Lost grub screw! - HAAS VF-4

[SteJMC]

Hi,

First post, here goes;

I've got a 1998 Haas VF-4 and I've been having spindle orientation problems. I've took the covers of the headstock and it looks like the encoder pulley on the shaft end is missing a grub screw. I've got the pulley on the encoder, a toothed belt, which looks fine and then another small pulley that I can stop with my hands when I rotate the spindle. Obviously this is causing the encoder to be 'out'.

I've noticed there isn't actually a flat where the missing grub screw sits which is strange, is that normal?

Anyway, my main question is - does anyone know what size thread this grub screw will be? It looks *roughly* 3/16, not sure on the pitch/tpi.

Thanks.

[Geof]

Originally Posted by SteJMC ....Anyway, my main question is - does anyone know what size thread this grub screw will be? It looks *roughly* 3/16, not sure on the pitch/tpi. Thanks.

It will very likely be 1/4"-20 UNC. It may be 10-24 which is close to 3/16" OD.

[HAILINHAAS]

8-32 Unc

[HAILINHAAS]

You Will Need To Set Parameter 254 After You Have It Tightened Down ..

[HAILINHAAS]

Disregard that last one .. oops ..257 ... not 254

[SteJMC]

Yeah, 8-32 was the one, thanks!

[SteJMC]

Don't know if it's worth starting a separate thread for this, I've got a damaged waycover on this machine.

Where would I go about getting a replacement, is it a direct from Haas job?

I'm in the UK, has anybody got any ideas of prices?

[CNCMechTech]

I guess it would depend on how fast you need to be back up and running. If things arnt tight I would checdk around locally. Your best bet to get back up and running fast would be to call Haas direct or Arthur Machinery 1-800-562-2423 out of Chicago Illinois.

[Edster]

http://www.hennig-inc.com/overview.htm

Try these guys, way covers repaired fast turnaround.

I have one of their replacement way covers on the z axis of my fadal. It's great quality and about half the price of the teleflex cover.