| The Craftmans Shop > New from Old |
| The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20) |
| << < (174/260) > >> |
| awemawson:
Just to show I've not been idle, and have been actually USING the Beaver TC-20 here's a picture of two hundred parts I've run off for an acquaintance on another forum. One part is a taper adaptor and the other a simple spacer. It was a very useful leaning exercise, using the bar puller, and involved boring more soft jaws. Although 'spot on' soft jaws are still available they cost an absolute fortune. I was lucky enough to pick up eleven used sets on eBay that had the correct 1/16" by 90 degree serrations, but had M12 fixings on a closer spacing than the M16 originals, so this involved making stepped Tee Nuts to suit and re-machining the noses on the CNC mill to remove the existing curves prior to boring. I also had to make a custom spindle liner The exercise has made me think that a 'Tumbler' of some sort would be a useful addition to the workshop to de-burr parts like these that are very fiddly to do by hand. Has anyone built one? |
| hermetic:
I built this tumbler for my daughter, from an example on the internet, it is for rock polishing, so you would need to go up a few levels to get enough vibration, but any motor with an eccentric weight attached will do the biz.This uses a computer fan with a 10mm nut and bolt in one of the blades, and you can vary the level of vibration by using different sized bolts. |
| PekkaNF:
I concider building one, but bought case tubler - the type reloaders use with corn or peanut husk. Maybe if I had all parts, but would have not got it any cheaper - probably whole lot bigger. Brother has one of these: https://www.amazon.com/Lyman-1200-Sifter-Promo-Model/dp/B0063GS1Y2/ref=sr_1_1?keywords=Lyman+Pro+1200+Tumbler+%28230-Volt%29&qid=1565985760&s=gateway&sr=8-1 Bought this type (230V with proper Schuko), it is rather small, but works for me. https://www.academy.com/shop/pdp/frankford-arsenal-quick-n-ez-case-tumbler There is also a rotary type where stainless steel pins are used. Those tend to be bigger, more expensive and proper canditates for build. Tumbler is the easy part. Took a while to find a supplier for 5 + 5 kg of abrassive media. One for deburring (plastic loaded pyramids) and one for satining (small ceramic cylinders) and some tubling "oil". Pekka |
| mc:
I took the easy option and bought one of these - https://www.frost.co.uk/motor-parts-vibratory-tumbler-rust-remover-polisher-8kg/ as there was nothing else available that size for as cheap. I made sure buy the media elsewhere though, as Frost was really expensive for it compared to the industrial suppliers. |
| awemawson:
The Beaver developed a fault a few weeks ago but I've been too busy with other things to get stuck in, however today at last I had time. There is a Vogel 122-345-303 ET6900 automatic lubrication system that pumps way oil to the various sliding and rotating bits. Basically a pump on top of a 2.7 litre reservoir with a series of pipes and manifolds. It takes mains in, pushes oil out at times determined by an internal switch, and has a single feedback contact to the main CNC controller saying that all was well - there is also a manual button so that you can trigger the cycle on demand. Starting the machine up all would be well but after a few minutes it would report 'Lubrication Error' - sure enough the fault light would be on on the Vogel. Pressing the manual button would clear the fault and all would be well for a few more minutes. I was convinced that the oil level switch was faulty as it was measuring open circuit with a full tank, and the only literature that I could find, which was for a slightly later model, referred to the normally closed level switch. Should be easy enough to drop the reservoir from the main body and get at the float switch. Well it would be were it not for one allen bolt in a totally inaccessible position behind the control box. This meant the whole caboodle had to come off. Only five wires and a pipe so not too bad. Off comes the reservoir - slide the switch - no it's closed when the tank is empty (so NOT fail safe) so think again. Well there is an orange box inside that obviously is a custom made controller - a "Vogel IG 38" - again I can find details of later models but not this one :bang: Still nothing ventured nothing gained - take the tin opener to it - 'open the box' as Hughie Green used to say, and see what's inside. Answer, quite a bit of electronics on two PCB's - nothing much to raise eye-brows. More in hope than expectation I gently pryed out the one IC that was socketed, and re-inserted it and put everything back together so I could test it on the bench. Having blocked the oil out port with a suitable bolt darn me if it didn't actually work :clap: Time will tell if it was just oxidised IC contacts or if I've just scared the problem away for a while, but having re-installed the pump in the lathe she's now doing what she wouldn't do before :thumbup: |
| Navigation |
| Message Index |
| Next page |
| Previous page |