Difference between revisions of "DIY Laser/XY Gantry"
| Line 41: | Line 41: | ||
==Belt Drive== | ==Belt Drive== | ||
| + | |||
| + | ===Advantages=== | ||
| + | *Low cost | ||
| + | |||
| + | ===Disadvantages=== | ||
===Belt Drive costs=== | ===Belt Drive costs=== | ||
| + | *XY gantry for DIY laser is available here for $950. The cutting size is 900mm x 600mm | ||
| + | |||
==Ball Screws== | ==Ball Screws== | ||
More information on ball screws can be found here: | More information on ball screws can be found here: | ||
| − | |||
| − | http://www. | + | *http://www.cnczone.com/forums/linear_rotary_motion/8813-ballscrew_basics.html |
| + | *http://www.nskamericas.com/cps/rde/xbcr/na_en/Ball_Screw_Tutorial.pdf | ||
| − | === | + | ===Advantages=== |
| + | *High precision | ||
| + | *Used in commercial designs | ||
| + | *Unusual and interesting - not been done for table top lasers before. | ||
| + | ===Disadvantages=== | ||
| + | *Need to build this with high precision | ||
| + | *No DIY design available | ||
| + | ===Ball Screw costs=== | ||
| − | + | Parts required include: | |
Revision as of 18:08, 17 October 2013
RussleH and 'RepRap' Matt (talk) took a look at the work is of the IMP Pick and Place at Ciseco
Pictures here
https://www.dropbox.com/sh/bhjxykpmvo0xxca/QPXxOIEow-/IMP
Locking a magnetic tape linear encoders, simlar to used on the PnP
This can give very high accuracy position feed back and at high speed
http://www.machine-dro.co.uk/digital-readout-systems/magnetic-tape-linear-encoders.html?p=1
Possible driver systems
- Fixed motor and looped belt to carriage
- Carriage mounted motor and fixed belt
- fixed motor driving a leadscrew
- fixed motor driving a ballscrew
Motors for each of the above could be one of the following
- DC motor
- stepper motor
- brushless servo motor
What speed do we need?
- for cut
- for none cut moves
- for etch/scan
Type of Gantry
There has been discussion over the XY gantry system.
There are two main ideas:
- Use a belt drive
- Use ball screws
Most lower cost laser cutters use belt drives.
Most larger machines use ball screws.
Here are notes on the two ideas:
Belt Drive
Advantages
- Low cost
Disadvantages
Belt Drive costs
- XY gantry for DIY laser is available here for $950. The cutting size is 900mm x 600mm
Ball Screws
More information on ball screws can be found here:
Advantages
- High precision
- Used in commercial designs
- Unusual and interesting - not been done for table top lasers before.
Disadvantages
- Need to build this with high precision
- No DIY design available
Ball Screw costs
Parts required include: