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Ok worked al little with Fred from BST.Quote:
Originally Posted by driftspin
Something changed in their design / stock
Earlier they would ship sealed bearing and sealed blocks... In mine neither are sealed.
Fred agreed to send me new seals block vs ballscrew.
Now waiting for postman[emoji4]
Grtz Bert.
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Makes you wonder why they would even bother putting the block together with unshielded bearings?
Well he said it had something to do with a bulk order from a client and complaints about resistance from double seals and getting things mixed up.Quote:
Originally Posted by Davek0974
Anyway i am glad i bought from him instead of some shady guy. Its a big advantage you guys know trust worthy sellers.
It is not how someone makes a mistake, its the way they solve stuff that sets them apart.
Grtz Bert.
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So.... i am working on z axis.
Hope to get it done soon though there is not a lot off spare time to play.
After that ... steppers belts pullies
I still have room in the design to go single or twin motors on the X axis.
I modified the motorcalcs.XLS to compensate for belt reduction 1:2 ballscrew 2010 vs stepper RPM.
Basicly 20N cutting forces @ 2300mm/min
Plenty?
5+ m/min rapids
I split the estimated total weight of the gantry for dual stepper setup calculation.
All looks acceptable in there.
So I am now half convinced twin 4nm nema23 will work ok.
But did not have no irl inertia data or torque curve for the cnc4u 4nm nema23.
uc300 has been on my mind since day 1.
Slaved x axis homing is also feature of uc300.
What questions do i need to answer to make a final choice here?
Any input is welcome .. i am not sure how to move on from here.
Grtz Bert.
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Hi all,
Picked up an empty controls cabinet today
500x700x150.
Will it do?
Grtz Bert
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More than enough space.!Quote:
Originally Posted by driftspin
Provided you choose the Ethernet version then you won't go wrong with UC300 but to get best from it you need decent breakout board like the Ub1.Quote:
Originally Posted by driftspin
Decided and ordered.
Its gonna be 4 steppers
4x 4amp 4Nm nema23 All round : cnc4you
Does anybody have a realistic number on power needed for those?
I would like to do a dual diy toroidal transformer setup.
So 2 dual 24v transformers , dual rectifier.
dual 68volt circuit.
1 for dual x motors and
1 for the y and z motor.
Is it as simple as 2x4 Amp stepper, so 8 to 10 Amp 400 to 500VA per transformer?
Or will less power be sufficient?
1 kW sounds like a lot and ott.
I gues not many times all 4 steppers are running full throttle all the time...
Anyone?
Grtz Bert.
Also ... is there such a thing as minimum belt length?
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I would go with a 600W psu for 4 x 4Nm motorsQuote:
Originally Posted by driftspin
Oh ok, that is a lot less then i expected..Quote:
Originally Posted by Davek0974
Thanx for that.
Grtz. Bert.
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