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technoob10
10-10-2010, 03:39 PM
So recently whenever i string, my gripper seems to always slip, and this makes me kind of scared that im gonna break the string. As a result, when i tension the string, i do it very slowly, like really slow, making it take forever to finish one string job. Do you guys have any tips for me to overcome my fear? Thanks

Another problem i had on my last string job was that when i tensioned a string the grommet (i put in new grommets) was getting pulled out with it, any idea on how to deal with this?
Thanks again

Also i use a dropweight.

airman88
10-10-2010, 04:01 PM
Sell it and get a used lockout machine.

rich s
10-10-2010, 04:22 PM
So recently whenever i string, my gripper seems to always slip, and this makes me kind of scared that im gonna break the string. As a result, when i tension the string, i do it very slowly, like really slow, making it take forever to finish one string job. Do you guys have any tips for me to overcome my fear? Thanks

Another problem i had on my last string job was that when i tensioned a string the grommet (i put in new grommets) was getting pulled out with it, any idea on how to deal with this?
Thanks again

Also i use a dropweight.

first off... ignore airman88.

The issue with the grommet is common with new grommets. You can put your thumb on the section of grommet to hold it in place when you apply tension or you can use the end of the handle of your stringing plyers to hold it in place when you pull tension. Then when you clamp off the string and there isn't any pressure on the grommet you push it the remaining amount back in the hole with the end of the pliers or your finger... then proceed as normal to complete the string job.

on your dropweight.... do you have drum or linear gripper? what brand and model stringer do you have?

if you have a linear gripper you can adjust the travel of the jaw to increase or decrease the amount of force the gripper will apply on the string.

if you have a drum gripper you might try wrapping the string around the drum twice before slipping it into the slot.

most importantly, if your string was bought used, clean the gripping surfaces on the gripper (regardless of whether it is linear or drum) with some rubbing alcohol and a tooth brush.

Irvin
10-11-2010, 02:52 AM
'rich s' had some good point but in addition clean the gripper and think about getting a flare-it tool (http://tiny.cc/wziao). When you flare the grommet they will not come out like that.

Irvin

technoob10
10-14-2010, 08:25 PM
Thanks for all the help. I did clean the gripper with a tooth brush with alcohol but it still happens from time to time. Is there anything else I can do?

beernutz
10-15-2010, 06:32 AM
Which stringing machine do you own? Does is have a linear or a rotational gripper?

technoob10
10-15-2010, 08:07 AM
I use an Alpha String Pal, linear gripper and with flying clamps

Kevo
10-15-2010, 08:36 AM
A linear gripper like that should rarely slip if properly assembled and clean. It's possible that one of the parts was not cast well and isn't formed properly. If both halves look good, make sure the bolts are tight. If the bolts are not high grade they can stretch over time. They may need to be replaced.

This all assumes that there is not operator error of course. You need to make sure when you first drop the weight that the string is clamped enough so that the gripper is pulled tighter as the weight goes down. You probably know that, but I though I would mention it just in case.

topanlego
10-15-2010, 09:43 AM
I have a string pal and have never had a string slip in the gripper.

Here are a couple tips:

1. Engage the gripper onto the string manually before applying tension. You do this by pushing in the spring loaded plates so that they contact and hold the string.

2. Don't start with the drop weight arm in the UP position when pulling tension. If you start in the down position, you don't have to worry about the amount of slack required. This 2nd tip goes for all drop weights.

I made this video http://www.youtube.com/watch?v=adMW3mARDV4 to show how I tension strings. Notice how my left hand engages the gripper before I raise the weight to apply tension.

technoob10
10-17-2010, 04:59 PM
hey topanlego, i followed your instructions for tensioning strings ever since I bought string pal, so i do give the strings enough slack.

Do you mind taking pictures of how your gripper looks like, i feel like mine looks kind of uneven.

Thanks

topanlego
10-19-2010, 10:12 PM
Here are some pictures of my gripper.

No string:

http://img13.imageshack.us/img13/4715/img1263ol.jpg

String in gripper until tension (actually, I'm just pulling on the string by hand):

http://img168.imageshack.us/img168/4834/img1265m.jpg
http://img638.imageshack.us/img638/2057/img1264s.jpg

technoob10
10-19-2010, 11:27 PM
http://warrenprojects.webs.com/1020100018-01.jpg

http://warrenprojects.webs.com/1020100019-00.jpg

http://warrenprojects.webs.com/1020100018-00.jpg

Hi, so here are pictures of my grippers, is it supposed to be kinda bent like that or should the plates be parallel.

Thanks

technoob10
10-19-2010, 11:28 PM
sorry about the huge pictures guys, kinda new at this

topanlego
10-20-2010, 08:33 AM
Looks like you just need to tighten the 2 bolts that hold your gripper together. It just requires a wrench, I think 10mm. Also, make sure that the set screw, the screw in the little hole on the face of the drum where the gripper is attached, is tight. Use the supplied hex-keys to do that.

Kevo
10-20-2010, 05:05 PM
Yep, I think you need to tighten the bolts as well. If the won't tighten properly, they may be stretched. You can buy new bolts at the hardware store for a buck or two. I've had to replace these on other machines before. Not sure, but I think most manufactures use low grade hardware on the inexpensive machines.

technoob10
10-20-2010, 10:14 PM
I used a wrench to tighten the bolts, so the plates are now parallel again, hopefully that will fix the problem. Thanks for all the help.

struggle
10-21-2010, 06:42 AM
definitely looks like those bolts are way loose.
hopefully they tighten up nicely for you. maybe some locktite is in order.

good luck!

if this was an eagnas machine the bashing would have started long ago.

topanlego
10-21-2010, 09:28 AM
I used a wrench to tighten the bolts, so the plates are now parallel again, hopefully that will fix the problem. Thanks for all the help.

If the bolts are stripped, you should contact Alpha and ask them for replacement ones if you're still under warranty.

The other thing you should do is get some locktite or nail polish and apply them to the thread of the bolts to lock them in. You'll have to loosen the bolts again to do that.

Hopefully that does solve you're problem. I haven't had any problems with the gripper even at higher tensions except for the string slipping in the clamps because they weren't tight enough.