Rotary table problem

[Michael Garbutt 1Participant @michaelgarbutt1]

Hi i have just bought a new rotary table from a reputable company. Iv just got it out of the box and im sure it should move more freely than this. What do you think ? should i contact them and ask questions ?

**LINK**

[Michael Garbutt 1Participant @michaelgarbutt1]

[not done it yetParticipant @notdoneityet]

Are the locking 'devices' free or tight?

[Michael Garbutt 1Participant @michaelgarbutt1]

They are free. I have removed them altogether even . Its even the same when the worm drive is disengaged from the table. the table will move freely but the handle/shaft is as tight as

[Sam Longley 1Participant @samlongley1]

I have that model & it was tight until I got the hang of the locking mechanism. Sitting in my armchair i cannot recall exactly how I freed it but it now runs smoothly after i fiddled with the locking mechanisms. I think one was not actually releasing. Try tapping the head of the release screw when it is slackened off. From memory it was all gummed up with dried oil or protective grease. I washed it all in turps.

[SillyOldDufferModerator @sillyoldduffer]

My table appears to be the same as yours and it's fine.

The problem may be the position of the black lever coaxial with the dials. On mine full right disengages the drive and full left engages it. There's a point just before full left where the drive engages but the table is very stiff. The lever feels as if it's hit the end-stop but it's fibbing. Your video shows the lever just about in the position where my table stiffens up. Try pushing the lever harder to the left.

Fingers crossed,

Dave

[Michael Garbutt 1Participant @michaelgarbutt1]

I know what wrong with it now . And its nothing to do with locking leavers or anything like that . The shaft with the screw on must be bent or ground incorrectly . its binding inside the outer part.

 

Edited By Michael Garbutt 1 on 05/08/2016 21:01:49

[Michael Garbutt 1Participant @michaelgarbutt1]

Gonna call the shop on monday as they arnt open on a Saturday

[SillyOldDufferModerator @sillyoldduffer]

I'm sure they'll change it, but how annoying!

[John ReeseParticipant @johnreese12848]

I used to have a Grizzly super spacer that had a similar problem. I played with the eccentric that controls worm engagement. I managed to get it to work freely when turning counterclockwise but it continued to bind when turning clockwise. I think the problem related to a small diameter shaft on the worm allowing it to deflect ans bind on the gear. Never did et the problem resolved before I sold it.

[paul raynerParticipant @paulrayner36054]

Hello all

I've used my rotary table for the first time today on my mill and I was quite alarmed how much the table juddered about. I ended up pushing down the clamps whilst rotating the table at the same time. surely this can't be normal? its a vertex table the x y & z were all locked down it was the rotary top that was jigging back and forth. any thoughts?

regards

paul

[Simon CollierParticipant @simoncollier74340]

I returned a new 4" Vertex rotary table and got another one. I think the shaft was bent. The undamaged replacement has been a joy.

[Roger HeadParticipant @rogerhead16992]

@ paull rayner

Paul, the lever that swings the worm in/out of engagement with the main gear must be in the fully-engaged position. If it isn't, then the degree of disengagement creates increasing amounts of backlash and the table can then thrash around under the influence of the cutter. My Vertex tends to move (*very* slightly) away from full engagement as I am using it, and it's now second nature for me to keep tapping it to make sure I don't run into trouble.

Roger

[paul raynerParticipant @paulrayner36054]

Roger

Thanks for that, It's one I picked up somewhere or other some time ago, like you do and never got round to using it. I had a quick look and the leaver spun round 360 deg so I nipped up the grub screw but it only moves very slightly 2 or 3 deg unlike the 20 deg marked on the dial. I think I will leave it till next weekend when I have more time and strip it down because I think something is not just quite right. Any further suggestions from the collective welcome in the meantime.

Thankyou again

Regards

Paul

[Michael Garbutt 1Participant @michaelgarbutt1]

Called them today at 8.30 and they are really apologetic and will get some one to look at my video straight away as it should not be as i describe. They would be in touch as soon as they look at it. So i wait till just before 5pm before calling them back as iv heard nothing, and they havent had time to look at the video as they are really busy this week preparing for an open day this weekend.

hmmm

Edited By Michael Garbutt 1 on 08/08/2016 19:17:50

[David TaylorParticipant @davidtaylor63402]

I have a Vertex rotary table and it has a tight spot in the worm. I only discovered it last week as I usually use it freehand. Shop is too far away to return it anyway

I think I got a bad batch when I bought my workshop 40th birthday present – lathe leaked all the oil out from everywhere, milling machine gear shaft has a sticking keyway meaning you get stuck between gears, and the rotary table has a tight spot. I guess you get what you pay for, and I paid for Chinese and Indian cheap iron.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Michael Garbutt 1 on 08/08/2016 19:17:06:

Called them today at 8.30 and they are really apologetic and will get some one to look at my video straight away as it should not be as i describe. They would be in touch as soon as they look at it. So i wait till just before 5pm before calling them back as iv heard nothing, and they havent had time to look at the video as they are really busy this week preparing for an open day this weekend.

hmmm

.

hmmm, indeed

Too busy to look at a 42 second video, to help a disappointed customer.

… Maybe too busy selecting some items that are good enough to let prospective buyers handle.

MichaelG.

[JasonBModerator @jasonb]

Having just had mine apart (see other RT thread) you may want to check that the preload on the thrust bearing is not too high.

If you look from below there is likely to be a collar that screws on to set the preload, loosen the cap head spreader screw and use two pins in teh holes to unscrew the collar a little and see if that eases things. If so nip it up to give a good feel and then tighten the spreader screw again.

[KWILParticipant @kwil]

Never did like that method of locking the collar. If the collar is a sloppy fit when loosened, the cap head spreader screw tends to cause axial movement on one side, (ie tilt), pressing the thrust bearing unevenly.

[JasonBModerator @jasonb]

It was quite a good fit, had to use the pin spanner to wind it back on and the slot is off centre so it bends the thin side where the head is away

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