Setting this discussion up to gather up and brainstorm ideas.
LIST OF EQUIPMENT AND MATERIALS UNDER CONSIDERATION:
Materials to be Used:
Some design considerations:
Everyone feel free to inject any comments. This is your chance to provide input on what features go into the DIYDrones CNC Machine!
Current Bed Size:
Currently we're thinking the bed size will be 18x24 inches.
Insights from bGatti:
Some observations I can offer from experience:
1. Inexpensive skate bearing are not well sealed, and will likely stick if exposed to wood dust.
2. The most vibration on my machine is twist across the gantry - so make the gantry height ~twice the height of the lower extremity (from the table).
3. Parallel ports are increasingly harder to find - especially on laptops.
4. It doesn't take a lot of power to move a cnc machine - you will probably want to turn down the power to avoid breaking bits / bending the spindle shaft anyway - so don't specify a motor system which is stronger than your specified spindle. Anything which can be cut quickly on a strong machine, can be cut slowly on a lesser machine. $1000 is a lesser machine.
5. I have a wooden bed; I'd love an aluminum bed, but with $1000 to spend, the wooden bed isn't my biggest challenge. (It's gantry twist and probably runout for PCB Boards).
6. 3D printers want speed more than brute rigidity - most blogs on the subject of hybrids concede this point - which said - there are many parts which can be made slowly - but some parts call for a flying buttress - which does depend on a certain rate of speed.
Sounds good. If you need money for tests just shout.
Doesn't the UHU site sell the boards themselves? Or you need other boards done?
Ok, I converted the BOM to an excel file and uploaded it to this discussion. Where should get get the parts quotes from, do you think?
Ok, I'll go to digikey and do a search, fill in the prices tomorrow.
Also, I'll see if my guy at SOC Robotics is interested in making the UHU board for us.
You reserve me one my friend, I am really committed to get this one!
Steet bed all the way! (shipping will be a bitch but no choice!)
Can you send links to buy the caliper and dial indicator? I can start buying stuff!
tried to edit my post...
found some that I would like to get your blessing... :)
I guess we need the magnetic base too (cant find one yet in Canada... still looking)
Canada found! $20
12 inches better? (too long?) I guess the longer the better....
good one? (trying to source from Canada.... ) $34
good one? $20CDN
Total of the above is $75 from Amazon.ca... will still look around for best price and report here if I find anything.
hahaaha Start shipping the steel plates using your girlfriend!
That sounds quite interesting offer.
Burlington is only like 40Km from me... a nice hour drive to save a lot of shipping cost.
Do you think we will have the machine done by then? 1 month away only? hehe I dream about this moment!
Something is strange today with the forum... my post got cut in half..
I was saying this: I am in a mood to spend money on tools...
Monroe, what else could we need? Can you list the tools that might be obvious for you like a hammer is for a home builder but that we (non-machinist but soon to be apprentice) would need.
That would be nice!
I could cut myself one when I have the CNC! :)
found this nice little kit...
Man, I gotta get caught up on what you guys are doing.
Ok, I've contacted my guy at SOC Robotics, to see if he's interested in making this board and supplying us the motors and encoders too. It think this is the way to go, if we want to use this UHU board. My impression is that it's a little too DIY for most people to source the parts themselves, and assemble it. I'm having a hard time figuring out all those "footprint" numbers myself and match them with Digikey parts. I'm going to open a new discussion to gauge people's interest in getting this CNC machine, so I can provide a educated guess of the number of boards SOC Robotics might need to make.