Z-Axis Break

[Blaze]

Hello All,
I hope this message finds you well. I have a quick question and would appreciate your input.
I am working with a Leadshine Easy Servo Model: 86HSM85-BZ-E1, which has the following wiring:
Black = A+
Red = A-
Yellow = B+
Blue = B-
Additionally, there are two more wires:
White = +24V
Green = 0V, which I believe is for the brake connection per the attached document.

I have searched the Leadshine website for information on this motor and the 758 Driver but have not found any relevant details. If I am correct, should I connect the 2 additional wires for the brake as suggested in the pictures below?
Do I have to select the spindle brake on the Acorn wizard on Acorn

Also, is this Z-axis motor with brake function considered the spindle brake or just the Z-axis brake shown on G6 of this schematic ?

S15259.r4.pdf

(513.99 KiB) Downloaded 3 times

Thank you for your assistance!

[Chaz]

Yep, there is a brake option on the Wizard for the axis that its being used on.

[richardb15]

Also, is this Z-axis motor with brake function considered the spindle brake or just the Z-axis brake shown on G6 of this schematic ?

The Z axis drive is just the Z axis drive, nothing to do with the spindle.

There is no need to use any brake wiring/connection on these motors and drives, just set the parameters to have a % holding torque and that will act like a brake for the axis. It is usually described by Leadshine as "Power-on lock shaft current percentage" and I usually use a value between 15 and 40% depending on what is being held/braked. Very high values can cause motor overheating, low values will cause backdriving and then give position errors.

So I wouldn't use any external brake or one set up in the Wizard. Just use the Leadshine drive parameters to set that lock torque.

[ShawnM]

Also, is this Z-axis motor with brake function considered the spindle brake or just the Z-axis brake shown on G6 of this schematic ?

The Z axis drive is just the Z axis drive, nothing to do with the spindle.

There is no need to use any brake wiring/connection on these motors and drives, just set the parameters to have a % holding torque and that will act like a brake for the axis. It is usually described by Leadshine as "Power-on lock shaft current percentage" and I usually use a value between 15 and 40% depending on what is being held/braked. Very high values can cause motor overheating, low values will cause backdriving and then give position errors.

So I wouldn't use any external brake or one set up in the Wizard. Just use the Leadshine drive parameters to set that lock torque.

Richard, the Z axis brake is to hold the motors position when the system is turned off or the drive is not enabled. It keeps the Z axis from dropping to the table when you power down the system.

The one diagram shows a brake connection but does not call out wire color. Blaze listed white as 24v and green as 0v but I don’t know where he got this info as it’s not posted.

[richardb15]

Richard, the Z axis brake is to hold the motors position when the system is turned off. It keeps the Z axis from dropping to the table when you power down the system.

Ah okay fair enough, I've never used these motor/drives on anything that has a mechanical arrangement that would lose position via gravity on power off

[ShawnM]

Richard, the Z axis brake is to hold the motors position when the system is turned off. It keeps the Z axis from dropping to the table when you power down the system.

Ah okay fair enough, I've never used these motor/drives on anything that has a mechanical arrangement that would lose position via gravity on power off

It all depends on the Z axis design, gearing and the dead weight of the Z axis assembly on a router or plasma table. I’m guessing this is not an issue on a mill.

[ShawnM]

Hello All,
I hope this message finds you well. I have a quick question and would appreciate your input.
I am working with a Leadshine Easy Servo Model: 86HSM85-BZ-E1, which has the following wiring:
Black = A+
Red = A-
Yellow = B+
Blue = B-
Additionally, there are two more wires:
White = +24V
Green = 0V, which I believe is for the brake connection per the attached document.11.jpg2 Z-Axis with Brake motor connection designation.jpg

Blaze, where do you see the wire colors and designation for the motor brake? I see in one diagram a connection for a brake but no where do I see wire colors called out.

[Blaze]

Also, is this Z-axis motor with brake function considered the spindle brake or just the Z-axis brake shown on G6 of this schematic ?

The Z axis drive is just the Z axis drive, nothing to do with the spindle.

There is no need to use any brake wiring/connection on these motors and drives, just set the parameters to have a % holding torque and that will act like a brake for the axis. It is usually described by Leadshine as "Power-on lock shaft current percentage" and I usually use a value between 15 and 40% depending on what is being held/braked. Very high values can cause motor overheating, low values will cause backdriving and then give position errors.

So I wouldn't use any external brake or one set up in the Wizard. Just use the Leadshine drive parameters to set that lock torque.

Richard, the Z axis brake is to hold the motors position when the system is turned off or the drive is not enabled. It keeps the Z axis from dropping to the table when you power down the system.

The one diagram shows a brake connection but does not call out wire color. Blaze listed white as 24v and green as 0v but I don’t know where he got this info as it’s not posted.

It's wonderful to hear from you again! I've been traveling for work, which left me with little time for myself. However, I am now back home for good and would like to continue the conversion.

You are correct that there are no color designations for the brake. I believe the white wire was marked as +24V and the green as “0”before I disconnected the machine for the upgrade to Acorn Six. If necessary, I can look for additional documentation to help identify these wires.

It appears that the Z-axis is holding its position well for now. I haven't encountered any problems, such as the axis dropping or failing to maintain its position when the machine is cycled on or off.

[Blaze]

Also, is this Z-axis motor with brake function considered the spindle brake or just the Z-axis brake shown on G6 of this schematic ?

The Z axis drive is just the Z axis drive, nothing to do with the spindle.

There is no need to use any brake wiring/connection on these motors and drives, just set the parameters to have a % holding torque and that will act like a brake for the axis. It is usually described by Leadshine as "Power-on lock shaft current percentage" and I usually use a value between 15 and 40% depending on what is being held/braked. Very high values can cause motor overheating, low values will cause backdriving and then give position errors.

So I wouldn't use any external brake or one set up in the Wizard. Just use the Leadshine drive parameters to set that lock torque.

Richard, the Z axis brake is to hold the motors position when the system is turned off or the drive is not enabled. It keeps the Z axis from dropping to the table when you power down the system.

The one diagram shows a brake connection but does not call out wire color. Blaze listed white as 24v and green as 0v but I don’t know where he got this info as it’s not posted.

Thanks all for your quick reply
Mr.Shawn It's wonderful to hear from you again! I've been traveling for work, which left me with little time for myself. However, I am now back home for good and would like to continue the conversion.

You are correct that there are no color designations for the brake. I believe the white wire was marked as +24V and the green as “0”before I disconnected the machine for the upgrade to Acorn Six. If necessary, I can look for additional documentation to help identify these wires.

It appears that the Z-axis is holding its position well for now. I haven't encountered any problems, such as the axis dropping or failing to maintain its position when the machine is cycled on or off.

[cnckeith]

fyi.. a lot of electro magnetic brakes don't care about polarity of the dc voltage applied so they often have the same color wire for both wires.