Hi;
I have a 1995 micromill with a smartstep/3 controler. The machine is from a school in the USA. I reviewed the dos software manual and had a question about spindle speed control. The spindle motor control is a KBIC-240DS (not a sprint400 controller shown in some drawings.)
My question - Is the spindle speed controlled by the software or by the speed control knob on the front of the machine.
The dos manual I have shows some milling code examples. In these examples you create code specifying the spindle speed.
The KBIC-240DS can be controlled by an input voltage but I cannot find any information on the wiring that shows the control voltage going to the controller. I have not had the chance to connect the Micromill to a computer to test the code examples.
Regards
1995 Micromill spindle control
Moderators: Martin, Steve, Mr Magoo
Re: 1995 Micromill spindle control
Hi,
I am not sure on this one. The KB drive has inputs P1 P2 and P3 these are for an external potentiometer. I would follow the wires and check where they go. If there is an analog control there will only be wires on the P1 and P2 terminals. If there are 3 wires there will be a pot that controls the speed.
The Denstep control card had an analog output built in on it but the smart step did not.
I am not sure on this one. The KB drive has inputs P1 P2 and P3 these are for an external potentiometer. I would follow the wires and check where they go. If there is an analog control there will only be wires on the P1 and P2 terminals. If there are 3 wires there will be a pot that controls the speed.
The Denstep control card had an analog output built in on it but the smart step did not.
Re: 1995 Micromill spindle control
Steve;
Thank you for your reply,
The controller has 3 wires for a pot. I could not find any information on voltage outputs on the smartstep/3 card and it is very difficult to trace the wiring since it is in wiring trays. The wiring diagram in the Micromill Dos manual was a little hard to trace but I did not see any analog outputs going to the controller. The Micromill Dos manual had the information about speed control in the code so I had hoped that it would. Once I get the computer set up I will find out.
Regards
Thank you for your reply,
The controller has 3 wires for a pot. I could not find any information on voltage outputs on the smartstep/3 card and it is very difficult to trace the wiring since it is in wiring trays. The wiring diagram in the Micromill Dos manual was a little hard to trace but I did not see any analog outputs going to the controller. The Micromill Dos manual had the information about speed control in the code so I had hoped that it would. Once I get the computer set up I will find out.
Regards
Re: 1995 Micromill spindle control
Hi,
The Terminals P1 and P3 have 10V DC on them. The pot wires to this, I think it is 5K ohm. P2 is the analog in.
Be carfull around the spindle drive as it is uniscolated and all the terminals are floating at mains potential.
The Terminals P1 and P3 have 10V DC on them. The pot wires to this, I think it is 5K ohm. P2 is the analog in.
Be carfull around the spindle drive as it is uniscolated and all the terminals are floating at mains potential.