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hyw

《DIY tools for personal use》Sand disc

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Self-made sand  disk . Three-phase motor frequency control, can achieve accurate grinding, chamfering, low speed does not affect the torque output, ultra-low noise night operation. The table surface of the two-axis slide rail can be moved and polished, and can also be locked at any angle. The sandpaper can be quickly changed by hand by turning two nuts on the dust-collecting cover. High precision machining ensures minimal deviation and in some cases can be used as an alternative tool for milling small parts.

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This really looks great! I know nothing about motors but does “frequency control” mean variable control? What was the total cost of the parts?...Moab

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Hi hyw,

 

That's a nice piece of machinery. Based on the size of the square (250x160) I estimate the sanding disk to be 125 mm in diameter.

The table is 200x100 mm (?) and sits on a linear guiding rail, but how do you tilt it?

And a last question: this seems to be a 3-phase AC induction motor with frequency converter, but what is its power rating.

It looks quite heavy for working with wood pieces of the size most used by modellers.

Anyway... this is well done.

 

regards,

   Kris

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15 hours ago, Moab said:

This really looks great! I know nothing about motors but does “frequency control” mean variable control? What was the total cost of the parts?...Moab

Hi Moab.  By changing the frequency speed, the basic loss of torque output, than the usual current speed is much more stable. The cost per unit must be much higher than the cost of mass production. . .

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11 hours ago, Kris Avonts said:

Hi hyw,

 

That's a nice piece of machinery. Based on the size of the square (250x160) I estimate the sanding disk to be 125 mm in diameter.

The table is 200x100 mm (?) and sits on a linear guiding rail, but how do you tilt it?

And a last question: this seems to be a 3-phase AC induction motor with frequency converter, but what is its power rating.

It looks quite heavy for working with wood pieces of the size most used by modellers.

Anyway... this is well done.

 

regards,

 Kris

Hi  Kris, The diameter of this sand table is 150. As a high precision grinding tool, the more the joints, the greater the deviation; in the effective range of grinding, whether horizontal or vertical, the role and stroke is the same. So I through the table on the backrest design angle adjustment to achieve the "tilt" function. It's much more stable on the countertop. Because of the need to polish the metal parts, the motor has a power of 750w; the weight is about more than 30 kg.

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That's engineering !

 

Could you you show the machine in a tilted configuration ?

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