DUal servi pid

Good day guys! I need a help for config, we have a plasma cutter two dual axis in x like x1 and x2. in hal config is x y z a.
I try to do tha : net Apos-cmd axis.0.joint-pos-cmd => pid.3.command
On the hal meter the two axis xommand is looks like good but one of them (a axis) little bit start before other. When speed is going to max the two axis is going sincron, but at start the a is quicker. can sombody hwlp me?

Thanks! Its working! cool!!!!!!