Jet Tools CS-275 Troubleshooting, Blade and cutting problems, Problem Probable Cause Solution

15.0Troubleshooting

15.1Blade and cutting problems

Problem	Probable Cause	Solution
		Ensure proper coolant flow; hoses unclogged; nozzles
	Coolant flow problem	pointed correctly, etc. Make sure coolant type is
		suitable for the machine.
	Material too hard	Check the blade speed and the type of blade you are
		using. Also be aware of feed pressure.
		With a new blade it is necessary to start cutting at half
		feeding speed. After the wearing-in period (a cutting
	Blade not worn-in correctly	surface of about 300 cm2 for hard materials and about
		1000 cm2 for soft materials) the blade and feed speeds
Teeth breaking		can be brought up to normal values.
	Blade with excessively fine	The swarf wedges into the bottom of the teeth causing
		excessive pressure on the teeth themselves. Use a
	tooth pitch
		blade with coarser tooth pitch.
		The surface of the cut may have undergone work
	New blade inserted in a	hardening. When starting work again, use a lower
		blade speed and reduced feed pressure. A tooth from
	partially completed cut
		the old blade may be left in the cut: check and remove
		before starting work again.
	Work piece not clamped firmly	Any movement of the work piece during cutting can
		cause broken teeth: check the vise, jaws and clamping
	in place
		pressure.
	Feed speed too slow	The blade runs over the material without removing it:
		increase feed speed.
	Blade speed too high	The teeth slide over the material without cutting it:
		reduce the blade speed.
	Insufficient coolant	Check the coolant level and clean coolant lines and
Rapid tooth wear		nozzles.
	Incorrect fluid concentration	Check and use the correct concentration.
		The materials may present altered zones either on the
		surface, such as oxides or sand, or in section, such as
	Material defective	under-cooled inclusions. These zones, which are
		much harder than the blade, cause the teeth to break:
		Discard or clean these materials.
	Blade speed too high	Reduce blade speed.
Broken blade	Teeth in contact with material	Always check the position of the blade before starting
	before starting the cut	a new job.
	Insufficient coolant	Check the coolant level and clean coolant lines and
		nozzles.
Cuts not straight	Feed speed too strong	Reduce feed speed.
	Blade not perpendicular to	Contact Walter Meier technical support.
	workpiece.

Table 5

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