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1

General Mach Discussion / What Ratio Do I use

« on: March 15, 2013, 10:19:19 AM »

Hi,

just wondering if I employ a couple of stepper motors for my X,Y,Z axis how do I go about sizing them , any tips welcome.

What is the normal reduction ratio you guys use on the tooth belt stage, I am guessing about 5:1. Ultimately this should give me my resolution right ?


regards   Les C

2

General Mach Discussion / Can Mach 3 do this ????

« on: March 14, 2013, 08:19:23 AM »

The problem with stepper drives, is that you may well put out the pulse to the motor from a controller card, it may have even turned, but due to toothed belts, worn lead screws, inertia, and anythink else you can think ,of the table may well not have achieved the requested position.

Therefore a better system is to take feed back via linear encoders that tell ' Mach3' where the table is and then Mach 3 can then decide how many extra pulses it should supply to get to the required position i.e. closed loop control. 

Can Mach3 do this

Can Mach 3  drive servo motors rather than steppers ??

I am the new guy on the block so appologies if this has been discussed already and I missed it.

Les C