Setting up your J750 for GrabCAD Print

  1. Sign up, download, and install
  2. Setting up your J750 for GrabCAD Print
  3. Connect your FDM printers
  4. Take a quick tour
  5. Start printing!
  6. Printing & monitoring remotely with GrabCAD Print Server

This article explains the extra steps required to connect GrabCAD Print with your Stratasys J750 printer. If you don't have a J750, skip ahead to  Connecting your FDM printers


Choose your setup

First, let's define the elements: 

  • GrabCAD Print — The software you will use to prepare print jobs for your J750. This replaces PolyJet Studio, which was sometimes referred to as the "client." 
  • Printer PC — The computer inside of the printer. Sometimes this is referred to as the "Embedded PC."
  • Stratasys J750 Software — The software which displays the current state of the J750 and runs on the Printer PC. Sometimes this is referred to as the "Embedded Software" or just the "Embedded."
  • GrabCAD PolyJet Job Manager — Handles the connection between GrabCAD Print and the Stratasys J750 Software. It receives the job from GrabCAD Print, slices it, and sends a few slices at a time to the Stratasys J750 Software. There is no user interface for this program. For Objet Studio, the program that performed this task was called "PolyJet Studio Server." 
  • Host PC — Depending on how your J750 was installed initially, PolyJet Studio Server may be installed on a separate computer outside of the printer. This was sometimes referred to as the "Server PC."

The recommended way to set up your J750 for printing with GrabCAD is to connect the Printer PC to the office LAN and install GrabCAD PolyJet Job Manager there. If you have a Host PC, it will not be used any more. Having GrabCAD PolyJet Job Manager and the J750 software both installed on the Printer PC increases speed and reliability. If you are unable to connect your J750 to your office LAN, proceed with the alternative scenarios illustrated below which utilize the Host PC. 

GrabCAD Print
GrabCAD PolyJet
Job Manager
Stratasys J750 Software
Scenario 1
Any computer
—Connected to LAN
Printer PC
—Connected to LAN
Printer PC
—Connected to LAN
Scenario 2
Any computer
—Connected to LAN
Host PC
—Connected to LAN
—Connected to J750

Printer PC
—Connected to Host

Scenario 3
Host PC
—Connected to J750
Host PC
—Connected to J750
Printer PC
—Connected to Host

Stop PolyJet Studio Server

GrabCAD PolyJet Job Manager and PolyJet Studio Server cannot be running at the same time. On the computer that's running PolyJet Studio Server, open the Task Manager and stop the service called JobManager.WatchDog.

This may be running on the Printer PC or the Host PC, depending on how your printer was originally installed. 


Get the IP addresses of the computers in the setup

Scenario 1: Go to the Printer PC and follow these steps to give it a network IP address.

Now you need to find out the IP address you just made. To do that, hit the Start button, type cmd to find the Command Prompt program and run it, then type ipconfig /all and hit enter. The IP address will be labelled "IPv4 address..."

Scenarios 2: Hit the Start button, type cmd to find the Command Prompt program and run it, then type ipconfig /all and hit enter. It's most likely that the Host PC has two network cards, so it should have two IP addresses listed. One is, which you will use in Step 4, and the other is what you will use for Step 5. 


Install GrabCAD PolyJet Job Manager

Now you're ready to install GrabCAD PolyJet Job Manager. Click here to download the installer

Scenario 1: Run the installer on the Printer PC and enter for the Printer IP.

Scenario 2: Run the installer on the Host PC and enter for the Printer IP. If this computer does not have internet access, you will need to download the installer elsewhere and transfer to the Host PC via the network or a USB drive. 

Scenario 3: Run the installer on the Host PC and enter for the Printer IP.


Add the J750 in GrabCAD Print and start printing!

In GrabCAD Print, open the printer panel and click "Add."

All Scenarios: Click "Add a network printer" and select the J750. If you do not see the J750 listed, use the IP addresses as follows:

Scenario 1: Enter the IP address of the Printer PC you got in step 3.

Scenario 2: Enter the IP address of the Host PC you got in step 3. 

Scenario 3: Enter for the IP address. 

Updating the Job Manager

When GrabCAD Print updates, GrabCAD PolyJet Job Manager must also be updated. See also:  GrabCAD Print Release Notes.

When the Job Manager is out of date you will not be able to connect to the printer, and GrabCAD Print will automatically switch to the J750 template instead. 

When you go to the printer panel, you will see this message: 

To update the Job Manager open the Printer Panel and click on the J750, then click the Settings button. 

You may need to restart GrabCAD Print at the end of the update.

Switching back to PolyJet Studio

You do not need to uninstall anything to start using PolyJet studio again. All you need to do is stop GrabCAD PolyJet Job Manager and restart PolyJet Studio Server. 

In Task Manager, end the process called  GCP.JobManager.Service.WatchDog and resume the process called JobManager.WatchDog. Note that these processes might be running on different computers, depending on your scenario.

Limitations and known issues

  • If your J750 print job stopped without an error message and you cannot resume, it is likely that the Job Manager has encountered a problem. Uninstalling and reinstalling the Job Manager should resolve this issue. Please send your .PRINT file to so that we can investigate the crash. 
  • Certain models can have a "woodgrain" texture on curved vertical surfaces. There is an experimental feature which is designed to improve this behavior. If you are seeing this behavior, please contact to request access. 
  • Some users have reported some parts printing 1-2% small when Tango material is loaded but not being used. This issue is currently under investigation.

Software details

These are the programs that run in addition to those related to GrabCAD Print:

  • GCP.JobManager.Service.exe - This is the Job Manager installed in step 5. It manages jobs, slices the model and sends this to the Printer PC. It has no user interface.
  • GCP.JobManager.Service.WatchDog.exe - This monitors the above service, and restarts it in case of a crash. There is no user interface.
  • STRATASYS_J750.exe - This is the printer control application on the J750 that takes the slices, moves the motors, controls the heads, etc. This program is the user interface for controlling the J750.

In Scenario 1, all of these programs run on the Printer PC.

Next step: Connect your FDM printers or Take a quick tour

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