Thread: Comparing motion controllers...
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11-02-2016 #1
1 – Can’t stop thinking if it would be possible to install a second switch anyway? Or is that what you just said?
Connected so that the signal that keeps the gantry moving continues until both switches have broken the circuit.
It’s not the proper way to think but I’m new to this and I guess if it would be that simple, it would have been done right?
2 – To install 2 reference “pieces” from where the gantry position on each side can be measured.
So once in a while after homing the gantry I can twist one of the screws manually to set the gantry square and then turn it on again.
Would that work?
3 – I could let both ballscrews be driven from the same motor but I guess that would require a belt and with that I would loose some of the precision.
4 – What is the downside of squaring it the crude way besides that it feels… Crude?
5 – Would it help a bit if I choose 400 step motors instead of 200?
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3 – I could let both ballscrews be driven from the same motor but I guess that would require a belt and with that I would loose some of the precision.
Installing a second switch as your point (1) will not work. Point (2) Will work as Jazzcnc has already said (but it is not an elegant way of doing it). Not sure what you mean in point (5) it has nothing to do with the homing sequence..Clive
The more you know, The better you know, How little you know
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11-02-2016 #3
To answer your last point,
When you set up your stepper drives system, you should set the drivers to microstep. That will make them run smoother and also allow you to have better resolution of angle. 10-16 microsteps is good depending on what resolutions you really want.https://emvioeng.com
Machine tools and 3D printing supplies. Expanding constantly.
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11-02-2016 #4
When i looked at stepper motors i found motors with different step angles.
0.9° - 400 steps/revolution
1,8° - 200 steps/revolution
Im thinking that if i choose the one with the higher resolution Everything will be better...?
Allthough ive got a feeling its not that simple...
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11-02-2016 #5
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11-02-2016 #7
Hear you... Ive just read about microstepping and torque and so on. It seems like the real benefit of microstepping is not so much improved accuracy as less noise and less wear as mentioned above... So, i will settle for the more common 1.8°motors and i will set the drivers to microstep.
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11-02-2016 #9
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11-02-2016 #10
I use a belt and a single stepper and an IP-M and I'd say that I'm not losing any precision! I cut plastic bearings for work and easily hold tolerances down to 0.1mm (although plastic does creep after machining) and I'm sure if I cut some aluminium or suchlike I could hold better tolerances...in short what I'm saying is that a belt will not lose you precision but will mean that you can't rack your gantry and only need one homing switch not two....lots of pros and can't see too many cons (apart from having a long belt running at the back of my router.)
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