HUAYUAN SLG-200HF, Manual Instruction, Page: 32 / 53

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edge of the hole. The time need delay if the consumables loss. The piercing delay time is got according to the consumable
average delay time.
Piercing finish signal can keep high shield prefow pressure to protect the consumables.
For some special situation, when piercing diameter near to the max.thickness, need consider the following:
a) The leading distance should be same with the material thickness, means 20mm material need 20mm leading
distance
b) To avoid the slag damage the protection cap, need to clean the slag before put down the torch
c) Different material may affect the piercing capacity, especially the high strength, high Mn or Gi steel, the
piercing capacity will be low.
d) If machine is difficult to piercing some material or some thickness, increase the shield gas preflow can help, the
disadvantage is lower the arc strike success ratio
e) Adopt fly piercing (without leading)may increase the piercing capacity under some situation.but this may cause
damage to the torch or other parts, which not suggest
14. Inspection before operate
Before start the machine,make sure cutting surrounding environment and protective suit meet requirements
according to “safety” of manual,and have to check one time as follow step.
WARNING
Before operation,please read carefully “safety” chapter.
Must turn off power before operate the following.
⑴
Turn off main machine power,make sure switch under off status.
⑵
Take out consumables to check and make sure clean,dry and non-oil.
⑶
If consumables damage,replace it.
⑷
After installing consumables,make sure torch and workpiece keep vertical.
1)
After power on and self-inspection,the machine will come into standby status, during this time, the indicator on the
panel should be as following:
Indicator Gas pressure Coolant position Coolant flow Start Overheat Power abnormal
Status ON ON ON Off Off Off
15. Cutting parameter table
The following cutting table is supporting the use of the "system components" in this manual; the parameters
obtained in water cut provide operating staff a quick reference for the part of the cutting.
Note:If the torch different, then consumables different, so the following cutting table will change accordingly