Accuracy Diagnosis - Mechanical Factors

Mechanical issues that can affect accuracy on Stuga machines

Accuracy

Back To General Accuracy Guidelines

The Mechanical systems on a machine are all prone to wear and tear, maladjustment, alignment, swarf ingress, lack of lubrication and collisions.

It is vital that all mechanics of the system are fully checked out and set and working correctly before any software adjustments are carried out

Mechanical Issue	Description	Link to Page	Common Symptoms	Affected Machines
Recent gripper crash - alignment	Following a gripper crash with profile, gripper position is out / does not grip properly		Gripper does not pick up profile correctly Gripper assembly is loose	All Particulalrly Autoflow
Backlash in Ring	Ring gearing is worn and has developed backlash		Operation position in Y and Z varying randomly
Clamp Pressures - MH and Saw	Clamp pressures have been incorrectly adjusted and profile is not clamping correctly - ie not pushed to backfence /
Backlash Racks	The X axis Gripper or/And Saw pusher can be moved Back and forth when the drive is enabled.		Operational position in X axis will Vary, Slots may not be Very Square or Round. Also Saw backtoback Varying.	All
Pinion gear wear	Backlash cannot be eliminated from the rack and May effect the Main Scaling of the Rack		Operational Position in X axis will Vary along with Saw Backtoback Varying.	All
Gripper nose / gap
Clamp / Rollers alignment
Saw Clamp parallelism
Saw kerf
Saw angles
G axis Parallel to Rear Rollers -ZX4
G axis parallel
G axis datum
Laser alignment	Used where Machine cannot do a Trim Start and is the Datum point End of Bar	Laser Setup on Flowline/ZX3 for Laser Holes	Laser Hole Errors, Operational position in X axis varying randomly	ZX3 and ZX4 Non All in One Versions
Rack alignment / height
V Notch bed height alignment (ZX4)
V notch blade setup
Seized rollers
Saw bed alignment
Zip gate to grip height
gripper slip
grip height to underrollers
zip gate opener fitted wrong way
Journals
Infeed grip / pull pads
Saw infeed lift / load alignment
Z blocks sticking out / badly adjusted
Datum sensors
Zero pulse on motor working
Keyways
Grubscrews loose
Sync pulse on Beckhoff systems
Centraliser not getting to position
Saw damper
Grip finger angle
Grip push too far
Saw top clamp pressure - Hi / Low

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Draft