GMM-Series Milling Machine Welding & Cutting accessories
6. Speed Governing Instruction
6.1 Speed Setting Table
Processing object Speed setting Arcing time factor
Aluminum，Copper，
Plastics approximately 5500–7500 rpm 60 %
Material intensity≤400
N/mm² Speed 3–5 approximately 4500–6500 rpm 40 %
Material intensity > 400
N/mm² Speed 2–3 approximately 2500–4500 rpm 30 %
Chrome steel，Stainless
steel，Fine-grained steel Speed 2–3 approximately 2500–4500 rpm 20 %
Notice
Arcing time factor means the working time of the machine under
full load, this percentage was calculated on 100 minutes, such
as: 60% represents the machine can only work 60 minutes every
100 minutes.
Please pay attention to the arcing time factor!
6.2 Speed Adjustment Notes:
First adjust the speed to the mid-range(‘4’);
The bevel height should not too high at the beginning;
Reduce the rotation speed if much sparkle appears.
If there is no obvious sparkle appears, you can increase appropriate speed;
The faster the rotation, the faster processing;
More sparkle, the cutter damage more quickly;
Professional indexable cutter blade can take higher temperature and more sparkle, can adapt
to higher speeds as well;
For fixed operation object, the speed can be set in the “1”in order to avoid overload operating;
do not keep the machine at the same speed all the time.
7. Maintenance and Repair
Maintenance position Maintenance method Maintenance material Maintenance time
Altitude controller Clean and add the lubrication Lubrication Weekly
Vent Clean Air Necessary
Gear Replace gear lubrication
After 100 hours work
Carbon brush
Replace carbon brush （Carbon
brush overload will cause the
machine stop automatically)
Necessary
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