Difference between revisions of "DIY Laser/XY Gantry"
m |
|||
(15 intermediate revisions by 5 users not shown) | |||
Line 1: | Line 1: | ||
+ | {{Archive|date=January 2013}} | ||
− | + | =Background= | |
− | |||
RussleH and [[User:Lwk|'RepRap' Matt]] ([[User talk:Lwk|talk]]) took a look at the work is of the IMP Pick and Place at Ciseco<br/> | RussleH and [[User:Lwk|'RepRap' Matt]] ([[User talk:Lwk|talk]]) took a look at the work is of the IMP Pick and Place at Ciseco<br/> | ||
− | |||
− | |||
Locking a magnetic tape linear encoders, simlar to used on the PnP<br/> | Locking a magnetic tape linear encoders, simlar to used on the PnP<br/> | ||
Line 11: | Line 9: | ||
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 working area 600mm x 900mm | ||
+ | |||
+ | Speed: | ||
+ | *1000m/s for scan (X axis) | ||
+ | *500mm/s for Y axis | ||
+ | |||
+ | Precision: | ||
+ | *0.01mm | ||
+ | |||
+ | =Type of Gantry= | ||
Possible driver systems | Possible driver systems | ||
Line 19: | Line 29: | ||
* fixed motor driving a ballscrew | * 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 | ||
+ | *Standard | ||
+ | *Motors can be smaller (less inertia) | ||
+ | *Most low cost and DIY lasers use this method | ||
− | + | ===Disadvantages=== | |
+ | *Precision will get worse (belt wear) | ||
+ | *Not repeatable precision (belts will stretch if moving fast) | ||
− | + | ===Belt Drive costs=== | |
− | * | + | *XY gantry for DIY laser is available here for $950 (=£590). The cutting size/ working area is 900mm x 600mm. This comes with 2 x 5A motors. |
− | + | http://www.lightobject.com/XLE-900600-XY-Stages-complete-kit-for-DIY-CO2-Laser-2-yrs-warranty-P762.aspx | |
− | |||
− | + | ==Ball Screws== | |
+ | More information on ball screws can be found here: | ||
− | + | *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 | ||
+ | *Repeatable precision for its whole lifetime | ||
+ | *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 | ||
+ | *Higher cost | ||
+ | *Larger motors required (more inertia) | ||
===Ball Screw costs=== | ===Ball Screw costs=== | ||
+ | These prices have come from Zapp Automation (http://www.zappautomation.co.uk/en/). This is not necessarily the lowest cost. | ||
+ | |||
+ | Parts required include: | ||
+ | |||
+ | Ball screw 25mm diameter, 25mm Pitch: | ||
+ | *2 x 600mm @£6/100mm = £72 | ||
+ | *1 x 900mm @£6/100mm = £54 | ||
+ | |||
+ | End mounts: | ||
+ | *3 x floating 25mm diameter @£30 = £90 | ||
+ | *3 x fixed 25mm diameter @£60 = £180 | ||
+ | |||
+ | Ball Nuts: | ||
+ | *3 x R25-25A2-FSED @£75 = £225 | ||
+ | |||
+ | *3 x Motor couplers @£10 = £30 | ||
+ | |||
+ | Ground bar | ||
+ | *1 x 1m length @£1.20/100mm = £12 | ||
+ | *1 x linear bearings = £4 | ||
+ | |||
+ | Total cost = £667 | ||
+ | Notes: | ||
+ | Supplier of ball screws and parts: | ||
+ | *http://www.misumi-europe.com/index.aspx?lang=EN&fn=sub11_3.aspx&mu=06&css=L2&ref= | ||
+ | *http://stores.ebay.com/linearmotionbearings/ | ||
− | + | =Type of Motor= | |
+ | Motors for each of the above could be one of the following | ||
+ | * DC motor | ||
+ | * stepper motor | ||
+ | * brushless servo motor |
Latest revision as of 00:06, 20 February 2019
![]() |
The information on this page is NOT current. It retained for historical or archival purposes only. (January 2013) |
Background
RussleH and 'RepRap' Matt (talk) took a look at the work is of the IMP Pick and Place at Ciseco
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 working area 600mm x 900mm
Speed:
- 1000m/s for scan (X axis)
- 500mm/s for Y axis
Precision:
- 0.01mm
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
- Standard
- Motors can be smaller (less inertia)
- Most low cost and DIY lasers use this method
Disadvantages
- Precision will get worse (belt wear)
- Not repeatable precision (belts will stretch if moving fast)
Belt Drive costs
- XY gantry for DIY laser is available here for $950 (=£590). The cutting size/ working area is 900mm x 600mm. This comes with 2 x 5A motors.
Ball Screws
More information on ball screws can be found here:
Advantages
- High precision
- Repeatable precision for its whole lifetime
- 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
- Higher cost
- Larger motors required (more inertia)
Ball Screw costs
These prices have come from Zapp Automation (http://www.zappautomation.co.uk/en/). This is not necessarily the lowest cost.
Parts required include:
Ball screw 25mm diameter, 25mm Pitch:
- 2 x 600mm @£6/100mm = £72
- 1 x 900mm @£6/100mm = £54
End mounts:
- 3 x floating 25mm diameter @£30 = £90
- 3 x fixed 25mm diameter @£60 = £180
Ball Nuts:
- 3 x R25-25A2-FSED @£75 = £225
- 3 x Motor couplers @£10 = £30
Ground bar
- 1 x 1m length @£1.20/100mm = £12
- 1 x linear bearings = £4
Total cost = £667
Notes: Supplier of ball screws and parts:
Type of Motor
Motors for each of the above could be one of the following
- DC motor
- stepper motor
- brushless servo motor