Difference between revisions of "DIY Laser/XY Gantry"
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http://www.machine-dro.co.uk/digital-readout-systems/magnetic-tape-linear-encoders.html?p=1 | http://www.machine-dro.co.uk/digital-readout-systems/magnetic-tape-linear-encoders.html?p=1 | ||
| + | =Specifications= | ||
| + | Size: Minimum 600mm x 900mm | ||
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| + | Speed: | ||
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| + | *1000m/s for scan (X axis) | ||
| + | *500mm/s for Y axis | ||
| + | |||
| + | =Type of Gantry= | ||
Possible driver systems | Possible driver systems | ||
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* fixed motor driving a leadscrew | * fixed motor driving a leadscrew | ||
* fixed motor driving a ballscrew | * fixed motor driving a ballscrew | ||
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Most lower cost laser cutters use belt drives. | Most lower cost laser cutters use belt drives. | ||
Most larger machines use ball screws. | Most larger machines use ball screws. | ||
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Here are notes on the two ideas: | Here are notes on the two ideas: | ||
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Parts required include: | Parts required include: | ||
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| + | =Type of Motor= | ||
| + | Motors for each of the above could be one of the following | ||
| + | * DC motor | ||
| + | * stepper motor | ||
| + | * brushless servo motor | ||
Revision as of 12:12, 18 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
Specifications
Size: Minimum 600mm x 900mm
Speed:
- 1000m/s for scan (X axis)
- 500mm/s for Y axis
Type of Gantry
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
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:
Type of Motor
Motors for each of the above could be one of the following
- DC motor
- stepper motor
- brushless servo motor