Romi Machine Tools Ltd., a major manufacturer of CNC Lathes, Production Turning Centers and Machining Centers, is now shipping its first C620 CNC lathes in one or two meter bed lengths. Swing over the bed is 620mm or 24.4" A2-8" spindle is standard.

Romi has designed the C620 for maximum flexibility in configuring the machine to customer needs - offering a variety of headstocks, bed lengths, turrets, tooling and operating choices The control is a Siemens Sinumerik 802 sl with 10.4" LCD monitor. Both manual and hydraulic tailstocks are available.

One and two-meter bed lengths

For chucking work, customers will usually opt for the one-meter version which offers a smaller footprint, and the two-meter bed length for shaft work. Customers requiring heavy low-end torque will want the geared headstock. Parts requiring higher rpm and better finishes will be better served with the v-belt, direct drive headstock. Both bed lengths are available with live tooling options.

Live Tooling

The C620 can be equipped with an electrically driven disk type turret with VDI-40 tooling or a servo driven WTO tool turret allowing machining with static and live tools. A 4-station electrically driven vertical axis turret is also available, as is a 3-position quick-change toolholder.

The geared headstock version can be equipped with a hydraulic indexing system with 72 positions allowing milling and drilling operations. With the direct drive headstock, an optional disc brake system allows milling and drilling operations in 360 different angular positions. Rigid tapping operations can be accomplished due to the no-play feature of the transmission.

Three Operating Modes

A C620 Combination Lathe equipped with the optional Romi Manual Machining Package offers three machining modes depending on operator skill levels.

1. Manual Mode

The operator machines the part as a conventional lathe using the Control Apron. Parallel Turning, Taper Turning, Radius Turning, Drilling and Grooving can all be performed in Manual Mode.

2. Cycles Mode

This is a semi-automatic mode. The machinist fills in the conversational screens on the Control for Feed, Speed and Cycle Data and approaches the part manually using the Control Apron. He then performs the machining cycle by pressing the Cycle Start Button. Machining operations in this mode are Drilling, Tapping, Grooving, Cutoff, Threading, and Rough & Finish Turning.

3. Teach Mode

In this mode, the operator, while machining the first part, saves the machining process step-by-step into memory. The control converts these machining processes into a program that can be run automatically on subsequent parts. Manual operations and cycles operations can be saved together into the same program and stored in the CNC memory or Flash Card.