Bill,

I use Vanguard 3000s. There are multiple configurations.

1) Orbiter, does cylindrical items.

2) 3000LT, flatbed.

3) 3000, with workholding vise. Very versatile.

I don't know much about the 3400s.

I believe the 3400 has the ability to do cylindrical items as well as larger flat plates etc.

You'll want to know if the 3000 is using an EP module or if it's a cartridge-based system.

EP would be preferable.

Of the comments I've heard, people prefer the 3000 to the 3400.

Although out-of-production, the machines were originally workhorses and there are repair facilities, such as Quality One Engravers, who can supply parts and service.

I have both as backup units.

The V3000 is older and came with a cartridge controller until the very last units. It will work with an EP module which is far less prone to burnout. It has about 1/4 inch of spindle travel, really limited. Some units had the sensor sleeve cut too large and would not even touch the table with the spindle nose. I had sleeves made that would just touch the table and allow a 1/4" thick acrylic keychain fit under the nose.

The V3400 came with the EP module. I think it has a slightly greater spindle travel. It runs at about 3/4 the speed of the V3000 at max. Compared to today's machines it is very slow.

Philadelphia, PA (Really Bensalem)

When you finally understand it completely... it changes.