I'm hoping to get into some of this kind of work this summer. I have a bridgeport with rotary that used to have a bandit controller. Its in a pile of pices that I took apart to bring home. It just needs some drivers and software. I'm also read some stuff about lithopanes and I'm interested in that. But the software was kindof expensive.
Hopefully I won't be working so many hours this summer and I can get that machine reasembled n making chips..
decide to go ahead with a Plastic Injection Machine
trying to keep the Auger as small as possible , ended up 25mm dia , a bit big( the larger the diameter the more force needed )
so plan on spinning it with a 1600oz stepper through a 8:1 planetary gear box , at around 100rmp it would equal 1 horse power
the plunge force will come from a 8inch air ram , ( 300mm travel )
should end up with a 200ml max injection volume
started cutting some patterns today
plan on casting it in bronze
the timber is Western Red Ceder , 7mm slats from slat doors ,glued together with a urethane , 33c with 90% humidity , today it even smelt like a sauna
Last edited by TopEndScraper; 02-12-2013 at 05:44 AM.
Man I wish I had that spindle!
Can you show me a better shot of the Z axis! I may be rebuilding mine!
What tibmer is that you are cutting? looks like Mahogany?
its just a CHINA EBAY CHEEPie (AU$2000)
the hoses and cable coming down , are the spindle cooling , and spindle power , just zip tied together , keeping them out of the small cable chain
i made a cupboard for the machine and all my electronics are above , in an upside down draw , the motor power runs through the cable chains
not the best set up , not so much the z axis , but the y axis is just 20mm unsuported rails , and there is a lot of flex ( still useable ) because of the yaxis set up , i will get around to changing that to an aluminium beam with supported rail's
timer was Western Red Ceder
Last edited by TopEndScraper; 02-12-2013 at 07:13 AM.
So how much Z lift do you have? Mine will lift 200mm (I have never used that much) I thinking of cutting it down a bit to take some weight out of it.
Im planning to rebuild my Y axis with hardened 30mm round bar with linear bearings.
Are you cutting that pattern as we speak??? it looks like you are a bit further along with it???
Last edited by nudge; 02-12-2013 at 07:23 AM.
100mm z axis , i normally run 2 scarifical sheets so 60mm , the bottom sheet has been leveled , then just throw a scarifical sheet on top
if you want to cut aluminium , ( mine dose slowly ) i would say , a beam with supported rails for y axis , and double screw x axis
the longer the z axis , the more force / leverage on the yaxis rails
huge z axis is fine , but how far out does your bit stick out of the spindle , nice to do detail on 150mm beams , but the higher it is , the more flex is there
Last edited by TopEndScraper; 02-12-2013 at 07:25 AM.
if i was to make a new one ,i would go with this design http://www.woodworkforums.com/f170/6b4-143000/
the side beams with the yaxis running right on top of those beams, cutting deck hanging off those beams , well supported y axis , its a nice design
i would machine up some patterns and cast the beams , with web trusses
yes cutting more patterns at the moment , the tip for the auger , and it needs a sliding valve ,
Last edited by TopEndScraper; 02-12-2013 at 07:42 AM.
Im not a member on that forum so I cant see the pics
The entire Z moves up and down
I can sit my small wood lathe under the Z and cut the same part over and over!
Last edited by nudge; 02-12-2013 at 07:49 AM.