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Breaded Electronics / Embedded » Home made Pick and place machine Place Mk2 » Miscellaneous hardware notes
Rotating Pneumatic fitting for top of A axis head stepper: Festo QSRL-M5-6 or Festo QSRL-M5-4
Stepper was 39BYG003 but it doesnt microstep very well at all even with gecko driver, so back to the Sanyo Denki SS2422
Static feeders on East side of machine:
Mount holes are 59mm down and at 40 & 120mm in, Countersunk 5mm screws
Using T5 belts, but there are more accurate / higher torque transmission belts out there:
Is 3M HTD a variation of 3M?
Some belts also have 'Non backlash' puleys using teh standard evbelts ie S8M
Useful: http://www.brecoflex.com/download/pulley_july08.pdf
Ok, I now have 2mm GT2 belts
Looks like GT2 2mm is the way to go.
If staying with direct drive then GT2 20 tooth is the smallest for an 8mm shaft & 4-5mm long grub screw as pulley OD is 12.2mm..
- with 0.9 deg stepper gives 400 / (20 * 2mm) = 10 full steps per mm before any microstepping.. so with a Gecko at 1/10 stepping is 100 steps per mm..
Supposedly you can use narrower belts... than earlier types..
8mm pillow block
http://bearingsdirect.com/store/index.php?l=product_detail&p=4251