TM Cobra Magnetic Drilling Machine Models CM/200/1 & CM/200/3 OPERATOR’S MANUAL Rotabroach, Imperial works, Sheffield Road, Tinsley, Sheffield S9 2YL. England. Tel: (++44) 0114 221 2500 Fax: (++44) 0114 221 2560 Email: info@rotabraoch.co.uk Web: www.rotabroach.co.uk A MEMBER OF THE OSL GROUP OF COMPANIES This machine (Serial No RLL233 ) is CE approved.
RLL233 Issue 4 Aug 2007 CONTENTS OF THE MANUAL. Page [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] Specification of machine. General procedures and safety measures. Operating instructions. Extension cable selection. Mounting of cutters. Cutters and pilots. Remedies for hole making problems. Wiring diagram. Exploded view and component parts of complete machines. Exploded view and component parts of gearbox and motor units. Pipe adapter kit. Wiring of mains plug. Cutting Speeds.
RLL233 [1] Issue 4 Aug 2007 ROTABROACH MAGNETIC DRILLING MACHINE MODELS CM/200/1/ & CM/200/3 Maximum hole cutting capacity in .2/.3C steel = 65mm dia. x 50mm deep Arbor bore = 19.05mm (3/4") dia. Motor Unit Voltages normal full load Electro Magnet Size 110v 230v 14 A 1400 W 6 A 1400 W 0.6A 69W 0.3A 69W 180mm long 90mm wide 1200kgs Tractive Force at 20°C with 25mm minimum plate thickness The use on any material less than 25mm thick will progressively reduce the magnetic performance.
RLL233 Issue 4 Aug 2007 READ BEFORE USING THE MACHINE [2] SAFETY PROCEDURES • When using electrical tools, basic safety precautions should always be followed to reduce the risk of electric shock, fire, and personal injury. • Do NOT use in wet or damp conditions. Failure to do so may result in personal injury. • Do NOT use in the presence of flammable liquids or gases. Failure to do so may result in personal injury. • ALWAYS SECURE THE MACHINE WITH THE SAFETY STRAP - PART NO.
RLL233 • Issue 4 Aug 2007 On completion of the cut, a slug will be ejected. DO NOT operate the machine if the ejected slug may cause injury. [3] OPERATING INSTRUCTIONS • Keep the inside of the cutter clear of swarf. It restricts the operating depth of the cutter. • Ensure that the coolant bottle contains sufficient cutting oil to complete the required operating duration. Refill as required. • Occasionally depress the pilot to ensure cutting fluid is being correctly metered.
RLL233 Issue 4 Aug 2007 SPEED SELECTION The machine is equipped with two speed ranges, High, and Low, and a stepless variation of each range. The speed range is changed by the rotary change switch located on the gearbox side. Do not change gear while the motor is in motion. The stepless variation is adjusted by rotating the disk located on top of the motor. The disk is graduated into six numerically designated segments.
RLL233 Issue 4 Aug 2007 [6] CUTTERS AND PILOTS Cutter & Pilot relationship. Cutter designation. RC, RCV Diameter. 12 13 -18 19 - 52 Pilot type.
RLL233 [7] Issue 4 Aug 2007 REMEDIES FOR HOLE MAKING PROBLEMS Problem Cause Remedy 1) Magnetic base Material being cut may be too Attach an additional piece of metal won't hold effectively thin for efficient holding of under work-piece where magnet will magnet be located, or mechanically clamp magnetic base to work-piece Swarf or dirt under magnet Clean magnet Irregularity on magnet face or Use extreme care, file only work-piece imperfections flush to surface Insufficient current going to magnet dur
RLL233 Issue 4 Aug 2007 Problem Cause Remedy 3) Excessive drilling Incorrectly re-sharpened, pressure required worn or chipped cutter Re-sharpen or replace Coming down on swarf lying Clean work-piece. Take care not to on surface of work-piece start a cut on swarf 4) Excessive cutter breakage Gibs out of adjustment or lack of lubrication Lubricate gib and/or adjust grub screws Swarf accumulated (packed) inside cutter Clear cutter Incorrect speed selection. Select appropriate speed.
RLL233 [8] Issue 4 Aug 2007 WIRING DIAGRAM 9
RLL233 [9] EXPLODED VIEW OF COMPLETE MACHINE Issue 4 Aug 2007
RLL233 Item 1 1.1 1.2 1.3 1.4 1.5 2 2.1 2.2 3 3 3.1 3.2 3.3 3.4 3.5 4 4.1 4.2 4.3 4.4 4.5 5 5.1 5.2 6 5 6.2 6.3 6.4 6.5 Issue 4 Aug 2007 [9] Parts list for CM/200/1 & CM/200/3 Component Part No.
RLL233 [10] EXPLODED VIEW OF GEARBOX AND MOTOR UNITS Page 12 Issue 4 Aug 2007
RLL233 Issue 4 Aug 2007 Part list of motor & gearbox(Cobra) Item Component Part No. Item Component Part No. Item Component 1 1 Motor assembly (110v) Motor assembly (230v) RD25521 RD25523 3.7 Speed controller assembly (110v) 3.7 Speed controller assembly (230v) RD23330 RD23343 2 Armature assembly (110v) RD25531 3.8 Screw RD45501 8 Gearbox assembly RD25506 2 3 Armature assembly (230v) RD25533 RD25561 3.9 End cap 3.
RLL233 Issue 4 Aug 2007 [11] PIPE ADAPTOR KIT RD2311 FITTING INSTRUCTIONS • Dependent upon the size of the pipe to be cut (see illustrations) attach adjustable angle plates RD3328 with cap screws RD4325 and washers RD4205 (4 off each) to the magnet sides. Do not tighten. • Locate the machine on the centreline pipe taking care that the magnet is in line with the longitudinal axis of the pipe. • Switch on the magnet and move the sliding plates down to the outside diameter of the pipe.
RLL233 [12] Issue 4 Aug 2007 WIRING OF MAINS PLUG The wires of the mains lead are coloured in accordance with the following code: GREEN and YELLOW EARTH BLUE NEUTRAL BROWN LIVE As the colours of the mains lead of this appliance may not correspond with the coloured markings identifying the terminals in your plug - CONNECT AS FOLLOWS; • The wire coloured GREEN and YELLOW must be connected to the terminal marked E or marked by the earth symbol or coloured GREEN or GREEN and YELLOW • The wire colou
RLL233 Issue 4 Aug 2007 13] CUTTING SPEEDS. Typical cutting speeds (RPM) for various materials Cutter dia 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 9 239 220 205 191 179 168 159 151 143 136 130 125 119 115 110 106 102 99 95 92 90 87 84 82 80 77 75 Surface speed.
RLL233 Issue 4 Aug 2007 Cutter diameter and speed relationship Selector No 1 2 3 4 5 6 High gear. RPM 300 360 430 500 600 650 Cutter Dia. 32 26 22 19 16 14 Selector No 1 2 3 4 5 6 Low gear. RPM 150 180 215 250 300 330 Cutter Dia. 62 52 46 38 32 30 This data is presented for guidance only, and should be adjusted to suit site and material conditions.
RLL233 Issue 4 Aug 2007 [14] REPLACEMENT OF MOTOR SUPPLY CABLE. TO REMOVE OLD CABLE AND CHAIN Ensure that the machine is disconnected from any source of power. Failure to do so may result in personal injury. • Remove screws #73 and withdraw the control unit from the housing. • Disconnect the nine-pin cable connector from the control panel • Remove the motor supply cable leads (8 and 9) from the terminal block by unfastening the screws. • Release the cable clip inside the housing cavity.
RLL233 Issue 4 Aug 2007 The replacement is a complete factory produced assembly, and RD272 (230v) is illustrated below. TO REMOVE OLD CABLE FROM MACHINE • The machine MUST be disconnected from any source of power supply before attempting to conduct any maintenance work. Failure to do so may result in personal injury. • Remove control unit by unfastening screws #73 and lifting the unit clear of the housing. • Remove the 9-pin connector block on the rear of the control unit.