New start

[Desertboy]

And just to clarify (I have no clue)
If running 1600 microsteps and 10mm pitch screw with the standard 200steps/rev motors.. how fast will 50khz get me? :D

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LOL I'm going to run 16 microsteps ;) so 100 times less

Jazz is the man to ask but I think

50000*60 == 3000000 pulses per minute /1600 = 1875 revolutions per minute I think, times that by pitch for distance.

[Nr1madman]

LOL I'm going to run 16 microsteps ;) so 100 times less

Jazz is the man to ask but I think

50000*60 == 3000000 pulses per minute /1600 = 1875 revolutions per minute I think, times that by pitch for distance.

Hmm... I might be over thinking this!

Maybe I was thinking about 1600 pulses so 8 microsteps per step.. have to rethink :D

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[Desertboy]

Hmm... I might be over thinking this!

Maybe I was thinking about 1600 pulses so 8 microsteps per step.. have to rethink :D

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That's ok because I should have divided the last one by 200 ha ha ha forgot the steps.

[Nr1madman]

Alright.. now Im really really tired of wires :D

Got the pc working and installed uccnc sucessfully!! Makes me want to scream in joy!

As Ive said before Im following a schematic I found on the forum.
But in this schematic the limitswitches power a relay and this enables a signal to the bob.

Shouldnt the limitswitches be connected with the estop circuit and stop the main relay from latching?
That way the power would be cut if a limit is breached?

Otherwise the axis that hits a limit might continue if there is software malfunction?

[Clive S]

Do you have soft limits as well? It's all debatable but hitting the limits say while jogging should not (in my opinion) be an E-Stop as it is not an emergency

[Nickhofen]

Robert in the name of Odin, can you share the schematic, or point the thread? :-)

[Nr1madman]

Robert in the name of Odin, can you share the schematic, or point the thread? :-)

Haha I stole this one

Mostly what I'm aiming for but slight modification.
Have routed the enable signal straight through the main relay instead of using two relays.
Have not understood the logic of using two relays yet..

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[Davek0974]

Do you have soft limits as well? It's all debatable but hitting the limits say while jogging should not (in my opinion) be an E-Stop as it is not an emergency

This is why I would always recommend running soft-limits. IMHO the type of machine decides the limit system used - A stepper drive is safe if it runs away and hits a stop, the steppers will stall so I would forget limits altogether and fit a home switch plus soft limits, nothing more.

On a servo drive, mechanical breakage is very easy so i would fit hard limit switches wired to the servo power/estop circuit contactor, forget the software, just kill the power. Then fit a home switch and use soft limits to ensure you cannot jog into a limit, ever.

[Nr1madman]

This is why I would always recommend running soft-limits. IMHO the type of machine decides the limit system used - A stepper drive is safe if it runs away and hits a stop, the steppers will stall so I would forget limits altogether and fit a home switch plus soft limits, nothing more.

On a servo drive, mechanical breakage is very easy so i would fit hard limit switches wired to the servo power/estop circuit contactor, forget the software, just kill the power. Then fit a home switch and use soft limits to ensure you cannot jog into a limit, ever.

Aha! Good reasoning :)
Then I feel safe with my steppers!
Limits to the bob only and no messing with e stop!

Thanks :D

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