�there is no margin with that cam for the cam to be properly timed. Then, check for idler lean- lay an arrow against the bow-arm side of the idler, it should run parallel down the string and be 1/8th of an inch above the string at the nocking point. After that, make sure the arrow is centered against the berger hole on the riser cutout. Then take a tape measure and measure from the riser to the center of the arrow�it should be between 13/16ths and 11/16ths. Then finally check your nocking point�it should be 1/4" above the 90 degree mark when using a bow square. Like I said, these are starting points but often they are almost dead-on as long as everything else is within spec. I would measure all of this yourself before you take it back to him so you have an idea of what is wrong and DO NOT let him deviate from Mathews' own guidelines because obviously he has already done that with his "eyeball" I bet! If you have any problems measuring then PM me and I'll give you my number so I can walk you through it.

Best of luck to ya!
Click to expand...
 
My practice arrows, I guess. They've been missing for a while and group fine now and before component replacement.

UTGrad said:
dm239 said:
I had my cam, idler, and string (with peep, button, and D-loop) replaced recently, detailed here:

http://www.tndeer.com/tndeertalk/ubbthr ... ost2483996

my bow is now fishtailing to the left, kinda bad at 15 yards, and very bad at 30 yards:

eMbTl.jpg


I moved the sight (Whisker Biscuit) to the left, and all it did was move the point of impact leftward, still fishtailed.

Any thoughts?

Details:
Mathews Reezen
6.5" brace height
28" length
66# weight
Click to expand...

Question: did you knock those missing vanes off those arrows that are in the target?? Looks kinda odd since it doesn't appear you stacked your arrows close enough to have knocked the fletching off. Plus if you are having such severe fishtailing I'm surprised those shafts missing some fletching hit even remotely close to the others. Am I missing something?
Click to expand...
 
I'm new to the whisker biscuit as of this week (previously shooting NAP's 360 contender to the biscuit), but for me, shooting 2 fletching arrrows, or fletchings with any tears in them, creates extremely erratic arrow flight out of the biscuit. That's clearly not your problem here, but thought it'd be worth sharing.
 
This morning, I swapped out the arrows for brand-new 340 Easton Epic ST's with new fletchings, and I still see the issue. There is no difference between the Rage practice heads versus the field tips.

this morning:

CE89d.jpg
 
dm239 said:
This morning, I swapped out the arrows for brand-new 340 Easton Epic ST's with new fletchings, and I still see the issue. There is no difference between the Rage practice heads versus the field tips.

this morning:

CE89d.jpg
Click to expand...

Have you checked all of the measurements and related items and what were they?
 
TNDeerGuy said:
dm239 said:
This morning, I swapped out the arrows for brand-new 340 Easton Epic ST's with new fletchings, and I still see the issue. There is no difference between the Rage practice heads versus the field tips.

this morning:

http://i.imgur.com/CE89d.jpg[IMG] [/quote]

Have you checked all of the measurements and related items and what were they? [/quote]

That's next on my list.
Click to expand...
Click to expand...
 
With that much movement it should be obvious. That's the good part. Idler lean is where I would look. I always had good luck starting with a 11/16" centershot from the riser to center of arrow with Mathew's bows.
Good Luck.
 

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