[JerryFlyGuy]

Anyone ever tried to put a NEMA 34 size motor on a "90" size planetary. I've read many places that they are infact one and the same just a different way of calling them out. However when I when to Bayside's website it would appear that the bolt pattern is different.

Which way is right?
Here's a link to the bayside site showing the dimensions.. BAYSIDE'S PAGE
They are only off by 1.575mm [bolt circle] so its not much.. but is it too much?

I certainly don't want to buy these if they don't work!!

Thanks
JerryFlyGuy

[Adobe Machine]

Those gearheads are just to expensive to be wrong or "kinda fit" I used their pn# px-34-005 with my nema 34 servos , and the fit was exact.With their smooth shaft coupler,a couple of mm out and there may be some fatal " slip" or breakage .the tech reps were very helpful with the engineering pre-purchase. ph 800-305-4555.I notice on the inspection report sheet that the adaptor is listed as an MX90-005,so they are most likley related,but I would call 1st and confirm.

[JerryFlyGuy]

Adobe, I actually did call my local supplier and he was like.. what is it.. never heard of it.. anyway after I TOLD HIM he was my local supplier for them he went looking and sure enough.. he was.. Anyway he doesn't know squat about them other than the price.. and he was WAY out of this world as far as that is concerned.

I missed a set of them on ebay not to long ago, however it's pretty rare for them to come trough there. Oh well... I can do it w/ belts and I've got my drives designed that way already, however these [planetary's] would make life alot easier and the design alot more streamlined. I guess a person could make an adapter plate to make the 90's work on a 34 frame, its not optimum though.

The inspection sheet you are talking about is one that came w/ it? Maybe they are the same then.. or maybe the person inspecting them just can't tell them appart.. I'm sure that would be easy to do. Hrm.. the website would lead a person to think otherwise... [ in regards to if they fit or not]

Jerry

[Adobe Machine]

The inspection sheet was from the factory..includes the pn#, serial #, actual physical measurments and 6 backlash measurments ( largest being 1.01 arc minutes).Too bad your dealer is such a dummy...the product is excellent,their quality control is A-1 .
Someone at the factory should be able to help you.

[JerryFlyGuy]

Well, to better get a grasp of what I need when it comes to these Planetary's I desided to call the factory[customer service # on the website].. and see what they said.
My question to them was simply is there a way to change a 90 size gear reducer over to fit a 34 size NEMA motor.. of course he tell's me "oh yes, no problem... in fact we build them to fit whatever you need". So I tell him, well actually I'm looking at buying some used one's however they are currently a 90 series and I'm wondering if there is a way to convert them. As soon as he hear's this he starts telling me well it is possible by making a new mounting kit for them, however there are over 250 different configuration's of mounting kits to fit Nema 34's and that I'd have to tell him what motor I'm going to use etc. So I ask.. you mean just simply a NEMA 34 w/ a 1/2" shaft isn't good enough and he's like no.. Oh.. and to get the proper mounting kit is like... $350 so.. I can see that changing the gear box over is going to cost some coin, To a certain extent this is understandable. However if I'm understanding him correctly, just because a person buy's a 34 series reducer doesn't nesc. garrentee that it will fit your 34 size motor. I was always under the impression that NEMA 34 was a standard to which all motor's of this size were made? Maybe I'm just better off going to belt reducer's.



Jerry

[Adobe Machine]

Can you personally measure both componets? If they are not the identical mirror image,then you may have a torque transfer problem I.E...bayside uses a "clamp type" smooth coupler,any misalingment could cause fatal slippage.The size of your machine and the torque to move the gantry table is going to be substantial to say the least.
Using a double reduction timing belt drive drive may be a better answer for your machine.With the torque involved, I would reccomend good, heavy duty shafting, supported by high quality roller bearings on both ends of the shaft.Use two idlers per belt, one non adjustable and one adjustable to keep enough belt on the small pully(enough teeth engaged) usually, slippage starts at the small end. "Q" type bushings are good at transfering torque, as they both clamp a shaft and have a keyway.They are also easier to service as they have an arrangment to use the holding bolts to push the pully off the taper if teardown in the future is necessary.and again good luck on your monster machine !

[JerryFlyGuy]

I hear ya Adobe, I'd sure love to get my hands on the bayside stuff, and as far as ratings and what not , they are rated to take the load's I would be imposing on them. However its the availability of the right unit's which is causing me fits. Anyway I'd like to progress w/ my project so it's looking more and more like I'll end up w/ the belt style system. Of course you know that as soon as I order the laser cutting and the nesc. belts, that the reducer's I'm wanting will show up on Ebay.. Doesn't it always happen that way? Anyway.. enough for now.. I'll let ya know how it goes.. I'm gonna have to start posting pic's on of these days...

Jerry