Workshop made Acetal / DELRIN Rack & Pinion

[A_Camera]

As I said I have had those (for almost 3 years) and they are great but don't solve the slight problem of lash (resonant frequency) of the screw but it's not at all that bad really just a desire for my version of perfection I suppose.

But if you make the nuts it can indeed solve the backlash issue. Not an optimal solution but definitely a solution. At least until you can afford balls crews.

[njhussey]

But if you make the nuts it can indeed solve the backlash issue. Not an optimal solution but definitely a solution. At least until you can afford balls crews.

It's not a backlash problem I don't think from reading the thread, its whipping of the leadscrews because he's driving them past their max speed to get the speed he wants to machine his materials i.e. beyond the capabilities/limits of his machine. Belts, R&P or ballscrews are the only solution really to machine at the speeds he wants.

Alternatively slow the feed and also RPM of the spindle until there's no whipping......

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[Boyan Silyavski]

600$???

The link i pointed you to is much cheaper.


Also maybe your design is not good. Meaning you drive the screw directly or belted? As when belted the screwis acual length, not the length of your machine. And as that could mean 20-30% longer than actual length necessary.../when screw is end driven directly/


Dont overthink it. Buy 2 screws you need as cheap as possible as you find them. Then you will upgrade rest at a later time. Accept that there is no other way and concentrate how to achieve the best result. All else is no better than what you have now.