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15-06-2016 #1
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15-06-2016 #2
You can run both X axis screws with one motor and belt connecting them,it's common practice with the guys on the forum.
Good luck
Mike
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15-06-2016 #3
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15-06-2016 #4
You can get custom belts but they are more expensive, but you have a lot of leeway length wise as you will have adjustment on the motor and your tension/routing belt layout. there was a post on the forum a while ago showing a belt routing setup to address this issue.
Regards
Mike
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15-06-2016 #5
Ok. Z AXIS design time. What is the acceptable leverage ratio of a sturdy Z?
My length of linear rail is 450mm. I was hoping for 300mm
Of cutting depth but it seems like there would be excessive difficulty keeping my Z cutting straight with a 150mm (1/3 ratio) binding area for the spindle on a 450mm run. What do you all suggest?
Also, would be wiser to mount the linesr bearings on the spindle plate or on the gantry plate?
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18-06-2016 #6
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29-06-2016 #7
Few more updates. a redesign of the Z axis and some major work to keep it all straight. moves very smoothly now. Z axis is 6mm steel. working on the ball screws next.
Here's a quick vid of the movement: https://youtu.be/DRLe3EPQ01M
Here's some photos.
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The Following User Says Thank You to Slixxor For This Useful Post:
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07-08-2016 #8
OK, so progress has been slow but i've finalized and purchased the electronics.
PSU's: 70v 5.7A Switchmode PSU.
Drivers: 2MA860H.
Motors:
Manufacturer Part Number 23HS45-4204S Step Angle 1.8° Holding Torque 3.0Nm(425oz.in) Rated Current/phase 4.2A Phase Resistance 0.9ohms Recommended Voltage 24-48V Inductance 3.8mH±20%(1KHz) Weight 1.8kg
Thanks to CliveS and the others on suggesting not buying a kit.
More to come shortly. there have been some more changes :)
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20-12-2016 #9
Z Axis finally fitted and relatively smooth with motion (No racking), Some filler welds will be done in the coming days and the wiring should be done shortly. :) I'm finally starting to see it all come together. I wasn't really sure if my Z design would work, but it seems extremely rigid. Although I've lost 100mm of travel on the Y axis I've maintained a good center of gravity on the Z axis and increased the X axis work area.
Hopefully cutting in January!
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