Turntable problem

[PopsiclePete]

So, I haven't touched my stringing machine since, august of last year.

I bring out and want to string, however, the turntable does not rotate. I've put some wd-40 on that and it improved slightly.

I'm currently using a Mutual Power 7700 standup. Does anyone have any suggestions on how to get it going again?

[PopsiclePete]

put some more wd-40 and it's going smoother, but still not spinning freely..hmmm, take it apart and lube it up?

[kwun]

not sure how the MP7700 is constructed. does the turntable rotate over a bearing?

it is hard to imagine a bearing would sieze up within 2 yrs, esp since Toronto doesn't have a particularly humid climate.

is there a brake?

sounds like a disassembly and re-lube is in order.

do post some pics.

[Andy05]

Yeah same advice as Kwun
Check for a brake
WD-40 turn it as much as possible, then add a little more spray and try to repeat.
If not just take it apart and empty your WD-40 can towards the bearings

Good Luck

[PopsiclePete]

time to take it apart, I took the off the base, turned it upside down and loaded it with wd-40.

There is a break on it and I've loosened it as much as I can, hell, I even "un-screwed" the pin.

By the way, it's nice to be back playing badminton and visiting this forum. I missed you crazy lot haha

[kwun]

so there is no ball or needle bearing? just metal on metal?

WD40 is ok to use to un-seize as well as to clean off anything that has built up over time. however, to lubricate it for long term it might be better to apply some grease instead.

[PopsiclePete]

just good old-fashioned metal, but I can't seem to get into the rotator housing to wipe the gunk off, I've unloaded as much as I could with the wd-40 but beyond that I'm lost.

thanks for the kwun & Andy

[Mark A]

My PP Pilot turntable bearing is the same: metal on metal. I cleaned both mating surfaces with a toothbrush and rubbing acohol, then dumped some PTFE and "gooey" bearing grease in. Spins around too fast now, if anything.

If you can, replace that metal washer with a plastic one (as narrow as possible).

[kwun]

My PP Pilot turntable bearing is the same: metal on metal. I cleaned both mating surfaces with a toothbrush and rubbing acohol, then dumped some PTFE and "gooey" bearing grease in. Spins around too fast now, if anything.

If you can, replace that metal washer with a plastic one (as narrow as possible).

i have the same problem with my ASE. being so smooth means that it probably has ball bearing inside. the problem is that it is too loose. the table oscillates on tension sometimes and i don't get enough stability during weaving.

[Andy05]

My PP Pilot turntable bearing is the same: metal on metal. I cleaned both mating surfaces with a toothbrush and rubbing acohol, then dumped some PTFE and "gooey" bearing grease in. Spins around too fast now, if anything.

If you can, replace that metal washer with a plastic one (as narrow as possible).

Rubbing alcohol, great shout!
I've been going through a few cleaning products to give my machine a full deep clean and I hadn't thought of that.

[kwun]

alternatively you can use degreaser. i got a bottle from bike cleaning and it worked really well on my gripper.

[Mark A]

i have the same problem with my ASE. being so smooth means that it probably has ball bearing inside. the problem is that it is too loose. the table oscillates on tension sometimes and i don't get enough stability during weaving.

Judging by Noah's videos, it's also a problem on the Gammas. Seems we want to have our cake and eat it - easy to spin, but behaves itself when weaving and tensioning. I always make sure my turntable is aligned properly before commiting to a pull!

[kwun]

Judging by Noah's videos, it's also a problem on the Gammas. Seems we want to have our cake and eat it - easy to spin, but behaves itself when weaving and tensioning. I always make sure my turntable is aligned properly before commiting to a pull!

i always wonder if we can make a stringing machine that knows what is going on and react accordingly.

if it knows that it is not tensioning, then loosen the turntable bearing.

heck, why not motorize the turntable, it should know which string we are working on. rotate the turntable to the right spot, we just need to put the string on the gripper and engage it.

is that taking away too much of the skill/fun of stringing?

[Mark A]

heck, why not motorize the turntable, it should know which string we are working on. rotate the turntable to the right spot, we just need to put the string on the gripper and engage it.

Don't give Yonex any ideas, Kwun...

If I still had my electrical engineering hat on, I'd have a crack at a motion-actuated electronic brake (then sell it to the highest bidder).

[Mark A]

O/P, you can also soak the relevant parts overnight in engine degreaser (having just dumped my mountain bike chain in a tub of the stuff reminded me about it).

[PopsiclePete]

I bought a de-greaser, wd-40, lubricant. It works when I take it apart, but then when I put it back together it seems to be sticky. I will try rubbing alcohol and luby grease.

Thanks Mark! I'll get back to you guys later.

[PopsiclePete]

so I bought some lithium white grease, slightly bit thicker and it seems to work too well haha

Now the whole shaft has shifted into the whole peace...I need to lift it but that's not the hard part.

Anyone have other suggestions?