# Migrating from Mach4 to EX : Z axis extremely slow, impossible to home **URL:** \ **Category:** General Chat\ **Created:** [November 8, 2024, 3:58pm UTC](https://forum.avidcnc.com/t/migrating-from-mach4-to-ex-z-axis-extremely-slow-impossible-to-home/3905 "2024-11-08T15:58:44Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![nmathon](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/nmathon/32/2372_2.png) [@nmathon](https://forum.avidcnc.com/u/nmathon)\ **Post date:** [November 8, 2024, 3:58pm UTC](https://forum.avidcnc.com/t/migrating-from-mach4-to-ex-z-axis-extremely-slow-impossible-to-home/3905/1 "2024-11-08T15:58:44Z")
Hi, I am migrating from Mach 4 to the EX controller with Servos. I have a 8.7HP Spindle. I’m able to jog the machine on the X and Y axes, but I have a problem with the Z axis. I can jog up but jogging down is very very slow. It’s a little better with the pendant but it doesn’t really look normal speed. If I home the machine, the Z axis will take several minutes to move up by 1cm to the sensor. Do I have a problem with the break ? How can I check if the brake is released correctly? PS : I wrote to the support, but the weekend is coming and if I could get my machine back at work before tonight it would be very cool. Any idea of what I should check? ---
**Author:** ![nmathon](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/nmathon/32/2372_2.png) [@nmathon](https://forum.avidcnc.com/u/nmathon)\ **Post date:** [November 8, 2024, 4:06pm UTC](https://forum.avidcnc.com/t/migrating-from-mach4-to-ex-z-axis-extremely-slow-impossible-to-home/3905/2 "2024-11-08T16:06:03Z")
I just found this screen: ![image](https://canada1.discourse-cdn.com/flex027/uploads/avidcnc/original/2X/e/e0a06e165e8d05a927c464615e94684031e6fcd1.png) The Fast Jog for the Z- axis is set to 150mm/min by default. It’s very very slow. Do you all have the same parameters? I don’t understand why the fast jog is slower than the slow jog. ---
**Author:** ![nmathon](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/nmathon/32/2372_2.png) [@nmathon](https://forum.avidcnc.com/u/nmathon)\ **Post date:** [November 8, 2024, 4:16pm UTC](https://forum.avidcnc.com/t/migrating-from-mach4-to-ex-z-axis-extremely-slow-impossible-to-home/3905/3 "2024-11-08T16:16:10Z")
Ok, I started from scratch with a new profile and did not configure the machine to metrics and now everything works correctly. I believe there are a couple of issues when switching to metrics. I will follow up with Avid Support. ---
**Author:** ![Eric](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/eric/32/3220_2.png) [@Eric](https://forum.avidcnc.com/u/Eric)\ **Post date:** [November 8, 2024, 5:00pm UTC](https://forum.avidcnc.com/t/migrating-from-mach4-to-ex-z-axis-extremely-slow-impossible-to-home/3905/4 "2024-11-08T17:00:46Z")
We have an update coming to fix metric. Use imperial until next week when we release that update ---
**Author:** ![nmathon](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/nmathon/32/2372_2.png) [@nmathon](https://forum.avidcnc.com/u/nmathon)\ **Post date:** [November 8, 2024, 5:12pm UTC](https://forum.avidcnc.com/t/migrating-from-mach4-to-ex-z-axis-extremely-slow-impossible-to-home/3905/5 "2024-11-08T17:12:17Z")
Thanks, Eric. By the way, your latest video is awesome—it made the initial setup super easy. ---
**Author:** ![spsie](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/spsie/32/3073_2.png) [@spsie](https://forum.avidcnc.com/u/spsie)\ **Post date:** [December 27, 2024, 4:28pm UTC](https://forum.avidcnc.com/t/migrating-from-mach4-to-ex-z-axis-extremely-slow-impossible-to-home/3905/6 "2024-12-27T16:28:01Z")
Did the Metric patch/fix get implemented? I ran into this exact same issue today (Dec. 27, 2024) ---
**Author:** ![Eric](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/eric/32/3220_2.png) [@Eric](https://forum.avidcnc.com/u/Eric)\ **Post date:** [December 27, 2024, 4:55pm UTC](https://forum.avidcnc.com/t/migrating-from-mach4-to-ex-z-axis-extremely-slow-impossible-to-home/3905/7 "2024-12-27T16:55:38Z")
It’s currently in beta testing. I’ll send you a DM and get you in on the beta if you want to run in metric. ---
**Author:** ![spsie](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/spsie/32/3073_2.png) [@spsie](https://forum.avidcnc.com/u/spsie)\ **Post date:** [December 27, 2024, 5:07pm UTC](https://forum.avidcnc.com/t/migrating-from-mach4-to-ex-z-axis-extremely-slow-impossible-to-home/3905/8 "2024-12-27T17:07:42Z")
Cool! Thank you. ---
**Author:** ![ESchenk](https://avatars.discourse-cdn.com/v4/letter/e/aca169/32.png) [@ESchenk](https://forum.avidcnc.com/u/ESchenk)\ **Post date:** [December 28, 2024, 6:21am UTC](https://forum.avidcnc.com/t/migrating-from-mach4-to-ex-z-axis-extremely-slow-impossible-to-home/3905/9 "2024-12-28T06:21:53Z")
Hey Eric, I am running metric now with local mods, but would be to interested to beta test the update. any chance I can get on that list? Cheers, Eric S ---
**Author:** ![Eric](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/eric/32/3220_2.png) [@Eric](https://forum.avidcnc.com/u/Eric)\ **Post date:** [December 28, 2024, 12:05pm UTC](https://forum.avidcnc.com/t/migrating-from-mach4-to-ex-z-axis-extremely-slow-impossible-to-home/3905/10 "2024-12-28T12:05:04Z")
Invite sent! ---
**Author:** ![ESchenk](https://avatars.discourse-cdn.com/v4/letter/e/aca169/32.png) [@ESchenk](https://forum.avidcnc.com/u/ESchenk)\ **Post date:** [December 29, 2024, 6:27am UTC](https://forum.avidcnc.com/t/migrating-from-mach4-to-ex-z-axis-extremely-slow-impossible-to-home/3905/11 "2024-12-29T06:27:23Z")
Thanks! Downloaded. Will test things out tomorrow if I can. Cheers, Eric