Ironwood FX 750 | User Manual
18
8.1 Speed Change and Belt Adjustment
Confirm that the selected spindle speed matches the suggested
spindle speed provided by the tooling manufacturer.
Before operation, check that all tools are sharp, are the correct tool
for the work to be performed, properly maintained and adjusted
according to the tool manufacturer’s instructions.
There is a relationship between tool diameter, cutting length, and
maximum rotation speed.
The maximum safe spindle speed depends on:
• Spindle diameter
• Usable length of spindle
• Length of cut
• Tool cutting diameter
• Tool specifications per the spindle manufacturer
The following charts can be used as a reference guide for the
maximum spindle speed for various tool cutting diameters given the
values of d, l, and b. Always refer back to the ratings provided by the
tool manufacturer.
Reminder:
Always place the tool as close to the bottom of the
spindle as possible.
The FX 750 machines are supplied with a 5-step motor pulley and a
5-step spindle pulley that provides spindle standard speeds of 3000,
4000, 6000, 8000 and 10,000 RPM.
A chart (Label 6) is located on the inside of the access door for
easy reference of the belt position on the pulleys for the five
speeds available.
OPTIMUM SPEED RANGE FOR TOOLS ON SPINDLE MOULDER
95
120
1. Hazard: bad machining conditions
2. Bursting hazard
3. Recommended spindle tool speed
1
2
3
Confirm the machine’s speed settings before operating. Make
certain that the cutter meets or exceeds speed rating of tool.
The diagram is an example of choosing a speed in relation to the
diameter of the tool, and the most appropriate peripheral speed for
the type of material that is being worked on. Always refer back to the
ratings provided by the tool manufacturer.
Cutting speed should always be sufficient to prevent kickback risk,
but never fast enough to cause tool damage.
The cutting speed range m/sec (lower and upper) is selected
according to the tool diameter (mm) D (left vertical axis), and the tool
spindle speed N min
-
¹ (bottom horizontal axis).
The belt attaches
to the motor
pulley and
spindle pulley.
Spindle
pulley
Motor
pulley
Guide values for cutting speed
Material
Cutter HS
(m s
-1
)
Cutter HW
(m s
-1
)
Softwood
50-80
60-90
Hardwood
40-60
50-80
Chipboard
—
60-80
Coreboard
—
60-80
Hard fibreboard
—
40-60
Plastic-coated board
—
40-60
Example:
Cutter: 160 mm diameter, v
c
= 76m s
-1
n = 9000 min
-1
Cutter speed formula:
v = (D x π x N) / (60 x 1000)
D: Tool diameter (mm)
N: Tool spindle speed (rpm)
