Workshop made Acetal / DELRIN Rack & Pinion

[A_Camera]

All good feedback and food for thought thanks.

From what I can work out ball screw at roughly 1500mm would be around £75 plus the nut at around £60 and I have two on my x axis so it's more like £260 ish.

Will you be upgrading only the X? Also, don't forget to buy machined ball screws AND also support bearings and ball nut bracket, unless you plan on making those. Another thing is that I don't think you should buy 1605 in that length, go for at least 2005.

Guess I am mainly considering r&p because Peter that does the cncnutz YouTube blog has had a good experience with it.

If R&P is good enough or not depends on your requirements. Though, I think I'd personally prefer timing belt and not R&P.

[JAZZCNC]

Will you be upgrading only the X? Also, don't forget to buy machined ball screws AND also support bearings and ball nut bracket, unless you plan on making those. Another thing is that I don't think you should buy 1605 in that length, go for at least 2005.

If this is a router then wouldn't use 2005, it will be far too slow. Router needs at least 10mm pitch and at this length I'd be inclined to use 20mm pitch with 2:1 ratio to lower screw speed and increase torque.

Should get 2020 screw with end bearings and machined for about £200.

[A_Camera]

If this is a router then wouldn't use 2005, it will be far too slow. Router needs at least 10mm pitch and at this length I'd be inclined to use 20mm pitch with 2:1 ratio to lower screw speed and increase torque.

Should get 2020 screw with end bearings and machined for about £200.

You are probably right but I mentioned 2005 because 1605 was mentioned before, which I don't think is very good at that length due to the risk of deflation. 2005 is considerably stronger but of course 2010 will be even better speed vise. I didn't know that you can get 2020 but sure that would be even better at this length.

[Paul3112]

If this is a router then wouldn't use 2005, it will be far too slow. Router needs at least 10mm pitch and at this length I'd be inclined to use 20mm pitch with 2:1 ratio to lower screw speed and increase torque.

Should get 2020 screw with end bearings and machined for about £200.

Not arguing here, but from experience .. when using steppers, the faster the screw the greater the chance to miss steps. (tool load)
I will also ad this link as Fred now ships from Germany. https://www.aliexpress.com/store/pro...612.0.0.PXFXn5

[davo453]

Thanks again.

I have costed this out (haven't asked for a quote though) and I am up around $600 ish (+VAT etc) so that kills the whole idea for the time being, cash flow is not so good right now.

The problem seems to be that the screws would need to be 1500mm long and at that length the shipping goes through the roof, so because of that using a local company such as Zapp might be cheaper anyway.

The machine does more that earn it's living so I'll save up the pennies over the next few months.

Cheers

Dave

[A_Camera]

So, back at the original idea. Make some delrin nuts and off you go.

[davo453]

So, back at the original idea. Make some delrin nuts and off you go.

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.

[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.