Steper and driver choice

[Aaronem]

Hi All
I have almost competed the frame, gantry and linear bearings of a 1.5m x 1.5m woodwork router, and need to acquire stepper motors and drivers system. The gantry wieghs about 79 kg, and lead screws are 16mm dia with 4mm pitch. I am in the UK and need to find a cheap solution. What spec will I need for motors, or what speed will the tool have to move.

These are on ebay....The holding torque is 14kg.cm. They are 3 amp, 2.55 volts with 1.8 degree stepping angle. The dimensions are 78mm x 56 mm x 56 mm. Hope this helps.

No other info available yet, will they do?

Any help would be really appreciated
TIA
Aaron

[vger]

Aaron,
Those motors are rather small (NEMA 23's most likely) for trying to move that heavy a gantry. You might get away with it doing a high gearing (belting) ratio but it'll take lots of steps to move very far and your speed will suffer greatly. Look for some much larger motors.

Steve

[pminmo]

While the following is in inch units, the technicals on driving lead screws and transfer of mechanical power via a stepper might be usefull reading for you: http://pminmo.com/PMinMOwiki/index.p...chanical_Power

[Zappautomation]

The motors are too small, unless you are happy with a very slow speed.

Originally Posted by Aaronem Hi All I have almost competed the frame, gantry and linear bearings of a 1.5m x 1.5m woodwork router, and need to acquire stepper motors and drivers system. The gantry wieghs about 79 kg, and lead screws are 16mm dia with 4mm pitch. I am in the UK and need to find a cheap solution. What spec will I need for motors, or what speed will the tool have to move. These are on ebay....The holding torque is 14kg.cm. They are 3 amp, 2.55 volts with 1.8 degree stepping angle. The dimensions are 78mm x 56 mm x 56 mm. Hope this helps. No other info available yet, will they do? Any help would be really appreciated TIA Aaron

[Oldmanandhistoy]

Take a look at http://www.motioncontrolproducts.co.uk/ for motors and drives. I use there MSD*** drivers and find they have been very reliable and fairly priced.

John

[Kipper]

I bought these some time ago and @79KG your gantry seems "large" enough to need some grunt! 12nm motors are awesome (imo) I have no reservations with these drivers/motors I just turn it on and away it goes... ebay MCP Not sure I need all that grunt on all axes though...But it can't hurt lol