Setting Up

Un-crating and Setting Up the MI-1220 LTD
Moving the Machine
Moving a machine tool can be dangerous. Improper techniques and methods may injure you and/or damage the machine. To find a professional to move and  site your Smithy machine, look in your local Yellow Pages under “Machine Tools, Moving and/or Rigging”. If there is no such listing or your community does not  have a rigging specialist, a local machine shop or machinist may be able to provide referral.
When you pick up the machine at the shipping terminal, bring a crowbar, tin snips for cutting the metal straps, and a hammer. If there is obvious shipping  damage to the crate, you’ll be able to inspect the machine before signing for it. Note any damage on the bill of lading (shipping document). Fill out the claims  forms and notify both Smithy Co. and the shipping terminal about the damage. Failure to notify both parties can complicate and/or invalidate a claims process.
Trucking company terminals usually have forklifts to assist customers. It’s most convenient to transport the machines in trucks without canopies and large  vans.
Uncrating and Positioning the Machine
Tip the crate from the tailstock end up and over the machine.
The machine is assembled, inspected, and ready to do in its stand. It’s wrapped in a water and greaseproof cover, strongly braced, and crated. A box of  accessories is also in the crate.
The metal bands that encircle the crate are under tension. Wearing eye protection and gloves cut the metal bands with tin snips.
The cut edges are sharp. The bands secure the crate top to the base.
After removing the straps, lift off the crate top. Tip the crate from the tailstock end up and over the machine. Do not damage the crate. You may need it another  time to transport the machine.
Once your crate cover is removed it is time to put your machine on its bench. The machine is just less than 500 pounds so make sure you have some extra  hands to help. There are four lifting pints that pull out from the bed of the lathe. You can use chains or a tow rope to wraparound these pins and the aid of a lifting device such as an engine hoist to list the machine on to a bench rated to support the machine’s weight.
Without a mechanical device to aid in your lifting you can lighten the machine by removing a few or all of the following:
    1. Remove the four hexagon socket-head screws at the base of the millhead support  column. If a screw runs through the belt box into the flange of the support  column, remove it too.
  1. Lock the millhead-locking handle.
  2. Lift the millhead and column off the lathe head. You may have to rock it back and forth while lifting it. Make sure that the mill head is locked to the column before removing the millhead.
  1. Loosen the tailstock lock and pull the tailstock off the end of the bed. The gib and locking pin will fall out. Be careful not to lose them.
Three-Jaw Chuck
    1. Remove the three bolts behind the chuck that hold it to the spindle flange (Figure 5.2).
The chuck will come off. Don’t let it fall onto the ways. Placing a board between the chuck and ways will protect the ways.
The chuck attaches to the spindle flange with three bolts.  The one bolt located on the other side of the spindle does not show.
Place the machine on a strong, rigid table 40” long, 24” wide and 28” to 33” high. We recommend you to bolt down the MI-1220 LTD machine using the holes in the base of the bed or using the lifting handles as they held the machine to the shipping pallet.
Selecting a Location
There are several major considerations for selecting a location for your Smithy.  Operation is from the apron side, so allow at least 40” to 48” clearance in front of the machine.
The machine should be on a 20-amp circuit, positioned as close as possible to the power supply. Try not to use an extension cord. If you must use one, check with an electrician about the proper size.
Provide ample working light over the operator’s shoulder.
Check along and across the bed to make sure it is level.
Place the machine on a solid foundation, concrete if possible. If you must put it on a wood floor, make sure it is adequate. Brace it if necessary to prevent sagging or settling.
Make allowances at the back of the machine tool as at its end and above it for later additions, attachments, and/or accessories. Provide clearance on the left end for bar stock to be fed through the spindle. If you are considering placing more than one machine in an area, allow enough floor space to feed long bar stock to each machine. Notice: To check bench and bed level accuracies, successively place level at A, B, C, D  (longitudinal positions) and E and F (transverse positions). Bedways alignment in the longitudinal place should be better than 0.0016/40”; alignment in the traverse plane should be better than 0.0024/40”.
Cleaning and Lubricating the MI-1220 LTD
Smithy machines are shipped with protective grease coating called cosmoline. Use WD-40 or non-corrosive kerosene to remove the cosmoline.
Once you have your MI-1220 LTD set up and positioned correctly, you are ready for lubricating. You must do this carefully and thoroughly before starting the machine. Use a pressure oil can and a supply of good quality SAE No.10 weight oil.
To be thorough and complete, follow this routine:
Oiling the Ways
Run the carriage as far to the left as possible. Put a few drops of oil on the ways. Run the carriage to the extreme right and repeat. You may want to use Way Lube, special oil formulated for the ways.
Oiling the ways
Oiling the Millhead Quill
Use the mill handles or fine feed crank to lower the millhead down.  Apply a thin layer of oil to the quill and work it down and up until it runs smoothly.
Oiling the Headstock
Oiling the Millhead Quill
Oil the button behind the D gear.
Open the gearbox door to expose the pick-off gears. Oil the button in the casting behind the D gear. Then put a few drops of oil on the teeth of all the gears.
Grease the zerk on the A gear shaft.
Check the sight glass under the chuck. If necessary, add oil until it is half full. The oil fill plug is at the back of the headstock above the motor. Be careful not to overfill it. The gearbox requires only 8 to 10 ounces of oil.
Oiling the Carriage
Lubricate the oil buttons in the cross feed table. There are two buttons on the left of the saddle for the bedways and two on the front of the cross slide for the cross slide ways.
Oil the button in the center of the cross slide.
Put a few drops of oil on the compound slides.
Oiling the table
Oiling the Compound Angle Toolpost
Oil the buttons along the cross feed table.
Oil two buttons on top of the compound angle toolpost.
Oiling the Apron
Put oil in the button just behind the cross slide hand wheel.
Put oil on the button at the back of the cross slide.
Oiling the Leadscrew
Put oil in the oil buttons on the left trestle.
Put oil in the support for the right end of the leadscrew.
Oiling the Tailstock
Oil the two buttons on the top of the tailstock.
Oil the buttons on top of the tailstock.
Oiling the Mill/Drill Clutch
Oil the clutch housing button.
Put oil in the button on top of the clutch housing.
To keep your machine in peak condition, lubricate it daily after removing any debris.  Do not fill the gearbox sight glass more than half way. Too much oil will make the motor lug and sling oil out from behind the chuck and inside the belt box.
Adjusting Belt Tension
The MI-1220 LTD has two belt tensioners installed by the factory one for the mill head and the other for the pulley box.
Mill belt
Locate the “L shaped” lever and a thumbscrew at the top of the mill motor. Loosen the thumbscrew and then rotate the lever to increase or decrease the belt tension.  Re-tighten the thumbscrew when the desired tension is achieved.
Lathe belt tensioner.
Locate the belt tensioner handle on the motor mount. To tighten the lathe belts, move the tensioner handle upward so that the handle points toward the lathe head. Turn the knurled knob clockwise to tighten the belt and counterclockwise to loosen it.
Adjusting the Gibs
The MI-1220 LTD machines have straight gibs. Before using the machine, adjust the gibs evenly. First tighten the screws all the way. This will lock the movement. Then loosen each screw one quarter turn and check it. Tighten the gib, the more accurate it will be.
Removing and polishing the gibs also improves the tolerances.
With the gibs properly adjusted, review the following instructions on how to reduce the backlash, or lost motion in the screw, which also depends on the type of job you’re doing and/or individual preference.
Reducing Backlash
Backlash of 0.008-0.015” as measured on the dial is normal. If you have more backlash than that in your crossfeed table, refer to the schematics at the back of this manual, if necessary and follow these directions:
  1. Tighten the cap nut in the center of the cross feed hand wheel securely.
  2. Tighten the set screw inside the T-slot so the brass nut cannot move.
  3. Tighten the screw in the base of the brass nut. This will remove play between the threads in the cross feed screw and nut. Do not over tighten it or there will be excess wear on the nut.
If there is still excess backlash, place one or more shim washers between the large shoulder of the cross feed screw and the bush bearing. Ask a Smithy technician about our antibacklash shim washer kit, Item number K99-190.
To reduce backlash, tighten the setscrew so the bush bearing will be secured.
To install shims, turn the hand wheel clockwise to move the cross table away from the screw seat. Loosen the setscrew. Then pull out on the hand wheel until the bush bearing is free of the seat. Remove the cap nut, hand wheel, dial, keys, and bush bearing. Install one or more shim washers and reassemble.
Running in the MI-1220 LTD
Though all Smithy machines are run at the factory and again before shipping, it is wise to put your machine through a break-in run before putting it to work. After oiling the machine, check the belts to make sure the tensioners are correct. Do not plug your machine yet. Follow these steps:
Millhead Run-in
  1. Make sure that the power switch for the lathe motor and the mill motor are both in the off position.
  2. Close the door of the gearbox before starting your machine.
  3. Plug the machine into a grounded 20-amp circuit.
  4. Start the mill motor by pushing in the green start button. After a few minutes, push in the red stop button and allow the motor to stop. Flip the yellow switch cover and switch it to the opposite position and repeat the above procedure.
  5. Start the lathe by pushing the green button on the lathe control panel.
  6. Engage the half nut by pushing down the half nut handle, pull up to disengage. Do the same with the cross feed and the longitudinal feeds.
  7. Push the lathe stop button and allow the motor to stop. Move the direction selector to the left and flip the yellow cover and switch the red toggle switch to the opposite position and repeat the above procedure. During the run-in, try all of the controls. Get a feel for your machine before you start to work.
This machine is equipped with power crossfeed and longitudinal feed.
Caution must be taken to not run the power feeds past their limits of travel. As part of normal operation procedures, run each axis through the entire length of the proposed machining operation before engaging any of the power feeds to assure there is sufficient travel to accomplish the desired task. Failure to do so could result in running one of the power feeds to the end of its mechanical limits. This is what is known as a “CRASH”. A crash can cause damage to the work piece and severe damage to the machine. Remember that becoming familiar with your machine is the best safety insurance you can have. Lathe Run-in
  1. Start the lathe by pushing the green button on the lathe control panel.
  2. Engage the half nut by pushing down on the half nut handle, pull up to disengage. Do the same with the cross feed and the longitudinal feeds.
  3. Push the lathe stop button and allow the motor to stop. Move the direction selector to the left and flip the yellow reversing switch to the opposite position and repeat the above procedure.
During the run-in, try all of the controls. Get the feel for your machine before you start to work.
Setting Lathe and Mill Speeds for the MI-1220 LTD
Setting Lathe Speeds (RPM)
Changing belts changes lathe speeds. The lower speeds use the two short belts. There is only one position for the motor pulley to idler pulley belt. It goes on the smallest sheave of the motor pulley (behind the largest sheave, Figure 5.14) and on the largest sheave of the idler pulley. For 160 RPM, se the idler pulley to lathe spindle pulley belt on the smallest sheave of the idler pulley to the largest sheave of the spindle pulley (position C). Move it in once sheave for 250 RPM (position D) and one more for 400RPM (position E).
For the higher speeds, remove the two small belts and use the single long belt from the motor pulley to the spindle pulley. For 630 RPM (position F), run the belt from the outside sheave (closest to the door) on the motor pulley. Move it one sheave for 1000 RPM (position G). For 1600 RPM (position H), run it from the largest motor pulley sheave to the smallest spindle pulley sheave.
Setting Mill/Drill Speeds (RPM)
Set mill speeds using various combinations of the mill belts. For 315 RPM, place belt A/B in position 4 and belt B/C in position 1. For 500 RPM, leave belt A/B belt in position 4 and move the B/C belt to position 3.

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