table height and gripper closure

[partnumber]

today I discovered something new..
lifted table up 1 turn because pins touched cups in respot.
Knew grippers on this lane do not totally close. After table height adjustment, grippers fully close.
Is this beacause the pins have a smaller diameter in this position?

[Mike Stalker]

Re: table height and gripper closure

Hey partnumber, don't go crazy and go across the house making this adjustment.

Your table height should be no less then 5/16 off of the pindeck at BDC (bottom dead center). This is when you use your clevis adjustment.

If the cups are hitting the pins check your table height first. If the table height is good at BDC then you should go through all of your table adjustments to check the yoke adjustment.

[TheGMan143]

Re: table height and gripper closure

It's probably because raising or lowering the table changes the geometry of the spot/respot rods... by shortening the 'throw' of the table, you have effectively lengthened the respot rod a bit.

[John Isbell]

Re: table height and gripper closure

Respotting height and home height is controlled by where you set the table for spotting height. You cannot adjust them independantly.

The most important thing is your machine front end is the proper height off the pindeck, this is 18 7/8" to 19" from the pindeck to the bottom of the machine frame, the pindeck must be level first.

If this is correct, and your table height at BDC spotting is 5/16" + 1/8"-0, you should be OK with the height at BDC respot, if cups are still hitting pins, check the adjustment of the toe bolt on the 7 pin front yoke leg.

Hope this helps!

John

[maister]

Re: table height and gripper closure

I agree with above, if cups hit tops of pins on respot, try moving table back and then re-doing yoke adjustments. You will then have to move pins forward to spot correctly and by doing so, they lie flatter when coming down to pick up pins and do not hit the tops.
the height John Isbell mentions is 19 1/8" for 82/70 or 82/90 with aluminium tables and original frames. If the pinspotters are 82/90 with steel tables they usually have the new thinner frames and the height is as he says 18 7/8" -19" max.
maister

[mefixalane]

Re: table height and gripper closure

If have to raise or lower your table you always want to check you spot and respot rod adjustemts..Feliz Dia

[Fish Bowl]

Re: table height and gripper closure

John I am confused I thought in class you and the work book said 18-3/4" to 19" from pindeck to frame for 82/70 with aluminium table. I was just getting ready to lower a 19" machine to 18-3/4" to stop occasional double shuttle. Will I be wasting my time?

[John Isbell]

Re: table height and gripper closure

Hi new guy (Jere?)

All machines are slightly different, going from 19" to 18-3/4" probably won't make much difference on a double shuttle problem, drop the back of your shuttle a little more than the guage height, see what that does for you.

18 3/4" to 19" was the specifacation used for many years and in many AMF install manuals, we have since found through many synthetic lane installs and machine repositioning jobs that 19" is pretty much the sweet spot for all machines +/- 1/8".

Remember, the class and workbook is always evolving.

Give ma a call, I'll be in Florida next week.

John

[Fish Bowl]

Re: table height and gripper closure

Thanks John you are correct I am Jere.The GM position now has evolved to me being the only mechanic with connections to some pros in Ft. Lauderdale, who I get used parts and lane refinshing, that will answer questions when I need help.I already lowered one machine to help for spotting but it did not work as well as planned.
I am going to check the scribe line next....(should have checked it first)
I'll call you next week.
Thanks the class has made it possible for me to keep it all together, just got to keep learning.

[John Isbell]

Re: table height and gripper closure

Jere,

If you want to attend the spotting session again when I am at Clearwater in August, you are welcome to attend.

Students are always welcome to come back for some refreshers.

John