Hybrid_From_Hell Posted July 5, 2013 Author Share Posted July 5, 2013 Hmmmmm Well today saw me collect some scrap valuable parts for the project 1 x Deseasel <shudder> Flywheel from a fereelander, and a matching ferucked starter unit On the bench with a scrap P38 pinion / bearing / machine the daylights out of it and / or a Metric scrap stub axle / bearing / machine etc, I can see a possible working Table Unsure as to how to power, had the starter apart, burnt to a crisp, knocked the armatuer off on the anvil and I now have a nice drive shaft with bearings bottom and top (when machined) 2 x mounting holes from the starter and with the soleniod removed half neat. also being a High torque starter with 3 x gears the torque is increaed and the speed out less than 1:1 from the Drill I added to it as a start also good are the tapped holes and bolts for clamping down, yippee ! So, fabbing + lathework will be commencing, but still unsure how to power / control speed, so suggestions please ! I will have a vertical 12mm apprx shfat to couple too oooer missus Thoughts ?....and keep the solutions cheap please Nige Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted July 6, 2013 Author Share Posted July 6, 2013 Adding to the above as I have a 100 Ltr 3 HP air compressor and pipework all around the workshop, what could I convert / bodgificate using air ?????????Nige Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted July 6, 2013 Share Posted July 6, 2013 Well there is the air ratchet that someone mentioned earlier, but tbh the noise from it would get on my nerves..... I'd be going the cordless drill route EDIT: with air power don't forget to route the exhaust away from where you are working or you'll blow your shielding gas away. Quote Link to comment Share on other sites More sharing options...
simonr Posted July 6, 2013 Share Posted July 6, 2013 How anout just find an old mains drill with variable speed? Si Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted July 6, 2013 Author Share Posted July 6, 2013 Hmmm Bit of machining on the starter today Cut of soleniod, macnibned casing back, pressed armartuer off on pres, reduced shank of gear drive and then cut the starter tube housing down so new machined shaft has bearing each en and tigged gear into place fater gubbins removed from soleniod Ended up with a very short "Starter" mit reduction gearbox still in place, 2 x mountings for the unit to the base plate - and a short shaft to connect drive to .... So, power drive unit + some welding and fabbing ahead N Quote Link to comment Share on other sites More sharing options...
richp110 Posted July 8, 2013 Share Posted July 8, 2013 I have been searching for an affordable one for years!Was dropping off some scrap at scrapyard and one came tumbling out of a skip being emptied. (repaired dc control box)Make sure you have an earth that rubs on the chuck/platter or shaft. I considered hydraulic motor before I found this one. Your start looks good! Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted July 10, 2013 Share Posted July 10, 2013 I'd have the brushes out of the starter and use those. Quote Link to comment Share on other sites More sharing options...
Daan Posted July 10, 2013 Share Posted July 10, 2013 I'm surprised no one has mentioned a windscreen wiper motor.Again, all the advantages of DC drive (infinitely variable, reversible etc) and a big speed reduction built in. And cheap from a scrappy! I have actually seen windscreen wiper motors used in industrial machines. What I thought, in combination with the mentioned 12V train controller will give you all you need. Daan Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted July 10, 2013 Share Posted July 10, 2013 Something like this would do as a controller for a DC powered drill/wiper motor etc: http://www.ebay.co.uk/itm/12V-40V-10A-Pulse-Width-Modulation-PWM-DC-Motor-Speed-Control-Switch-Governor-UK-/121111837420?pt=UK_Computing_Other_Computing_Networking&hash=item1c32d3faec If you want foot pedal control then a TIG footpedal (which I'm sure you're familiar with) could be converted to replace the knob. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted July 10, 2013 Share Posted July 10, 2013 Only potential issue with a basic DC motor & controller is the lack of speed regulation - without some sort of feedback to keep a constant speed it might change speed as you load it. This is one of the advantages a stepper based system would have. For those who have no idea what I'm on about - it's like putting a brick on the accelerator and calling it cruise control, it will go at roughly the same speed as long as there's no hills. How much it would really vary is dependent on how beefy the motor/controller is for the size of the job. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted July 10, 2013 Share Posted July 10, 2013 Ah... takes me back to uni, closed loop control of motor speed, damping, overshoot etc. Then you get to play with closed loop positional control as well, all good fun But I agree, a stepper will be much more constant, even with feedback control there is likely to be an element of instability in the speed, stepper will completely overcome this as long as you aren't overloading it. Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted July 10, 2013 Share Posted July 10, 2013 Would it really need a feedback system? I wouldn't have thought of the loading as being particularly dynamic and if you were to have a foot pedal control you could adjust the speed on the fly, although that may get confusing controlling TIG current with one foot and table speed with the other .... Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted July 10, 2013 Share Posted July 10, 2013 Modify an RC servo for constant rotation? But yes, I agree - a stepper would give you more consistent speed control. Driving them for a constant speed rotation is a little more complicated. I'm not sure if there's anything that will do it out of the box. Certainly driver boards available from the likes of CNC conversions, but you'll need external circuitry to make it do what you want. If you want to go down the stepper route, I might have a proposal for you Nige. ;-) Quote Link to comment Share on other sites More sharing options...
landroversforever Posted July 10, 2013 Share Posted July 10, 2013 Modify an RC servo for constant rotation?But yes, I agree - a stepper would give you more consistent speed control. Driving them for a constant speed rotation is a little more complicated. I'm not sure if there's anything that will do it out of the box. Certainly driver boards available from the likes of CNC conversions, but you'll need external circuitry to make it do what you want. If you want to go down the stepper route, I might have a proposal for you Nige. ;-) 3.5 turns would be enough... so an RC sail servo would work. Not sure what the controls would think of the HF though? Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted July 11, 2013 Share Posted July 11, 2013 Driving them for a constant speed rotation is a little more complicated. I'm not sure if there's anything that will do it out of the box. You mean, like any of the eBay links I posted earlier in the thread? Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted July 11, 2013 Author Share Posted July 11, 2013 ^^which I have ordered, plus a cheap tattoo pedal box to see if I can get an on off switch having a 1 x TIG Torch + 1 x TIG Rod + 1 x TIG Pedal meant I still had one foot free .................... Nige Quote Link to comment Share on other sites More sharing options...
TheRecklessEngineer Posted July 11, 2013 Share Posted July 11, 2013 You mean, like any of the eBay links I posted earlier in the thread? Missed that! Quote Link to comment Share on other sites More sharing options...
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