I see a 4" Sherline, with tilt mechanism for about USD 500,- That is not cheap. The repositioning accuracy should be +/- 6 arc minutes according to their own specifications. My "failed" repair gives an almost twice as accurate result. So am I too demanding here? What are your thoughts about this?
@@Michel-Uphoff ooh, good question. If the original was good before the damage, then there is only an error across one tooth gap, or have I misunderstood? My thought was to make metalock repair key, to pull the crack as snug as possible.
For a while I too was shopping for a 4” rotary table, I thought them expensive and had toyed with making my own but cutting the gears defeated me. I meanwhile I kept a watch on EBay and found some one selling a beautiful old rotary table from a BCA jig borer. The lack of the hinge is not so serious as my mill can act in horizontal mode readily. Might at least be worth keeping a watch yourself. Good luck and happy hunting.
Nice attempt! I bought a Vertex 4" rotary table made in Taiwan a few years ago. It was not cheap but is working well for me. I don't have a super accurate electronic level but I have a sine bar and gage blocks that I could check it with but never have. It has a 10 arc sec vernier but they only claim 40 arc sec accuracy, but that is enough less than 1 arc min that I'm happy. Mine is not tiltable, but horizontal and vertical, but it has not come up for me that I need a funny angle.
7:37 Looks like someone is going to have to make a gear puller. Love your channel and content. it's very comprehensive and informative. Great job on this repair
If you're buying a new one, I'd recommend going with a Taiwanese made brand such as Vertex. It's not that cheap but not expensive as the precision ones made in EU.
"A" for effort Michel, just a shame it didn't pan out how you wanted. It'll be very interesting to see what suggestions are put forward for a Rotary that fits your spec's.
Hi Colin 🙂 Oh, it's not a big deal.. It can't be a party every day, as we say here in the Netherlands. I have seen a few candidate 4 inch rotary tables, but the most important specification: The maximum repositioning angle error, is hardly specified anywhere. So I don't trust it..
@@Michel-Uphoff I've got the Proxxon UT 250 back when it was first released but unfortunately I don't think it'd go close to the angle error spec's you're wanting. However I wonder if their UT 400 Universal Dividing Table might? Being Proxxon it wont be cheap but it would fit your PD 400 Chuck & on the FF 500 ...
@@colincreedtattoomachines Hi Colin, I have looked into the UT250, but the specs are not that good. Besides that, it is not tiltable. I can't find any specs for the UT 400..
@@Michel-Uphoff There's very little about it on the Proxxon official website but I think their catalogues or the Manuals might contain more..? I'll see if I can find anything & I'll email it to you.
@@Michel-Uphoff I watched carefully. I understand your problem, I am just showing where your error is coming from. It is very hard to repeat incremental angle measurements for each tooth. Any error between teeth is going to show up in your final measurements.
@jrkorman Then you must have seen that the repositioning error was within an arc minute when I tested it. The error isn't incremental. I think there were a number of issues that contributed to the total error.
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I see a 4" Sherline, with tilt mechanism for about USD 500,-
That is not cheap. The repositioning accuracy should be +/- 6 arc minutes according to their own specifications.
My "failed" repair gives an almost twice as accurate result. So am I too demanding here?
What are your thoughts about this?
@@Michel-Uphoff is it worth trying to repair the gear?
The new gear or the broken one?
@@Michel-Uphoff ooh, good question. If the original was good before the damage, then there is only an error across one tooth gap, or have I misunderstood? My thought was to make metalock repair key, to pull the crack as snug as possible.
For a while I too was shopping for a 4” rotary table, I thought them expensive and had toyed with making my own but cutting the gears defeated me. I meanwhile I kept a watch on EBay and found some one selling a beautiful old rotary table from a BCA jig borer. The lack of the hinge is not so serious as my mill can act in horizontal mode readily. Might at least be worth keeping a watch yourself. Good luck and happy hunting.
Nice attempt! I bought a Vertex 4" rotary table made in Taiwan a few years ago. It was not cheap but is working well for me. I don't have a super accurate electronic level but I have a sine bar and gage blocks that I could check it with but never have. It has a 10 arc sec vernier but they only claim 40 arc sec accuracy, but that is enough less than 1 arc min that I'm happy. Mine is not tiltable, but horizontal and vertical, but it has not come up for me that I need a funny angle.
Thank you. I will look into that brand.
7:37 Looks like someone is going to have to make a gear puller. Love your channel and content. it's very comprehensive and informative. Great job on this repair
Thank you 🙂
No gear puller here 😁
If you're buying a new one, I'd recommend going with a Taiwanese made brand such as Vertex. It's not that cheap but not expensive as the precision ones made in EU.
I wil try to find the specs. Thanks!
If the problem is that made gear, have someone make a gear for you. Mr Gotteswinter does precision stuff! Anyway, Nice video. Thanks for sharing!
"A" for effort Michel, just a shame it didn't pan out how you wanted.
It'll be very interesting to see what suggestions are put forward for a Rotary that fits your spec's.
Hi Colin 🙂
Oh, it's not a big deal.. It can't be a party every day, as we say here in the Netherlands. I have seen a few candidate 4 inch rotary tables, but the most important specification: The maximum repositioning angle error, is hardly specified anywhere. So I don't trust it..
@@Michel-Uphoff I've got the Proxxon UT 250 back when it was first released but unfortunately I don't think it'd go close to the angle error spec's you're wanting.
However I wonder if their UT 400 Universal Dividing Table might?
Being Proxxon it wont be cheap but it would fit your PD 400 Chuck & on the FF 500 ...
@@colincreedtattoomachines
Hi Colin,
I have looked into the UT250, but the specs are not that good. Besides that, it is not tiltable. I can't find any specs for the UT 400..
@@Michel-Uphoff There's very little about it on the Proxxon official website but I think their catalogues or the Manuals might contain more..?
I'll see if I can find anything & I'll email it to you.
@@colincreedtattoomachines Thank you!
I have this same rotary table. I think it’s a piece of junk but it’s all I can afford.
Nice try. I can also see another source of drift due to not using a hole plate.
Can you elaborate on that?
@@Michel-Uphoff The quickest is this video by MrPete222 [3wd8wE_VxPo] using a dividing head.
@jrkorman Have you actually seen this video?
I don't have one, and my rotary table was broken, as told.
@@Michel-Uphoff I watched carefully. I understand your problem, I am just showing where your error is coming from. It is very hard to repeat incremental angle measurements for each tooth. Any error between teeth is going to show up in your final measurements.
@jrkorman Then you must have seen that the repositioning error was within an arc minute when I tested it. The error isn't incremental. I think there were a number of issues that contributed to the total error.
That sucks! Would a larger OD gear fix the problem? Or not as deep of a tooth depth?
No, unfortunately. That won't work. A bigger gear means a different rotary table.