council on working center johnford vmc824

[LuisVito]

Hello everyone!:smile:
then the problem is this: I and 2 my friends are willing to buy a working center used for x reasons, we have seen some models and among many we have seen a vertical working center johnford vmc824 of 1990 approximately with table 1100*470+ 4th continuous axis nikken. it seems in good condition, but the thing that does not convince me are the guides that are still at the tail of swallows and not recirculation of spheres, the type that sells the machine told us that these guides are better from the point of view of stability while those with spheres are less stable but faster. my doubt is that maybe the machine is too slow and that can not work with feeds of about 2000..3000 mm/min.
Have any of you ever used the car in question? if you let me know how it goes.

Thank you.

 

[Meccbell]

If it is 1990 more than guides I would worry about electronics.
at that time the feeds you say were a rarity (there were machines with the speed at max 5-6 mt./minute).
before purchasing it controlled with the service of the brand of the cn that for that type of control and relative drives there are or not spare parts.
Otherwise you risk spending a nonsense in buying the machine, but at the first tab that goes in smoke you have to completely retrofit all the electronics.
And it's not good to see... (already done experience, unfortunately)

 

[stevie]

the problem in my opinion is not so much in the fact that the machine has "still" as you say the flat guides (other than even today are built flat guide machines), as in the control package, drive and engines.
I don't know what kind of work you have to do but to be able to work on the 2000-3000 mm/min control must have a good look-ahead and control of the jerk otherwise forget to be able to work in tolerance. on a machine like the '90s I doubt that control has these characteristics.
of course this regardless of the speech reliability.