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ML7 Carriage shims and wear

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Brainsparks30	03/05/2019 18:04:01
17 forum posts 3 photos	I stripped the carriage for cleaning, (all full of iron chips) and noticed grease had been used, which I understand is bad. But what really vexed me is that after cleaning and oiling, when reassembled, the carriage locks up solid when the screws at the front are tightend. It is shimmed front and rear, is it possible someone had used shims to thick? They don't look like plain brass except were it appears to have worn through the grey coating on one. The screws holding the front retaining strip were a bit too easy to remove and I wonder if they had been used to adjust play. This makes me wonder about wear and how to measure how worn parts are.
Mike Crossfield	03/05/2019 18:48:56
286 forum posts 36 photos	The correct shims are made up of a laminated stack, each individual shim being 2 thou thick. To reduce the thickness, and remove play, shins can be peeled off the stack with a sharp knife. It could be that the previous owner has removed too much, and compensated by leaving the clamping screws loose. You could buy new shims, but I would be inclined to try adding some extra shim material until you get the required clearance.

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