# Determinants of quality routing results **URL:** \ **Category:** Uncategorized\ **Created:** [May 8, 2024, 4:06pm UTC](https://forum.onefinitycnc.com/t/determinants-of-quality-routing-results/26906 "2024-05-08T16:06:41Z")\ **Posts on this page:** 1\ **Showing post:** 6
**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\ **Post date:** [May 8, 2024, 8:59pm UTC](https://forum.onefinitycnc.com/t/determinants-of-quality-routing-results/26906/6 "2024-05-08T20:59:00Z")
Hey Arthur, > [@ArtPetch](#): > > but the Elite series, with its heavier materials The hardware of [PRO](https://www.onefinitycnc.com/pro-series) and [Elite](https://www.onefinitycnc.com/elite-series) Series is identical. The PRO now have the 30 mm drag chains of the Elite Series and are also delivered with the [Z-20 “heavy” Z assembly](https://www.onefinitycnc.com/product-page/z-20-heavy-duty-z-slider). So they differ only from the CNC controller and its power supply, and the stepper motors. The Elite has photoelectric limit sensors while the stock PRO and Original Series rely on [stall homing](https://forum.onefinitycnc.com/t/how-common-are-missed-steps/18352/8) (but you can [retrofit limit sensors](https://forum.onefinitycnc.com/t/controller-software-tool-change-location-0-0-g54-g55-g56/10052/14) on the PRO and Original Series too). Both PRO and Elite Series have 50 mm rails on X axis. There is however no machinist (16" × 16") model on the PRO and Elite Series. The [Original Series](https://www.onefinitycnc.com/original-series-cnc-machines) differ in that they have only 35 mm thick rails on X axis. > [@ArtPetch](#): > > their relatively low torque stepper motors The torque required also directly depends on the ball screw pitch. With a flatter pitch your motors don’t need to have as much torque as with a steep pitch. --- _[View the full topic](https://forum.onefinitycnc.com/t/determinants-of-quality-routing-results/26906)._