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It's all to do with parallel and Angular misalignments and to a lesser degree axial growth or misalignment.

Read this it will explain the different types and Torque ratings etc....

I've snapped 3 of those metal 'flexible' couplings so far.
I now use the spider type with no problem at all....

Couple of odd comments:

IP/M is very happy with direct connection of prox switches running on 24V. Works well.

IP/M drives the usual stepper drivers directly without needing any resistors. Use...

Don't waste money buying the expensive switches Just buy the cheap Chinese switches off ebay.

I've fitted 100's and probably had about 3 in total that was faulty out of the bag. I've had about 5...

it depends on the budget your working to

if its a hobby machine then try amazon or ebay etc
buy 1 to check the quality then order the others you need

for a business machine you use to make...

You can use one sensor on the moving part and two targets, one at each end. In normal operation, this acts as the limit switch but during homing, Mach3 and the IP-M know that it is being used for...

You have mentioned that you will be using the CSMIO IP-M controller. This controller is using the industry standard 24V inputs and you can use either PNP or NPN sensors, the 10-30V type.



If...

Have a look at this thread

http://www.mycncuk.com/threads/10262-Wiring-24v-NPN-Proximity-Switch-to-5v-BOB-Why-does-nt-it-work


You can regard the LJ12A3-4-Z/BX as a normally open relay,...

In terms of proximity sensors :
I would go for the 4mm distance sensing type

Prox sensors are more sensitive on steel targets compared to aluminium

They run on something like 12V -30V,...

If you are cutting steel do not use one requiring a magnet.

The detector detects a passing object so it cannot be crushed if it fails.

Reasons toroids are potted in a plastic case include reducing audible hum (potting compound locks the windings solid) and because they may look smarter! - important for HiFi. To do it properly you...

OK , that makes sense renewing the old insulation
I would still replace the tape

Is this Mounting Disc the type of thing your looking out ?...

Picking up on question E) in post one - you could use a Hall effect sensor but they need a magnet 🧲 on the moving part and are likely to attract steel chips and filings and become unreliable. ...

Paulus.v Explanation of Homing on an index is spot on, however, I think you'll find that most Closed-loop Hybrid servo encoders don't provide an index Pulse so can't use that feature.

Regards...

Hi JW,

Let me try to clarify what the homing on index function on a servo motor is.

The incremental encoder on a servo motor generates pulses when the motor moves. The motor driver is capable...

Ok when I said you had it wrong I was referring to "My drivers (JMC 2HSS86H) can be run with 24-70V DC or 30-100V AC" you have the DC and AC transposed .

You indicated that you would be leaning...

I would go with the single belt rather than the solid stops It is a tried and tested route with many people using it. If you can afford it go with the mains 230V drive and the nema 34 for the twin...

My router has an inside area of 970 by 500 and I use an 8Nm Nema 34 driving twin 1610 ballscrews via a belt (I'm using a 230V driver not an AM882 to get the speed) in my X, Nema 23s on Y and Z with Y...

Provided every thing in the chain matches then no there nothing wrong with having a motor that's more powerful than your needs. . . . However.?

Larger motors commonly have much Higher inductance...

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...

If you are using steppers and don't need slaved axis or Backlash compensation then the IP-M is better option. Here's why.

The Cslabs controllers use 24V I/O which is very noise immune but more...

A Tutorial on motor torque calculations

A question oft asked on MYCNCUK is "how big a motor do I need?". There is no simple answer to this, and the options are usually:
a) follow someone elses...