Inverse Time Feed Mode (G93) - HAAS Automation UK

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Book a Demo My Haas Search Inverse Time Feed Mode (G93)

This VMC/HMC feature specifies that all F (feedrate) values are to be interpreted as “strokes per minute.” This is equivalent to saying that the F code value, when DIVIDED INTO 60, is the number of seconds that the motion should take to complete. 

G93 is generally used in 5-axis work, and sometimes in 4-axis work as well. It’s a way of translating the linear (inches/min) feedrate assigned to the program – F30, say – into a value that takes rotary motion into account. When G93 is activated, the F value will tell you how many times per minute the stroke (tool move) can be repeated, based on the linear F value.

Haas has been able to accommodate full 5-axis machining for many years; however, this feature, in conjunction with aftermarket CAM systems and their post-processors, offers even more flexibility and versatility. 

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• Inverse Time Feed Mode (G93)
• Helical Motion Enhancement
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• Screen Capture

VF-1 & HRC210 Fits with a Traditional Setup

× Caution: This Rotary May Fit

For Example: When a rotary fits with alternative fixturing, it may fit in that particular Haas mill, but will require a sub-plate or alternate T-slot for proper positioning. We have labeled this particular rotary and mill combination with a yellow caution

• The size of rotary
• The size of the mill table and the machine's travels
• The space between the mill table and sheetmetal enclosure

You can design and build your own sub-plate using the dimensions of your Haas mill and the dimensions of the rotary you'd like to use on that mill. Product dimensions are available for every machine and rotary on this website.

Dimensions1 Dimensions2 Rotary Type: Single-Head Rotary

Single-Head Rotary Tables and Indexers are usually mounted to the right side of the table, with the rotary facing the centre of the machine. This is the basic setup we used to determine the fit of your rotary product.

Image shown for mounting example purposes only. Your actual rotary and mill appearance may differ.

Rotary Type: Tilting/Trunnion

Trunnion Tables, T5Cs, and TRTs are usually mounted in the centre (or slightly off-centre) of the mill table. If you are using probing on the mill, be aware of the interference with larger tools, especially during tool changes.

NOTE: Trunnion units present interference issues with the swing of the unit relative to the machine column and spindle head.

Image shown for mounting example purposes only. Your actual rotary and mill appearance may differ.

Rotary Type: Multi-Head Rotary

Multi-Head Rotary Tables and Indexers are usually mounted toward the back of the table, with the indexer heads or platter facing forward. To mount a multi-head rotary in a different orientation, you must use alternative fixturing.

Image shown for mounting example purposes only. Your actual rotary and mill appearance may differ.

Important Information:

4-axis machines cannot use dual-axis rotaries. Some options may affect mounting (EC-1600 4th-Axis Table, Low-Profile Tables, Table Spacers, Column Risers, etc. Tool Changers: SMTCs and umbrella tool changers both present interference issues, plan appropriately.

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