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Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains

Sat 09 January 2010, 14:13

Replies: 43

Can backlash give a cumulative error?

Views: 51,547

Posted By bradm

Chopper, no one is saying that you haven't...

Chopper, no one is saying that you haven't observed _something_ accumulating.

We are pointing out that calling whatever is happening "backlash" is wrong.

Because we are getting hung up on that...

Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains

Fri 08 January 2010, 19:03

Replies: 43

Can backlash give a cumulative error?

Views: 51,547

Posted By bradm

Chopper, I think the point of disagreement here...

Chopper, I think the point of disagreement here is that after the stressed bit lifts from the material; it should go back to a neutral position similar to its initial state. As soon as it does that,...

Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains

Fri 08 January 2010, 15:39

Replies: 43

Can backlash give a cumulative error?

Views: 51,547

Posted By bradm

Chopper- It's been clear that a lot of us have...

Chopper-
It's been clear that a lot of us have been talking past each other on this. I think I now get what you are trying to say, which is that the momentum from extra backlash carries through...

Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains

Fri 08 January 2010, 12:24

Replies: 43

Can backlash give a cumulative error?

Views: 51,547

Posted By bradm

Chopper, imagine a gear system where the stepper...

Chopper, imagine a gear system where the stepper motor shaft is welded to the casing and cannot move. That gear system would still exhibit backlash (in response to external pressures), but clearly...

Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains

Fri 08 January 2010, 10:09

Replies: 43

Can backlash give a cumulative error?

Views: 51,547

Posted By bradm

Chopper, backlash is not cumulative. if you gain...

Chopper, backlash is not cumulative. if you gain .005 one direction, you lose it back the other direction. It's just the slop. Only lost steps (or shaft slippage) will accumulate.

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