1220 × 2440 build

**malcolm01** · 03-03-2018

the gantry looks a bit too low to me, id say try to get this a rock solid as possible, I thought machine was solid but turns out the ready made z axis assembly is not solid enough, getting vibration when cutting 18mm mdf in one pass, It the only bit that hasn't got hiwin rails, will changing it soon and ill be changing my spindle for an ATC spindle

**HullMark** · 03-03-2018

Originally Posted by malcolm01

the gantry looks a bit too low to me, id say try to get this a rock solid as possible, I thought machine was solid but turns out the ready made z axis assembly is not solid enough, getting vibration when cutting 18mm mdf in one pass, It the only bit that hasn't got hiwin rails, will changing it soon and ill be changing my spindle for an ATC spindle

Ah sorry to hear that, but thanks for letting me know. I was considering just buying theirs. I tried to keep the gantry as low to the rail as possible. Droping the bed lower instead of raising the gantry seems like it'd be stronger.

I need to go see my engineer now I have a little more idea about what I want. Doesn't seem too difficult to make the z axis from scratch.

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**malcolm01** · 03-03-2018

the guy jazzcnc sent a link to an American site that looked good, they have a preassembled part that I really like the look of

https://www.aliexpress.com/item/CNC-...6ab831b0ZkP59s

**JAZZCNC** · 03-03-2018

Originally Posted by malcolm01

the guy jazzcnc sent a link to an American site that looked good, they have a preassembled part that I really like the look of

https://www.aliexpress.com/item/CNC-...6ab831b0ZkP59s

Wouldn't buy that either.? Those ball screw bearing blocks are not designed for this purpose and will almost certainly have some end float.
Also the price is ridiculous. You can buy all the bits and build your own better for lot less.

**Desertboy** · 05-03-2018

Originally Posted by malcolm01

the guy jazzcnc sent a link to an American site that looked good, they have a preassembled part that I really like the look of

https://www.aliexpress.com/item/CNC-...6ab831b0ZkP59s

Looks a lot like my Z axis but I have BK12/BF12 fittings

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Cost me ~£100 to build but I recovered the Hiwin's.

**HullMark** · 05-03-2018

Originally Posted by Desertboy

Looks a lot like my Z axis but I have BK12/BF12 fittings

Cost me ~£100 to build but I recovered the Hiwin's.

Yeah that's nice and simple looking, is it meaty enough Desertboy for your uses?

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**malcolm01** · 03-03-2018

if you look at my c beam picture, I joined 3 bits of aluminium together, this is ridiculously rigid but very heavy! if I could do this again id use light weight aluminium profile instead! I have no doubt it would be still as rigid, keeping the weight down would be a good idea because the gantry is cumbersome and requires a lot of power to heave it about, the x axis struggles while the y axis flies
I'm not so sure keeping it so low wouldn't ending up causing you problems down the line. also when I'm making a new base for my machine I plan to make the underside suitable for sheet storage, my workshop is small and the machine swamps the place so sheets lying around are a real pain

**HullMark** · 03-03-2018

Originally Posted by malcolm01

if you look at my c beam picture, I joined 3 bits of aluminium together, this is ridiculously rigid but very heavy! if I could do this again id use light weight aluminium profile instead! I have no doubt it would be still as rigid, I'm not so sure keeping it so low wouldn't ending up causing you problems down the line. also when I'm making a new base for my machine I plan to make the underside suitable for sheet storage, my workshop is small and the machine swamps the place so sheets lying around are a real pain

Yeah I spent a little while trying to find one like it until I looked at the picture more closely! Nice idea about storage ... is the base of yours made from wood?

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**HullMark** · 03-03-2018

Originally Posted by HullMark

Yeah I spent a little while trying to find one like it until I looked at the picture more closely! Nice idea about storage ... is the base of yours made from wood?

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I think I'll maybe go with your c beam then, it's an option for sure

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**malcolm01** · 03-03-2018

yes I built a torsion box from mdf, stupid idea, my idea was to pivot the machine against the wall when not in use, terrible idea so I plan a new table, mix of steel and aluminium, I was thinking if you used Turbocad id have sent yiu my drawings of my machine, theyre a bit ruff but you might have seen something usefull