Electrical Control Complexity: A major benefit of DC drive-trains used to reduced electrical setup complexity. The slots I milled in the mounting plate for the DC motor. There is a belt change option on the drive train to expand the speed range but in all the years I’ve had it I’ve never used it. To verify the presence of nonlinear blocks in Simscape plant model, enter: simscape.findNonlinearBlocks('ee_dc_motor_control_original') Found network that contains nonlinear … Press the PRG/RESET button to enter programming mode. I wired up my own control circuitry, this allowed me to use additional features of the inverter (photo 14), note that I have now replaced the rather thin control wires with thicker ones. Almost everything is done on RJ45. I will show how I programmed the inverter to enable this external potentiometer shortly. This gave me a six-speed drive, or twelve speeds with the 2:1 built in ‘back gear’. by Torch » Mon Apr 27, 2015 11:24 am, Post It has better performances than other traditional dc motors. 24V (PLC) runs to the normally closed (N/C) stop switch. A steel bar, tensioned by a screw with a tommy bar, runs to the base of the lathe allowing the belt to be kept tight or loosened for pulley changes. I would suggest the latter, for simplicity and flexibility, noting that the inverters rated demand is less than six amps from the supply. 95. The jog mode selector switch is simply an on/off toggle switch connected between X2 and PLC. In particular, the slow speeds needed for such work reduce the ability of the motor’s built in fan to keep it cool. I have another little mitsubishi 200W motor and MR-J2 control for the X and I am looking for a 400 to 750w motor for the Z. Second, there is a lot of bang for the buck. Emergency stop or limit switches can be connected between PLC and X3. My wiring diagram is shown in figure 1, together with a basic parts list in Table 2. My inverter produces a 240V 3-phase output. Speed monitor is the default, showing output frequency. And the power factor of the DC voltages always remains 1. by LX Kid » Mon Apr 27, 2015 6:23 pm, Post I connected the 10V potentiometer supply (terminal 13) to the clockwise end (so that 10V is full speed). by chucketn » Mon Apr 27, 2015 11:05 am, Post Once you have the correct option letter, press FUNC/DATA. Lathe Modification: Variable Speed Treadmill DC Motor. The terminals X1, X2 and X3 are used to control various functions by means of connecting them to either CM or PLC. The relay is rated 250V AC 0.3A, or 48V DC 0.5A. I had not changed any function codes, so RUN started the motor and STOP (believe it or not) stopped it. For the mains supply, I used an ordinary 13-amp plug on a heavyweight lead. I understand many users like a prompt stop, but that a time less than two seconds can cause overvoltage tripping, requiring a reset to be carried out. 350(w)/261.8(rad/s) = 1.34(Nm). The 350w motor runs at 2500(rpm)=261.8(rad/s). Photo 6: The Hoover motor's information plate. A better sequence might have been to fit the motor to the lathe at the beginning, as this would have allowed more thorough testing as I went along. This would let me get the absolute best out of the lathe, particularly as the constant-torque characteristic of a VFD drive would be ideal for low-speed work. My Clarke CL300M mini-lathe was my first lathe (photo 1). A DC motor offers its maximum torque at low RPM where you need it most, so the full speed horsepower rating of an AC/DC motor can be a little deceiving as far as offering practical, usable power. Century formerly AO Smith GF2054 1/2 hp, 1725 RPM, 115 volts, 48/56 Frame, ODP, Sleeve Bearing Belt Drive Blower Motor. If you just want to check the data in the inverter and avoid editing it by mistake, you can go through the menu 1 function code letters, to menu 2. I don't know squat about motors and controllers. Be nice not to have to mess with the belt changes. Mini Lathe SC2 With brushless Motor - resulting in maximum torque and quiet operation in all speed ranges Engine lathe with new powerful brushless Motor. These can be used to control a transistor switch or a changeover relay. Others are tied up with industries need for quality control and process monitoring – for example reporting on the lifetimes of various components, or how long a cooling fan has been running. Then I realised that I had a lovely old 1/3 HP Hoover Motor (photo 3), perhaps fifty years old, given to me by a colleague who had once run a business installing motors several hundreds of times as powerful!). Turn on the inverter, it will enter ‘running mode’. F07 (acceleration time) and F08 (deceleration time) are self-evident, you may feel the default 6.00 seconds is to long. For good things you have to pay good I used the original DC motor of my lathe for the spindle. This approach has the advantage of retaining the 2:1 reduction provided by the existing toothed belt drive from the motor to the spindle and the high/low gearbox in the headstock. [1] Stan Bray, Useful Workshop Tools, Workshop Practice Series No. With this I made a pair of basic pulleys. The speed of the motor in jog mode is controlled by the number programmed into C20 (jog frequency). Transwave recommended a TEC unit rated at 0.37Kw at 230V, 50Hz, delta configuration (photo 11). It has covers that can be easily removed, without tools, to expose live wires. This assembly completely replaces the motor, having the toothed drive pulley fitted to the outboard end and a suitable pulley (or pulleys) for the drive from the motor in the middle. I’m sorry to hedge around this article with so many warnings, but here is one more: Before wiring the inverter realise that its live parts are not made inaccessible in the same way as a piece of domestic equipment. I had to rewire my shop to connect it to 230V. The way I have arranged my system is as follows. This sets the ‘hold function’ and keeps the motor running when the momentary start signal is disconnected from FWD or REV as long as X1 is disconnected from PLC. BEMONOC 775 DC Motor 12V 12000RPM Lathe Press With Miniature Hand Drill Chuck & Bracket High Speed 775 DC Motor For DIY Assembly. Emergency Stop - cuts all power to the motor immediately. I would think anything more than 1.25 or 1.5 hp would be a waste if the stock motor is 3/4 hp. There was one worrying moment – on the ME forum someone reported that an almost identical motor caught fire as the rubber insulation on the wires had perished. The DC motor also offers smoother and quieter operation. This is not essential, and with bigger, heavily braked, motors its can cause overvoltage tripping, but it is needed for some of the very advanced motor features (which I will not describe). Transwave sell ‘remote pendants’, but being on a budget and confident I had most of the requisite bits already, I asked about making my own and after querying my level of electrical experience, they said I should be quite capable of making my own, and so it turned out. A constant voltage and hence the speed of about 1750 rpm as described earlier at 24v 10A=! Slide feed screw, and a LED tachometer with Hall effect sensor knob and turn the dimmer to countershaft. Switches or an emergency stop or limit switches can be used to make, three …... That has a 1.25 HP motor lathe running under inverter power changing belts to change speed w ) (... Though, I could fit in it think the KBWT-112 ( 12 amp rating ) be! Wear a face shield to protect yourself a bore more gently I milled in the.. 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