Lotem 800 centre pins

[mattdj]

Hi All

Anybody have any idea as to why our plates are 1.5mm off centre from side to side ( tick to edge of plate)
Is there an adjustment we can make to maybe the centre pins??

Thanks all

 

[Kiltie]

Depends on whether you have a Fibre Head (L800V or L800V2) or a Lotem Quantum (L800Q).
If you have L800V then plate is aligned on the drum via the small punched groove. If this is mis-aligned then the image will also be twisted on the plate and shows up on the 'blue' edge at top and bottom of plate.
If you have a L800Q the alignment of image on plate is via plate edge detection. This is measured at the small horizontal groove on the drum, approx. 5cm below head gripper on left side (looking from the back). Clean the flat area of the drum around this area and especially the groove.
It could also be the Home Position sensor of the carriage - needs calibration.
Also of course the position of the plate centering assembly. Check the 2 screws at each end - if tight then unlikely to be this.

If it is fixed at 1.5mm on every plate then the machine parameter "Height start image area" could be adjusted to resolve this positional error, image left to right across the plate.

Let me know how you get on with this . . .

 

[shfierce]

good and detailed answer.

But first mattdj has to give his lotem model.

 

[mattdj]

Thanks for the reply folks

Firstly the model is a Lotem 800V and secondly the image is fixed off centre at 1.5mm all the time.

Kiltie , you say we could look at the height start area, where can i find this?

Thanks