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Old Roland Jupiter 8 restoration

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Re: Old Roland Jupiter 8 restoration

Postby Sam Spoons » Sat Mar 30, 2019 2:27 pm

JIS screw heads used on many Japanese motorcycles too.
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Re: Old Roland Jupiter 8 restoration

Postby DarrenGlen » Sun Mar 31, 2019 4:46 pm

Hugh Robjohns wrote:I'm glad you picked up on the fact that Roland uses JIS screws in its construction -- as does most Japanese equipment.
...

Most JIS screws are identified as such by having a small dot on the screw head alongside the cross (or occasionally a x mark).

yep except I couldn't find that mark on Coras remaining front panel screw, or many others from underneath. Either the marks are not there or the screw surface is so rusted that I couldn't make it out. The "dot" theory is a nice rule but I'm not sure that it was always adhered to.

And so many examples of Jupiter 8s that ive seen close-up have their front crucial 3 panel screws "knackered" and ripped apart for this exact reason...some dood has just shoved an electric drill with a phillips head in there to do them up fast and instead of the drill bit popping up at the end when things get tight, instead it bites hard and then just shreds the screw teeth. Not a good look when you are staring down at it constantly as you play.

Anyways hopefully the article helps some owners to avoid damage in the future with some newfound knowledge!

Cheers Hugh!
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Re: Old Roland Jupiter 8 restoration

Postby Folderol » Sun Mar 31, 2019 5:51 pm

Just looking in again for an update.
Seriously impressed with your continued dedication and close attention to detail.
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Re: Old Roland Jupiter 8 restoration

Postby DarrenGlen » Sun Mar 31, 2019 11:56 pm

Folderol wrote:Just looking in again for an update.
Seriously impressed with your continued dedication and close attention to detail.

Thanks Fold you know what they say ... “The Devils in the Details!”

Unless it is referring to your wife at which point you recalibrate to the other saying “Don’t Sweat the Small Stuff” hehe
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Re: Old Roland Jupiter 8 restoration

Postby nathanscribe » Mon Apr 01, 2019 11:34 am

Thanks for posting this! I restored my old Juno 6 a couple of years ago and had similar issues with screws – ended up finding a local-ish manufacturer who had an excellent range. They're not all the right finish, but for underneath I wasn't so bothered, and I preferred the soft grey of the new end cheek screws to the original bronze-y colour. Compromises, but fair, I think. Glad to see you managed to find something for that front panel, they do need to be right!
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