# Motion Controller / Simple Motion Controller - Synchronous control and interpolation control simultaneously

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Hi everyone!

I am currently using both Motion controller Q172DSCPU and Simple motion controller QD77MS for my application. I spent time for Advance synchronous control with Motion controller QD172DSCPU. However, I wonder that is there any solution to combine synchronous control and interpolation control?

For example, I need controlling 4 axes consisting of 3 axes for helical interpolation and 1 axis for linear position control. The problem is that all 4 axes start and complete position at the same time.

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You'll have to write some math to figure out the 4th axis, there is no built in way to achieve that.  Helical is always 3 axes.

Perhaps you can use gearing in some form and make the linear part of the helical axis the master for your 4th axis as a slave.

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Really, I have no ideas for this issue. Mitsubishi give a linear interpolation 4 axis, however this function only can use for PTP (point to point movement). I would like to synchronize a motion program with 2 axis for circular interpolation and a motion program with 2 axis for linear interpolation.  In the other words, both motion programs are started and completed simultaneously.

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Not a common motion application.  As i said, you will have to do it in logic.  Circular interpolation is always 2 axes.  Linear can involve up to 4.

As I said before, if you do helical interpolation, you will have 2 moving in a circular pattern while another moves linear, and you may be able to use gearing to make your other axis follow.