motorizing a rotary table

[dcassyc1]

Hi Everyone,
I just joined this group and hope my first post is in the right place. I got a tip from a guy selling Phase 2 rotary tables that this group had some knowledge about motorizing the Phase 2 rotary tables. Would anyone have any experience in that area? Here's the link to the table:
http://www.phase2plus.com/details.as..._TABLES#221304
cheers
Denis

[BobWarfield]

Lots of ways to motorize. JFettig has free plans to do it for use as a CNC 4th axis with that particular table. Sir John Stephenson on these boards does such work as part of his living. There are CNC's and there are also self-contained controllers for motorized tables.

Tell us more about what you hope to accomplish?

Cheers,

BW

[philbur]

Have a look here.

http://medw.co.uk/wiki/index.php?page=DivisionMaster

Phil

Hi Everyone,
I just joined this group and hope my first post is in the right place. I got a tip from a guy selling Phase 2 rotary tables that this group had some knowledge about motorizing the Phase 2 rotary tables. Would anyone have any experience in that area? Here's the link to the table:
http://www.phase2plus.com/details.as..._TABLES#221304
cheers
Denis

[Forrest Addy]

Yup the Division Master is the way to go if you have the money. It's easy to mount a step mtor to a rotary table but you have to make some parts.

Step motors are cheap and available from not much via discounts and surplus houses. You do have to be careful which step motor you're buying. Someone will aslo bring up servo motors. They work well too but step motors and servo motors each require their own kind of drives (a box of electronics placed between power source and motor.) The drivers are available from eBay, Gekko, surplus house etc.

I usneder stand there's a way of rnning a step motor from a stereo amp and a signal generator but I don't know how the curent limit or the phase shift would be managed. Take it with a grain of salt.

[lazlo]

JFettig has free plans to do it for use as a CNC 4th axis with that particular table.

Bob, where is that posted? On CNCZone?

Glad to see the DivisionMaster was resurrected!

[philbur]

Denis, depending on how you intend to use the rotary table it may be important to have some form of backlash adjustment, both for the gear mesh and for the worm shaft axial preload. Some of the cheaper rotary tables have neither.

Without backlash control you are limited to using it with rotation in one direction only, which is OK for indexing but not much use for some fancy profiling.

Phil

[dcassyc1]

Hi Bob,
I'm trying to get a 4th axis on my taig cnc mill.
cheers,
Denis

[dcassyc1]

Hi Philbur,
yes I'm aware of the backlash problem, and don't want to attempt solving it with cnc control software. The Phase 2 tables have adjustments for taking up the backlash, it's worm and sector gearing, and from what I've seen, they try to control the teeth engagement. Perhaps it's possible to split the sector gear. I've got no idea how well the backlash can be eliminated with the stock setup, but am willing to give it a try.
cheers,
Denis

[BobWarfield]

Just click the 4" rotab link for prints.

http://www.jfettigmachines.com/

Best,

BW

[dcassyc1]

Hi Bob,
thanks for the link to the drawing, that's exactly what I had in mind.
cheers,
Denis