4.Insert a tool, such as a hex wrench or screwdriver, through the hole on top of the leadscrew (Fig 13) at that corner of the table that is lowest.
5.Turn the leadscrew clockwise to raise the table.
6.When the adjustment is complete, install the chain over the four sprockets, and over the chain tensioner roller. Push back the chain tensioner assembly until proper tension is achieved, then tighten the socket head cap screw on the chain tensioner.
7.Install front and rear cover plates.
After this procedure, the pressure rollers should be checked and adjusted if necessary (see Pressure Rollers on page 11).
Lead Screw Thread Clearance
Referring to Figure 14 – If adjusting the table height becomes difficult or if excessive clearance forms between the lead screws and bushings, adjustment may be required as described below.
Symptoms
Table wobble is noted
Difficulty is noted in table height adjustment
Corrective action
1.Determine the corner(s) requiring adjustment.
2.Use a 1/8" hex wrench to loosen the setscrew (A, Fig. 19) between 1/4 and 1/2 turn.
To remove excessive clearance
3.Using a
For clearance too tight, causing difficulty in table height adjustment
3.Using a
After adjustment
4. Tighten the setscrew (A).
After adjusting the lead screw clearance, the table must be rechecked for parallelism (previous section).
Figure 13
Figure 14
12