3 Axis TB6560 Stepper Motor Driver Board
This board can be used with the Zen Toolworks CNC 2008 DIY Kits 7x7 and 12x12. The card is controlled by the CNC software used by the customer, however it has been recommend that Mach3 for Windows users and EMC2 for Linux users are the most compatible and usable software packages available.
The following chart can be used as a reference when you setup the motor tuning in Mach3. It is better if you understand how the value got calculated so that you can debug the issue when it is not moving as expected. Basically, with a full step setting, 200 steps will make the stepper motor(1.8 degree/step) move one revolution. If the lead of the leadscrew is 1.25 mm, then 200/1.25 = 160 steps will make 1 mm(unit) movement. With microstep setting, you will just need to multiply the number to previous calculated results. Like if you are using 8 microstep, than 160x8 = 1280 steps / mm(unit). In case you are using inches unit system, you will also need to multiply 25.4 to the result. For example, 1.25mm leadscrew with 8 microstep, it will be 1280 x 25.4 = 32512 steps/inch.
|Microstepping Setting||1.25 mm Lead||8 mm Lead||20 mm Lead|
|Max Resolution||0.0004mm||0.0025 mm||0.00625 mm|
The 3x 6560 card features:
- 2 Phase bipolar with pulse modulating technology
- Micro step setting with full, ½, 1/8, 1/16 resolution
- Can be used with 4, 6 or 8 lead motors
- Adjustable current output at 100%, 75%, 50% and 25%
- On-board input signal connector for easy limit/home switch setup
- On-board DIP control for micro-step resolution and torque
The board requires two power sources in order to operate properly. One is the power to drive motors, and another is for the digital signal processing. The motor power requires 12V DC, and the processing power requires 7-12VDC.The reason of using two separate power supply is to eliminate the interference and give more stable performance. UPDATE: You can use 12VDC switching power unit or adapter from ZTW for both power sources, instead of using two seperate power supply units. So far we haven't heard any issue by doing that.
Read the User Instructions (link below) for technical details.
Below is the most updated install instruction, step by step:
Limit/Home Wiring and Software Setup
There are many different ways to setup and configure your limit/home switches on your machine. Everyone has their own opinion on the best way to do this. What this tutorial will be showing is just one option that seems to work well for us. The picture above is the best way to really show how to wire and connect this setup. The switches of coarse would actually be mounted to your machine in their respective locations. Your Geekers TB6560 Board has a set of 8 terminals to the left of the parallel port. This is the location of the limit and homing terminals. The way we will configure Mach3 gives the following layout.:
P1 : Limit / E-Stop Switches
P2 : X-Home
P3 : Y-Home
P4 : Z-Home
All of the switches are to be wired in the "Normally Open" configuration. This can be dermined with a multimeter if it does not specify on your switch. Normally open means no current flows through the switch normally. When switch is tripped, current begins to flow. Once you have all your switches wired in the Orientation as shown here, we can move along to the software setup steps.
Use the "Config" dropdown menu and select "Ports and Pins". From there, select the "Inputs" Tab. Now be sure and copy what you see above over to your screen. Scroll down a bit and move to Step 3.
Scrolling down a little reveals more inputs. Be sure the "E-Stop" signal is configured as shown here. Once complete, hit apply and "OK".
Now go to the "Diagnostics" tab. It will take you to this screen. If the big "Reset" button is flashing, go ahead and click it. You should have NO yellow boxes on the right yet. Press your X-Home switch. The yellow box for M1Home should light up.
Press your Y-Home switch. The yellow box for M2Home should light up.
Press your Z-Home switch. The yellow box for M3Home should light up.
Lastly you can do this same test for any of your limit switches or E-Stop switch. If any are depressed, your screen will look like the above, and the "Reset" Button will be flashing again. You will need to press it before any movements on the machine can be made. If all went well, you now successfully have set up your home and limit switches. Here is a link to youtube demonstrating the process: youtube.