Charnwood 1420V Electronic Variable Speed Lathe

Introduction

This manual provides essential information for operating the Charnwood 1420V Electronic Variable Speed Lathe. It is crucial to read and understand all instructions and safety rules before use to ensure safe and effective operation. Keep this manual for future reference.

Rating Description

Hobby: Suitable for Weekend DIY'ers and woodworking enthusiasts. These machines typically have lower power ratings and smaller tooling capacities, intended for one-person use for short periods or infrequently. They require maintenance in a clean, dry environment. Expected maximum use is 100 hours annually. Using the product in excess of its rating will void the manufacturer's warranty.

General Safety Rules

WARNING: Do not attempt to operate the machine until you have read thoroughly and understood completely all instructions, rules, etc. contained in this manual. Failure to comply may result in accidents involving fire, electric shock, or serious personal injury. Keep this owner's manual and review frequently for continuous safe operation.

1. Know your machine. For your own safety, read the owner's manual carefully. Learn its application and limitations, as well as specific potential hazards pertinent to this machine.
2. Make sure all tools are properly earthed.
3. Keep guards in place and in working order. If a guard must be removed for maintenance or cleaning, make sure it is properly replaced before using the machine again.
4. Remove adjusting keys and spanners. Form a habit of checking to see that the keys and adjusting spanners are removed from the machine before switched it on.
5. Keep your work area clean. Cluttered areas and workbenches increase the chance of an accident.
6. Do not use in dangerous environments. Do not use power tools in damp or wet locations, or expose them to rain. Keep work areas well illuminated.
7. Keep children away. All visitors should be kept a safe distance from the work area.
8. Make workshop childproof. Use padlocks, master switches and remove starter keys.
9. Do not force the machine. It will do the job better and be safer at the rate for which it is designed.
10. Use the right tools. Do not force the machine or attachments to do a job for which they are not designed. Contact the manufacturer or distributor if there is any question about the machine's suitability for a particular job.
11. Wear proper apparel. Avoid loose clothing, gloves, ties, rings, bracelets, and jewellery which could get caught in moving parts. Non-slip footwear is recommended. Wear protective hair covering to contain long hair.
12. Always use safety glasses. Normal spectacles only have impact resistant lenses. They are not safety glasses.
13. Do not over-reach. Keep proper footing and balance at all times.
14. Maintain machine in good condition. Keep machine clean for best and safest performance. Follow instructions for lubrication and changing accessories.
15. Disconnect the machine from power source before servicing and when changing the drive belt.
16. To avoid accidental starting, make sure the switch is in the OFF position before plugging in the mains cable.
17. Never leave the machine running unattended. Turn the power off. Do not leave the machine until it comes to a complete stop.
18. Do not use any power tools while under the effects of drugs, alcohol or medication.
19. Always wear a face or dust mask if operation creates a lot of dust and/or chips. Always operate the tool in a well ventilated area and provide for proper dust removal. Use a suitable dust extractor.

Additional Rules for Lathes

Never attempt to adjust any part of the workpiece whilst the lathe is still in motion. Wait until the workpiece has come to a complete stop.

1. Ensure that chuck keys, tommy bars and similar items are removed before the lathe is started.
2. Always stand to one side when you start the lathe so that if anything does fly off e.g. a loose piece of bark, you will be out of the line-of-fire.
3. When mounting a new piece of timber, rotate the wood through 360° by hand to ensure that it will not hit the tool rest or the bed of the lathe and then start the lathe at its slowest speed. When you are certain that the work is secure and not too out of balance, set the lathe to the normal turning speed.
4. Always check the rotation speed before switching the lathe on to avoid the risk of starting it whilst it is set to run at too high a speed.
5. The speed of the lathe must be adjusted to suit the size, balance, length and condition of the timber being turned. The greater the diameter of the work, the slower the rotation speed needs to be. If the piece you are turning is out of balance, then you must start turning at a low speed, until it is balanced.
6. The tool must rest firmly on the tool rest before it is brought into contact with the rotating wood and must never be lifted off the tool rest as long as it is in contact with the timber.
7. Before sanding, polishing or doing anything else that brings your fingers close to the work, remove the tool rest. Getting your fingers trapped between the tool rest and the work will at least be very painful and may cause serious injury.
8. Never wrap the sandpaper of polishing cloth round the work. If it tightens up it will pull your fingers into contact with the timber and may lead to serious injury.

⚠️Risk of Injury! Never reach into moving parts.

? Wear Eye Protection

? Wear Ear Protection

Technical Data

N.B. The distance between centres will vary and be dependent on the type of centres or accessories used. Maximum distance is 500mm (20").

• Max. spindle length (without centres fitted): 500mm (20")
• Max. spindle length (with centres fitted): 430mm (17")
• Distance over bed: 350mm (14")
• Motor: DC (Carbon Brush), 750w (1hp) 50hz, 240v
• Speed Range (Forward & Reverse): Low: 250 - 750rpm, Medium: 600 - 1700rpm, High: 1200 - 3550rpm
• Spindle thread size: M33 x 3.5mm
• Spindle tapers: MT2
• Indexing Positions: 24 (every 15 degrees)
• Dimensions (WxDxH): 970 x 520 x 300cm
• Weight: 57kg
• Rating: Hobby
• Product Guarantee: 1 Year

Main Components

The main components of the lathe are:

• Headstock
• Drive Centre
• Tool Rest
• Lathe Bed
• Tail Centre
• Tailstock
• Tool Rest Banjo (with Cam Lock Lever and Height Lock)
• Tailstock (with Cam Lock Lever, Centre Lock, and Handwheel)
• Control Panel (with Forward/Reverse Switch, Variable Speed Control Dial, On/Off Switch, and Digital Read Out for RPM)

The image shows the lathe with these components clearly labeled.

Unpacking and Assembly

The lathe is packed in 1 carton. Do not dispose of the packaging until the lathe has been fully assembled and tested, as it may be required for returns.

Unpacking:

• This process requires 2 people.
• Unpack the carton and remove all contents.
• Check that all loose items are present. If anything is missing, contact Charnwood.

The loose items typically include: Tool Rest Banjo, Rubber Foot, Carry Handle, Knockout Bar, Tail Centre, Drive Centre, Tool Rest, Service Tools, Spindle Spanner.

Mounting Location:

Decide where to mount your lathe. Ideally, the height of the spindle should be approximately level with your elbow when standing or sitting in a working position.

The lathe is heavy and stable enough for use without fixing to a base, provided the workpiece is not too large and is well balanced. For larger diameter blanks (6” plus) and unbalanced pieces, it is recommended to fix the lathe to a suitable stand or bench. In this case, do not install the rubber feet and mount directly using the threaded holes.

Assembly Steps:

Fit the Feet:

If bench mounting without permanent fixing, fit the four rubber feet into the four threaded holes in the underside of the lathe.

Assemble the Tool Rest:

1. Rotate the Tailstock Cam Lock Lever and slide the tailstock off the right end of the bed.
2. Line up the Tool Rest Banjo and rotate the Tool Rest Cam Lock Lever so the Clamping Plate is in its lowest position. Slide the Tool Rest Banjo onto the bed.
3. Fit the Tool Rest into the banjo and lock it in place using the Tool Rest Height Lock ratchet handle.
4. Refit the Tailstock.

Fit the Carry Handles:

Use a 5mm Hex key to remove 2 bolts from the end of the bed. Fit the handle and re-tighten the bolts. The carry handles also serve as onboard storage for accessories and service tools.

Remove the Faceplate:

1. Insert the Knockout Bar through the hole.
2. Use a hex key to undo the 2 grub screws.
3. Fit the Spindle Spanner over the flats.
4. Unscrew the Face Plate.

The faceplate has two locking grub screws that are important to engage when running the lathe in reverse direction.

Adjusting the Spindle Speed

The lathe features electronic variable speed control. Three speed ranges are achieved by changing the position of the drive belt on the pulleys.

To adjust the drive belt position:

1. Remove the bottom pulley access door by loosening the 4 bolts with a 3mm Hex key. Lift off the door.
2. Loosen the Belt Tension Locking handle.
3. Lift the Belt Tension Lever and tighten the locking handle.
4. Move the slack belt to the alternate set of pulleys. Always remove the belt from the larger pulley first.
5. Release the locking lever, apply light pressure to tension the belt, and then re-tighten the locking handle.
6. Close the belt cover and refit the pulley door.

The approximate speed ranges for each pulley set are:

• Left Hand Pulleys: 250 - 750rpm
• Centre Pulleys: 600 - 1700rpm
• Right Hand Pulleys: 1200 - 3550rpm

After switching on the lathe, adjust the speed using the variable speed control dial. The actual spindle speed is displayed on the Digital Read Out.

The control panel includes:

• Forward/Reverse Switch (FWD/REV)
• Variable Speed Control Dial (LOW/HIGH)
• On/Off Switch (STOP)

Recommended Turning Speeds

Forward / Reverse Direction

The Forward/Reverse switch should never be used while the lathe spindle is rotating. Always stop the lathe using the OFF switch and wait for the workpiece to come to a standstill before switching direction.

IMPORTANT: When turning a bowl, the lathe should only be used in reverse direction if the accessory mounted to the headstock spindle is locked onto the spindle with grub screws. Some chucks are not equipped with any form of locking and should never be used in reverse. The faceplate supplied with the lathe has two thread-locking grub screws.

Using the Lathe

Tailstock Adjustment:

Fine adjustment of the tail centre is made by undoing the Tail Centre Lock (by half a turn only). Then turn the Tailstock Handwheel to advance or retract the tail centre. It has a travel of 70mm. When fully retracted, the Tail Centre will be automatically ejected.

To slide the tailstock along the bed, rotate the Tailstock Cam Lock Lever. When positioned, clamp it firmly by rotating the lever back to the locked position.

Tool Rest Adjustment:

The height of the Tool Rest can be adjusted using the Tool Rest Height Lock. The lever for this adjustment can be rotated to a more convenient position by pulling it away from the thread to disengage the ratchet teeth, then rotating it.

The Tool Rest banjo can be slid along the bed of the lathe. To release it, rotate the Tool Rest Cam Lock Lever. The tool rest can then freely slide. When positioned, clamp it firmly by rotating the lever back to the locked position.

Using the Indexing System

The lathe is fitted with an indexing system allowing the spindle to be locked in any of 24 positions in a full 360° rotation, at 15° intervals. This facility is useful for fluted columns, clock faces, and accurate hole placements.

Operation:

1. Open the top belt pulley cover to expose the indexing ring.
2. Mark a convenient position on the headstock casting and turn the faceplate to align indexing position 1 with the mark.
3. Pull out and rotate the indexing pin until it springs forward and locks the spindle.
4. To move to the next position, pull out the indexing pin, rotate the spindle by hand until the next required number is aligned with the mark, and release the indexing pin to engage the lock.

IMPORTANT: The indexing pin should never be used as a spindle lock. To remove accessories from the spindle, always use the provided spanner to hold the spindle. Failure to do so may result in damage to the pin and indexing wheel.

Routine Maintenance

Replacing the Drive Belt:

The drive belt will eventually become worn and require replacement.

1. Use a 3mm Hex key to remove the bottom pulley access door.
2. Remove the chrome hand wheel from the spindle by unscrewing it. Hold the spindle with a spanner and unscrew the handwheel anticlockwise using the knock-out bar as a lever.
3. Use a 3mm Hex key to undo 2 of the 3 bolts on the cover plate to swing it away for access to the drive belt.
4. Open the top belt pulley access cover.
5. Release the tension on the drive belt.
6. Remove the old belt by feeding it out of the pulley access port.
7. Fit the new belt by following the instructions in reverse.

Ensure that the V-grooves of the belt are on the inside and correctly seated into the grooves on the pulleys.

Replacing the Motor Brushes:

The carbon brushes should be regularly inspected and need changing after approximately 500 hours of use, or when the block has worn down to a length of 7mm.

1. Remove the motor from the machine by removing the tension adjusting lever and the pivot bolt on the rear side.
2. Unscrew the two brush covers found on either side of the motor.
3. Withdraw the worn brush and spring, then replace it with a new one.

Always replace both brushes at the same time.

Troubleshooting Guide

Wiring Diagram

The wiring diagram illustrates the electrical connections for the Charnwood 1420V lathe. Key components include:

• Power Input: PE (Protective Earth), L (Live), N (Neutral)
• Switching: KJD20 (On/Off/Forward/Reverse Switch)
• Control Unit: Speed control board, Potentiometer, Fuse (FU), Digital display.
• Power Conversion: Rectifier bridge.
• Motor: DC Motor.

The diagram shows how the power supply connects through the switch and control board to the rectifier and then to the motor, with the digital display providing speed feedback.

Declaration of Conformity

Charnwood declares that the Woodworking Lathe, Model 1420V conforms with the following Directives:

• Machinery Directive 2006/42/EC
• EMC Directive 2014/30/EU

It also conforms with the following UK Regulations:

• Supply of Machinery (Safety) Regulations 2008
• Electrical Equipment (Safety) Regulations 2016

The machinery example conforms to the EC type examination Certificate No. AM 50387407, issued by TUV Rheinland LGA Products GmbH, Nurnberg, Germany.

This declaration confirms that the equipment has been tested and found to comply with the relevant specifications and essential requirements of the directives and regulations.

Signed: Richard Cook, Director

Dated: 08/02/2022

Location: Leicestershire

Symbols: UK ?? | CE Mark CE

Disposal Information:

Please dispose of packaging for the product in a responsible manner. It is suitable for recycling. Help to protect the environment, take the packaging to the local amenity tip and place into the appropriate recycling bin. ♻️

For EU countries: Do not dispose of electric tools together with household waste material! In observance of European Directive 2002/96/EC on waste electrical and electronic equipment (EEE) and its implementation in accordance with national law, electric tools that have reached the end of their life must be collected separately and returned to an environmentally compatible recycling facility. Your local refuse amenity will have a separate collection area for EEE goods. ?️

Parts List

The following is a list of parts for the Charnwood 1420V Lathe:

Part No. | Description

• 01 | Rubber Foot
• 02 | D.C. Motor
• 03 | Belt Tension Lock Lever
• 04 | Flat Washer
• 05 | Motor Plate
• 06 | Cap Head Screw
• 08 | Grub Screw
• 09 | Cap Head Screw
• 10 | Bed
• 11 | Belt Door
• 12 | Cross Head Screw
• 13 | Screw
• 14 | Cap Head Screw
• 15 | Flat Washer
• 16 | Carry Handle
• 17 | Cap Head Screw
• 18 | Spring Washer
• 19 | Headstock
• 20 | Digital Readout Sensor
• 21 | Location Pin Assembly
• 22 | Spindle Pulley
• 23 | Drive Belt 310J
• 24 | Headstock Wheel
• 25 | Locking Nut
• 26 | Knockout Rod Assembly
• 27 | Cover For Motor Pulley
• 28 | Cap Head Screw
• 29 | Grub Screw
• 30 | Bearing
• 31 | Circlip
• 32 | Bearing 6005
• 33 | Spindle
• 34 | Cap Head Screw
• 35 | Face Plate
• 36 | Drive Centre
• 37 | Revolving Tail Centre
• 38 | Sleeve
• 39 | Tailstock
• 40 | Quill Lock Lever
• 41 | Pin
• 42 | Leadscrew
• 43 | Tailstock Handwheel
• 44 | Handwheel Axle
• 45 | Washer
• 46 | Handwheel Handle
• 47 | Grub Screw
• 48 | Tailstock Cam Lock Lever
• 49 | Grub Screw
• 50 | Tailstock Clamp Bolt
• 51 | Clamping Plate
• 52 | Nut
• 53 | Circlip
• 54 | Cross Head Screw
• 55 | Cable Hook
• 56A | Tool Rest Stem 25mm Dia.
• 56B | Tool Rest Crossbar
• 57 | Circlip
• 58 | Tool Rest Banjo
• 59 | Tool Rest Height Lock
• 60 | Tool Rest Clamp Bolt
• 61 | Tube
• 62 | Tool Rest Cam Lock Lever
• 71 | Cross Head Screw
• 75 | RPM Digital Readout
• 77 | Spanner
• 78 | Allen Key 3mm
• 79 | Allen Key 4mm
• 80 | Allen Key 5mm
• 81 | Allen Key 12mm
• 82 | Knob
• 83 | Motor Pulley
• 84 | Motor
• 85 | Power Lead
• 86 | Circuit Board
• 87 | Connector for Motor Plug
• 88 | Connector for Power Lead
• 89 | Electrical Box
• 90 | Rubber Grommet
• 91 | Speed Controller
• 92 | Variable Speed Knob
• 93 | Box Cover
• 94 | Switch - KJD20
• 95 | Cross Head Screw
• 96 | Cross Head Screw
• 97 | FWD/REV Toggle Switch
• BRUSH | Carbon Brushes x2
• VS | Control Unit Complete (Parts # 86-94 + 96)

The document also includes a parts drawing which visually represents the assembly and location of these components.