[joeavaerage]

Hi,
you say that the power supply does not have a connection for a potentiometer? That would suggest that the power supply is a fixed output voltage, in which case the
spindle will go at one speed only. In order for the spindle speed to vary the voltage of the power supply must vary, and such supplies are available but they are somewhat
specialised....and the cost reflects that.

When the supply turns up post some pics, and preferably some documentation about the supply.

Craig

[Yellowhair]

Hi Craig, on a previous post there is a picture where it shows where the connector goes that connects to the spindle speed potentiometer.
On the new power supply which is stated to be a switchable power supply has a plastic type of pot where it states the spindle speed can be increased or decreased manually.

Best regards, Joe

[joeavaerage]

HI,
OK, then that sound like an adjustable output supply, which is good because thats what you require.

Some supplies such as matec posted can vary the output voltage in response to a 0V-10V DC signal, and has the same effect as the pot. They are great for using a CNC
program like Mach to control the speed of the spindle. Lets hope your new supply either has that or can be modified to do the same.

Craig

[Yellowhair]

Cheer, thanks for your help.

Best regards

[mactec54]

HI,
OK, then that sound like an adjustable output supply, which is good because thats what you require.

Some supplies such as matec posted can vary the output voltage in response to a 0V-10V DC signal, and has the same effect as the pot. They are great for using a CNC
program like Mach to control the speed of the spindle. Lets hope your new supply either has that or can be modified to do the same.

Craig

Understand what he it is Powering; he has a DC spindle motor, so the 48v supply is a DC motor controller (Not a regular Power Supply) which has the PWM built into the DC Motor Controller.

[hanermo]

Generally, these were ok for old stuff.
Today, spindles can do hard tapping via encoder input.
CSLabs csmio-ips supports this.

HI,
OK, then that sound like an adjustable output supply, which is good because thats what you require.

Some supplies such as matec posted can vary the output voltage in response to a 0V-10V DC signal, and has the same effect as the pot. They are great for using a CNC
program like Mach to control the speed of the spindle. Lets hope your new supply either has that or can be modified to do the same.

Craig

[Yellowhair]

Thank you everyone who helped me get my head around what had happened and how to get over it.
About to re-assemble now having tested the power supply and controllers .:wee:

Many thanks & Best regards

Joe