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Adjusting a sliding table saw bed

2/10/19       
Jake Member

I recently purchased a used Casadei Shrark 10 pi. This will be the third 10' sliding table saw I have owned, and the second with the V groove and ball style sliding system.

This is the same system used by SCM, SCMI, Paolioni, Martin and several other makers. The system is UNLIKE that of Altendorf, Holz Her (who's sliders were made by Altendorf) and the copy cat Grizzly machines that use a roller trolly system.

The saw I purchased was not in as good shape as I had hoped. Specifically because the stainless steel guides in the V groove, had become un-adhered from the extruded aluminum slider table and slider sub-table. The rest of the saw is excellent.

This is where the problem gets a little technical. I am not the least bit bothered by a complete tear down and frame up rebuild of these machines. I have done this before with my previous Holz Her that was left outside to the elements for 3yrs. After a week it was performing beyond factory specs, and did so for over 10yrs in my shop.

The Casadei factory (or whoever built the saw, scmi?) Used a VHB style tape to adhere the stainless steel guides to the extrusions. The original tape was 15mills thick, and was foam based. I assume this was to give a slite bit of "give" in the guides between the sliding system. ie: the stainless steel guides of the sub-table, 15mm balls between, and the stainless steel guides of the sliding table. I tracking down the proper 3m 15mill thick VHB tape, removed both tables, completely cleaned all the old tape off the extrusions and ss guides. Inspected everything and micked the ss balls. Everything was in good shape. I re-adhered the guides to the extrusions successfully and reassembled and attached the tables to the saw frame.

This system uses a "spreader" in the lower sub-table extrusion to adjust the pressure between the sub-table V-groove, the balls, and the main table V-groove. This spreader adjustment occurs at 16 points over the 130" table.

When the spreader is too relaxed, the balls contact 3 of the 4 ss guides per side. This causes "play" between the two tables and the balls do not roll properly, because they drag on the 3rd surface (I believe). Theoretically, the spreader should be adjusted so each set of balls contact all 4 ss guides per side (I believe).

I have spent 3 days trying to get the spread adjusted properly. I have resorted to using digital calipers and 15mm round gauge blocks (to mimic the 15mm balls) and recorded and adjusted at all 16 points. The tables are noisy and continue to drag. Either too tight? Or obviously too loose.

I am not sure I'm on the right path.

I am very familiar with the Alternator and HolzHer trolly system and have even written in to help others with their saws here. I have pulled and cleaned the tables of a similar Paolioni saw successfully, but never had to make this spreader adjustment.

Adjusted probably, and without the outrigger table attached, this system should glide quietly and effortlessly.

Casadei has proven to be useless with trouble shooting. And SCMI, who is supposed to support Casadei here in the states refuses to help because it's a Casadei Industrio, and not the newer Casadei Busellato. I have also read threads here where the users had similar problems with MiniMax (Scmi), and after service calls about the problem, the Scmi tech was unsuccessful in fixing or properly adjusting...

Is ANYONE familiar with the proper procedure for adjustment, or have any ideas? Any rogue Scmi or Martin techs willing to help?

End shot showing V groove and spreader.

2/11/19       #3: Adjusting a sliding table saw bed ...
Jared Emery

You have my condolences. I had a Minimax combo with the sliding carriage you describe, and was never able to get it to operate as good as when I bought it. I never replaced the strips like you did, but it squeaked and rumbled terribly, and also was unable to get decent support. I ended up selling it.

2/19/19       #4: Adjusting a sliding table saw bed ...
Jake Member

Desperation deepening...

Fingers crossed a tech from Casadei in Italy gets back to me.
Stiles won't help either.
The guys at Atlantic Machinery think they may be able to find someone who can help. Thanks for the symphony, anyone else have a clue?

2/21/19       #5: Adjusting a sliding table saw bed ...
Jake Member

No Felder guys either? It's the same system...


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